Journal of Electroanalytical Chemistry最新文献

英文中文

Zinc-assisted modification of hard carbon for enhanced sodium-ion storage

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118889

Haoming Xiao , Fujian Wang , Jun Peng , Junhui Luo , Hongquan Li , Ziheng Wang , Xianyou Luo , Yong Chen

Hard carbon is recognized as a highly promising anode material for sodium-ion batteries (SIBs), with its microstructure playing a critical role in determining Na⁺ storage performance. Despite recent advancements in improving the Na⁺ storage capabilities of hard carbon, significant challenges remain in optimizing these materials. In this study, zinc-modified hard carbon was synthesized using coconut shells as the carbon source and ZnCl₂ as a modifier. The introduction of ZnCl₂ effectively expanded the graphite interlayer spacing, reduced microcrystal size, and created closed pores, leading to significantly enhanced Na⁺ storage performance. Consequently, the ZnCl₂-modified hard carbon exhibited a high reversible capacity of 352.0 mAh/g, with a plateau capacity of 242.6 mAh/g, outperforming the unmodified hard carbon (294.4 mAh/g and 199.8 mAh/g, respectively). Additionally, the modified material showed superior rate performance and cycling stability. The Na⁺ storage mechanism in the ZnCl₂-modified carbon aligns with the “adsorption-intercalation-filling” model. This study highlights the effectiveness of ZnCl₂ modification in enhancing Na⁺ storage, providing a promising strategy for the development of high-performance hard carbon anodes in SIBs.

{"title":"Zinc-assisted modification of hard carbon for enhanced sodium-ion storage","authors":"Haoming Xiao , Fujian Wang , Jun Peng , Junhui Luo , Hongquan Li , Ziheng Wang , Xianyou Luo , Yong Chen","doi":"10.1016/j.jelechem.2024.118889","DOIUrl":"10.1016/j.jelechem.2024.118889","url":null,"abstract":"<div><div>Hard carbon is recognized as a highly promising anode material for sodium-ion batteries (SIBs), with its microstructure playing a critical role in determining Na<sup>+</sup> storage performance. Despite recent advancements in improving the Na<sup>+</sup> storage capabilities of hard carbon, significant challenges remain in optimizing these materials. In this study, zinc-modified hard carbon was synthesized using coconut shells as the carbon source and ZnCl<sub>2</sub> as a modifier. The introduction of ZnCl<sub>2</sub> effectively expanded the graphite interlayer spacing, reduced microcrystal size, and created closed pores, leading to significantly enhanced Na<sup>+</sup> storage performance. Consequently, the ZnCl<sub>2</sub>-modified hard carbon exhibited a high reversible capacity of 352.0 mAh/g, with a plateau capacity of 242.6 mAh/g, outperforming the unmodified hard carbon (294.4 mAh/g and 199.8 mAh/g, respectively). Additionally, the modified material showed superior rate performance and cycling stability. The Na<sup>+</sup> storage mechanism in the ZnCl<sub>2</sub>-modified carbon aligns with the “adsorption-intercalation-filling” model. This study highlights the effectiveness of ZnCl<sub>2</sub> modification in enhancing Na<sup>+</sup> storage, providing a promising strategy for the development of high-performance hard carbon anodes in SIBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118889"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of pretreatment conditions on underpotential and phase deposition of silver on Pt(hkl) single crystal substrates in ethaline

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118887

Elena B. Molodkina, Alexander V. Rudnev, Maria R. Ehrenburg

Deep eutectic solvents (DES) are a special class of solvents with specific properties that offer new possibilities for the electroplating of metals and alloys. Ethaline – a mixture of choline chloride and ethylene glycol (EG) – is one of the less viscous DES, which makes it a commonly used medium for studying electrodeposition. The understanding of the metal electrodeposition behavior is much advanced by the data on structural sensitivity obtained with the help of single crystal electrodes. This work is continuation of a previous study on Ag electrosorption and phase deposition on Pt(111) in ethaline. We extend our studies to other basal single crystal surfaces, Pt(100) and Pt(110). Also, with account for the more pronounced sensitivity of these faces to the laboratory atmosphere as compared to Pt(111) and also with regard to the previously obtained data on the possibility of spontaneous EG decomposition on Pt with formation of a CO-like adspecies, we suggest an EG–protection step in the Pt(hkl) pretreatment procedure. We compare the data on Ag electrosorption and phase deposition on the three basal single crystal surfaces pretreated by EG (EG-protected) as opposed to surfaces with no such pretreatment (unprotected). We demonstrate that the EG-protection step results in the surface poisoning by the blocking adspecies. This brings about a significant lowering of the capacitance currents and the currents related to specific adsorption of ethaline components and Ag underpotential deposition (upd) as compared to those on unprotected Pt(hkl). We also show that phase deposition of silver from ethaline on Pt(hkl) starts at almost zero overpotentials on all electrodes except for EG-protected Pt(110), which is probably related to the presence of the already deposited Ag adlayer (for unprotected electrodes) and Ag adlayer patches (for EG-protected ones). In general, Ag deposition occurs via the Stranski–Krastanov mode. Deposition on unprotected electrodes involves simultaneous 2D and 3D deposit formation, while the deposit obtained at moderate overpotentials on all EG-pretreated electrodes contains well-pronounced individual shaped crystallites.

{"title":"Influence of pretreatment conditions on underpotential and phase deposition of silver on Pt(hkl) single crystal substrates in ethaline","authors":"Elena B. Molodkina, Alexander V. Rudnev, Maria R. Ehrenburg","doi":"10.1016/j.jelechem.2024.118887","DOIUrl":"10.1016/j.jelechem.2024.118887","url":null,"abstract":"<div><div>Deep eutectic solvents (DES) are a special class of solvents with specific properties that offer new possibilities for the electroplating of metals and alloys. Ethaline – a mixture of choline chloride and ethylene glycol (EG) – is one of the less viscous DES, which makes it a commonly used medium for studying electrodeposition. The understanding of the metal electrodeposition behavior is much advanced by the data on structural sensitivity obtained with the help of single crystal electrodes. This work is continuation of a previous study on Ag electrosorption and phase deposition on Pt(111) in ethaline. We extend our studies to other basal single crystal surfaces, Pt(100) and Pt(110). Also, with account for the more pronounced sensitivity of these faces to the laboratory atmosphere as compared to Pt(111) and also with regard to the previously obtained data on the possibility of spontaneous EG decomposition on Pt with formation of a CO-like adspecies, we suggest an EG–protection step in the Pt(hkl) pretreatment procedure. We compare the data on Ag electrosorption and phase deposition on the three basal single crystal surfaces pretreated by EG (EG-protected) as opposed to surfaces with no such pretreatment (unprotected). We demonstrate that the EG-protection step results in the surface poisoning by the blocking adspecies. This brings about a significant lowering of the capacitance currents and the currents related to specific adsorption of ethaline components and Ag underpotential deposition (upd) as compared to those on unprotected Pt(hkl). We also show that phase deposition of silver from ethaline on Pt(hkl) starts at almost zero overpotentials on all electrodes except for EG-protected Pt(110), which is probably related to the presence of the already deposited Ag adlayer (for unprotected electrodes) and Ag adlayer patches (for EG-protected ones). In general, Ag deposition occurs via the Stranski–Krastanov mode. Deposition on unprotected electrodes involves simultaneous 2D and 3D deposit formation, while the deposit obtained at moderate overpotentials on all EG-pretreated electrodes contains well-pronounced individual shaped crystallites.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118887"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suppression of the hydrogen evolution reaction of Iron–chromium flow batteries by organic compounds containing the imidazole group

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118874

Yihan Deng , Zhaoxin Li , Huayi Tan , Shili Zheng , Bingqiang Fan , Yang Zhang

Iron–chromium redox flow batteries (ICRFBs) are attractive potential long-duration energy storage facilities because of their extensive sources and low cost. However, the hydrogen evolution reaction (HER) causes irreversible capacity loss and limits its application. Herein, we explore the influence of organic compounds containing imidazole groups, such as l-histidine (l-his) and 2-methylimidazole (2-mIm), on the performance of negative iron–chromium electrolytes. The results of molecular dynamics and density functional theory calculations revealed that both additives can interact with chromium ions to regulate the solvation shell and that the new complex structures have greater hydrogen evolution barriers. The electrochemical test results show that 2-mIm has a more significant influence than l-his dose. The findings of the single battery tests with two additives indicate that both additives improve the coulombic efficiency (CE) and average decay rate of ICRFB. The capacity decay rate of ICRFB with the electrolyte containing 0.2 M 2-mIm reached 1.79 %. Compared with that of the pure electrolyte, the capacity decay rate is reduced by 76 % in the 0.2 M 2-mIm electrolyte. It achieves a CE of 97.8 % at a current density of 100 mA·cm⁻². Furthermore, UV–Vis spectroscopy and long-cycle tests revealed that new complex structures are present and stable during battery operation. Finally, the in situ Raman results show that additives can reduce the amount of water and disrupt the hydrogen bond network around the surface of the electrode during energization. The improvement in the hydrogen evolution barrier and Raman results explain the mechanism by which the HER is suppressed. This study provides a feasible rationale for additive selection.

{"title":"Suppression of the hydrogen evolution reaction of Iron–chromium flow batteries by organic compounds containing the imidazole group","authors":"Yihan Deng , Zhaoxin Li , Huayi Tan , Shili Zheng , Bingqiang Fan , Yang Zhang","doi":"10.1016/j.jelechem.2024.118874","DOIUrl":"10.1016/j.jelechem.2024.118874","url":null,"abstract":"<div><div>Iron–chromium redox flow batteries (ICRFBs) are attractive potential long-duration energy storage facilities because of their extensive sources and low cost. However, the hydrogen evolution reaction (HER) causes irreversible capacity loss and limits its application. Herein, we explore the influence of organic compounds containing imidazole groups, such as <span>l</span>-histidine (<span>l</span>-his) and 2-methylimidazole (2-mIm), on the performance of negative iron–chromium electrolytes. The results of molecular dynamics and density functional theory calculations revealed that both additives can interact with chromium ions to regulate the solvation shell and that the new complex structures have greater hydrogen evolution barriers. The electrochemical test results show that 2-mIm has a more significant influence than <span>l</span>-his dose. The findings of the single battery tests with two additives indicate that both additives improve the coulombic efficiency (CE) and average decay rate of ICRFB. The capacity decay rate of ICRFB with the electrolyte containing 0.2 M 2-mIm reached 1.79 %. Compared with that of the pure electrolyte, the capacity decay rate is reduced by 76 % in the 0.2 M 2-mIm electrolyte. It achieves a CE of 97.8 % at a current density of 100 mA·cm<sup>−2</sup>. Furthermore, UV–Vis spectroscopy and long-cycle tests revealed that new complex structures are present and stable during battery operation. Finally, the in situ Raman results show that additives can reduce the amount of water and disrupt the hydrogen bond network around the surface of the electrode during energization. The improvement in the hydrogen evolution barrier and Raman results explain the mechanism by which the HER is suppressed. This study provides a feasible rationale for additive selection.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118874"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi-interpenetrating polymer network-based gel polymer electrolytes for Li-ion batteries applications

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118885

Lanyang Feng, Yao Xu, Juan Wu, Bencai Lin

In this study, a series of high-performance semi-interpenetrating polymer network (sIPN)-based gel polymer electrolytes (GPEs) were prepared using UV-initiated polymerization of unsaturated-bond-containing ethylene oxide oligomers (specifically poly(ethylene glycol) methyl ether methacrylate(PEGMAMA) and poly(ethylene glycol) diacrylate(PEGDA)), followed by blending with linear poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP). PEGDA was used as the crosslinking agent to form a crosslinked structure with PEGMAMA. This unique architecture not only provided abundant ethylene oxide chain segments but also disrupted the crystallinity of PVDF-HFP. The sIPNs structure imparts GPEs with high thermal stabilities and robust mechanical properties. Among the sIPN-based GPEs, PP₂P₃-IL exhibited a high conductivity of 1.05 × 10⁻³ S cm⁻¹. Owing to the excellent dissociation ability of the sIPNs structure toward Li salts, PP₂P₃-IL shows a high Li-ion transference number of 0.68. The Li|PP₂P₃-IL|Li battery maintained a low steady-state overpotential, even after 800 h. Moreover, the discharge capacity of the Li/LiFePO₄ battery reached 150 mAh g⁻¹, and its capacity retention higher than 95 % even after 100 cycles, demonstrating its strong potential for application in Li-ion battery.

{"title":"Semi-interpenetrating polymer network-based gel polymer electrolytes for Li-ion batteries applications","authors":"Lanyang Feng, Yao Xu, Juan Wu, Bencai Lin","doi":"10.1016/j.jelechem.2024.118885","DOIUrl":"10.1016/j.jelechem.2024.118885","url":null,"abstract":"<div><div>In this study, a series of high-performance semi-interpenetrating polymer network (sIPN)-based gel polymer electrolytes (GPEs) were prepared using UV-initiated polymerization of unsaturated-bond-containing ethylene oxide oligomers (specifically poly(ethylene glycol) methyl ether methacrylate(PEGMAMA) and poly(ethylene glycol) diacrylate(PEGDA)), followed by blending with linear poly(vinylidene fluoride-<em>co</em>-hexafluoropropylene)(PVDF-HFP). PEGDA was used as the crosslinking agent to form a crosslinked structure with PEGMAMA. This unique architecture not only provided abundant ethylene oxide chain segments but also disrupted the crystallinity of PVDF-HFP. The sIPNs structure imparts GPEs with high thermal stabilities and robust mechanical properties. Among the sIPN-based GPEs, PP<sub>2</sub>P<sub>3</sub>-IL exhibited a high conductivity of 1.05 × 10<sup>−3</sup> S cm<sup>−1</sup>. Owing to the excellent dissociation ability of the sIPNs structure toward Li salts, PP<sub>2</sub>P<sub>3</sub>-IL shows a high Li-ion transference number of 0.68. The Li|PP<sub>2</sub>P<sub>3</sub>-IL|Li battery maintained a low steady-state overpotential, even after 800 h. Moreover, the discharge capacity of the Li/LiFePO<sub>4</sub> battery reached 150 mAh g<sup>−1</sup>, and its capacity retention higher than 95 % even after 100 cycles, demonstrating its strong potential for application in Li-ion battery.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118885"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PEDOT: Tosylate-polyamine-based enzymatic organic electrochemical transistors for high-performance glucose biosensing in human urine samples

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118867

Marjorie Montero-Jimenez , Jael R. Neyra Recky , Catalina von Bilderling , Juliana Scotto , Omar Azzaroni , Waldemar A. Marmisollé

We present the development of enzymatic PEDOT-PAH-based (polyethylenedioxythiophene-polyallylamine hydrochloride) organic electrochemical transistors (OECTs) for glucose detection in human urine samples via direct immobilization of glucose oxidase (GOx) onto PEDOT-PAH via electrostatic interactions. An alternative method for recording OECT responses was introduced, involving continuous switching of gate potential and subsequent data processing, which becomes effective for monitoring protein adsorption and reconstructing temporal response curves to analyte injections. Investigation into the sensing mechanism revealed the pivotal role of pH changes induced by enzymatic catalysis in the transistor response. Evaluation of OECT performance in media with higher ionic strength and buffering capacity demonstrated glucose sensing even in complex biological matrices, including promising results in human urine samples with sensitive response up to 2 mM spiked glucose concentration. These findings not only underscore the functionality of the proposed glucose sensor but also highlight the potential of enzymatic OECT-based sensors for biosensing applications in real biological media.

{"title":"PEDOT: Tosylate-polyamine-based enzymatic organic electrochemical transistors for high-performance glucose biosensing in human urine samples","authors":"Marjorie Montero-Jimenez , Jael R. Neyra Recky , Catalina von Bilderling , Juliana Scotto , Omar Azzaroni , Waldemar A. Marmisollé","doi":"10.1016/j.jelechem.2024.118867","DOIUrl":"10.1016/j.jelechem.2024.118867","url":null,"abstract":"<div><div>We present the development of enzymatic PEDOT-PAH-based (polyethylenedioxythiophene-polyallylamine hydrochloride) organic electrochemical transistors (OECTs) for glucose detection in human urine samples via direct immobilization of glucose oxidase (GOx) onto PEDOT-PAH via electrostatic interactions. An alternative method for recording OECT responses was introduced, involving continuous switching of gate potential and subsequent data processing, which becomes effective for monitoring protein adsorption and reconstructing temporal response curves to analyte injections. Investigation into the sensing mechanism revealed the pivotal role of pH changes induced by enzymatic catalysis in the transistor response. Evaluation of OECT performance in media with higher ionic strength and buffering capacity demonstrated glucose sensing even in complex biological matrices, including promising results in human urine samples with sensitive response up to 2 mM spiked glucose concentration. These findings not only underscore the functionality of the proposed glucose sensor but also highlight the potential of enzymatic OECT-based sensors for biosensing applications in real biological media.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118867"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MnO2 nanowires with abundant oxygen vacancies loaded to NCSC for the synergistically enhanced oxygen reduction reaction

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2025.118976

Aiai Zhang , Chunli Li , Zheng Liu, Shisi Yuan, Fengzhen Zhang

The key to promoting the four-electron pathway towards oxygen reduction reaction (ORR) lies in the design of efficient electrocatalysts. This study elucidated the impact of MnO₂ morphology and the combination of MnO₂ and N-doped coconut shell charcoal (NCSC) on generation of oxygen vacancies in MnO₂, thereby triggering the formation of active sites. The XPS analysis reveals that MnO₂-NW/NCSC possesses a higher concentration of oxygen vacancies, which facilitates the formation of surface oxygen adsorption centers. The MnO₂-NW/NCSC exhibits remarkable ORR activity with high initial potential (E_onset = 0.92 vs. RHE), half-wave potential (E_1/2 = 0.82 vs. RHE), diffusion-limited current density, and long-term durability. Moreover, the introduction of additional oxygen vacancies in MnO₂ can facilitate the decomposition of intermediates, thereby intensifying the O₂ reaction to OH⁻ and ultimately enhancing the ORR activity of MnO₂-NW/NCSC. By analyzing experimental results, this discovery highlights an extremely effective approach for investigating ORR catalysts with enhanced performance and durability.

{"title":"MnO2 nanowires with abundant oxygen vacancies loaded to NCSC for the synergistically enhanced oxygen reduction reaction","authors":"Aiai Zhang , Chunli Li , Zheng Liu, Shisi Yuan, Fengzhen Zhang","doi":"10.1016/j.jelechem.2025.118976","DOIUrl":"10.1016/j.jelechem.2025.118976","url":null,"abstract":"<div><div>The key to promoting the four-electron pathway towards oxygen reduction reaction (ORR) lies in the design of efficient electrocatalysts. This study elucidated the impact of MnO<sub>2</sub> morphology and the combination of MnO<sub>2</sub> and <em>N</em>-doped coconut shell charcoal (NCSC) on generation of oxygen vacancies in MnO<sub>2</sub>, thereby triggering the formation of active sites. The XPS analysis reveals that MnO<sub>2</sub>-NW/NCSC possesses a higher concentration of oxygen vacancies, which facilitates the formation of surface oxygen adsorption centers. The MnO<sub>2</sub>-NW/NCSC exhibits remarkable ORR activity with high initial potential (<em>E</em><sub>onset</sub> = 0.92 <em>vs</em>. RHE), half-wave potential (<em>E</em><sub>1/2</sub> = 0.82 <em>vs</em>. RHE), diffusion-limited current density, and long-term durability. Moreover, the introduction of additional oxygen vacancies in MnO<sub>2</sub> can facilitate the decomposition of intermediates, thereby intensifying the O<sub>2</sub> reaction to OH<sup>−</sup> and ultimately enhancing the ORR activity of MnO<sub>2</sub>-NW/NCSC. By analyzing experimental results, this discovery highlights an extremely effective approach for investigating ORR catalysts with enhanced performance and durability.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"981 ","pages":"Article 118976"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amorphous Fe-doped TiO2 nanosheet arrays: A catalyst for efficient nitrate reduction to ammonia

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118909

Jiuqing Xiong , Yifan Wang , Jingjing Wu , Shihai Yan , Bingping Liu

The electrocatalytic reduction of nitrate (NO₃⁻RR) to ammonia under mild conditions reduces energy consumption and helps to decrease greenhouse gas emissions, thus protecting the ecological environment. However, this reaction faces challenges such as low yield and low Faradaic efficiency (FE). Designing high-performance catalysts to improve ammonia (NH₃) yield and FE is an important pathway for NO₃⁻RR. In this paper, a novel catalyst is synthesized by doping amorphous iron onto TiO₂/Ti nanosheets, which maintains the morphology of the TiO₂/Ti nanosheets while enhancing catalytic performance. The highest FE of this catalyst reaches 97.67 % at −0.4 V (vs. RHE), with an NH₃ yield of 23.11 mg h⁻¹ cm⁻² at −0.7 V (vs. RHE). Additionally, this catalyst exhibits excellent stability and selectivity, outperforming most currently reported catalysts. Density functional theory calculations indicate that the doping of Fe in TiO₂/Ti leads to a lower bandgap, thereby improving the conductivity. In addition, the calculations show that Fe plays a significant role in structural adjustment and charge transfer during the catalytic process, reducing the energy barrier of the reaction and facilitating the NO₃⁻RR. This study suggests that the Fe-doped TiO₂/Ti nanosheets has great potential in the fields of NH₃ synthesis and wastewater treatment.

{"title":"Amorphous Fe-doped TiO2 nanosheet arrays: A catalyst for efficient nitrate reduction to ammonia","authors":"Jiuqing Xiong , Yifan Wang , Jingjing Wu , Shihai Yan , Bingping Liu","doi":"10.1016/j.jelechem.2024.118909","DOIUrl":"10.1016/j.jelechem.2024.118909","url":null,"abstract":"<div><div>The electrocatalytic reduction of nitrate (NO<sub>3</sub><sup>−</sup>RR) to ammonia under mild conditions reduces energy consumption and helps to decrease greenhouse gas emissions, thus protecting the ecological environment. However, this reaction faces challenges such as low yield and low Faradaic efficiency (FE). Designing high-performance catalysts to improve ammonia (NH<sub>3</sub>) yield and FE is an important pathway for NO<sub>3</sub><sup>−</sup>RR. In this paper, a novel catalyst is synthesized by doping amorphous iron onto TiO<sub>2</sub>/Ti nanosheets, which maintains the morphology of the TiO<sub>2</sub>/Ti nanosheets while enhancing catalytic performance. The highest FE of this catalyst reaches 97.67 % at −0.4 V (vs. RHE), with an NH<sub>3</sub> yield of 23.11 mg h<sup>−1</sup> cm<sup>−2</sup> at −0.7 V (vs. RHE). Additionally, this catalyst exhibits excellent stability and selectivity, outperforming most currently reported catalysts. Density functional theory calculations indicate that the doping of Fe in TiO<sub>2</sub>/Ti leads to a lower bandgap, thereby improving the conductivity. In addition, the calculations show that Fe plays a significant role in structural adjustment and charge transfer during the catalytic process, reducing the energy barrier of the reaction and facilitating the NO<sub>3</sub><sup>−</sup>RR. This study suggests that the Fe-doped TiO<sub>2</sub>/Ti nanosheets has great potential in the fields of NH<sub>3</sub> synthesis and wastewater treatment.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118909"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SnSe2/CoSe2@N-C composites with high energy storage performance for lithium ion batteries

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118898

Ying Gao, Wei Jiang, Yanfeng Meng, Deyang Zhao, Zhiqiang Lv, Hongyu Li, Jiyang Li, Fangyuan Zhou, Yudong Pan, Qikai Si, Yanbin Xu, Zhenglong Yang

Tin-based selenide is regarded as one of the promising anode materials for the advanced lithium ion batteries (LIBs) due to its high theoretical capacity and environmental friendliness. However, the huge volume change during cycling has severely hampered their practical application. Herein, core–shell nanostructured SnSe₂/CoSe₂@N-C composites are prepared by in-situ selenization of carbon-encapsulated Co-imidazole-based ZIF-67 grown on prefabricated SnO₂ nanoparticles. The composite exhibits good structural stability and improved electrical conductivity when used as anode, since the N-doped carbon skeleton originated from ZIF-67 can act as an elastic protecting and electronically conductive layer to alleviate the volume expansion. In addition, the CoSe₂ derived from ZIF-67 plays an important role in the enhancement of the specific capacity. As anode for LIBs, the SnSe₂/CoSe₂@N-C shows excellent cycle stability with a capacity of 1111.8 mA h g⁻¹ after 200 cycles at the current density of 200 mA g⁻¹. Even at a high rate of 1000 mA g⁻¹, the specific capacity of 597.3 mA h g⁻¹ can be achieved after 450 cycles.

{"title":"SnSe2/CoSe2@N-C composites with high energy storage performance for lithium ion batteries","authors":"Ying Gao, Wei Jiang, Yanfeng Meng, Deyang Zhao, Zhiqiang Lv, Hongyu Li, Jiyang Li, Fangyuan Zhou, Yudong Pan, Qikai Si, Yanbin Xu, Zhenglong Yang","doi":"10.1016/j.jelechem.2024.118898","DOIUrl":"10.1016/j.jelechem.2024.118898","url":null,"abstract":"<div><div>Tin-based selenide is regarded as one of the promising anode materials for the advanced lithium ion batteries (LIBs) due to its high theoretical capacity and environmental friendliness. However, the huge volume change during cycling has severely hampered their practical application. Herein, core–shell nanostructured SnSe<sub>2</sub>/CoSe<sub>2</sub>@N-C composites are prepared by in-situ selenization of carbon-encapsulated Co-imidazole-based ZIF-67 grown on prefabricated SnO<sub>2</sub> nanoparticles. The composite exhibits good structural stability and improved electrical conductivity when used as anode, since the N-doped carbon skeleton originated from ZIF-67 can act as an elastic protecting and electronically conductive layer to alleviate the volume expansion. In addition, the CoSe<sub>2</sub> derived from ZIF-67 plays an important role in the enhancement of the specific capacity. As anode for LIBs, the SnSe<sub>2</sub>/CoSe<sub>2</sub>@N-C shows excellent cycle stability with a capacity of 1111.8 mA h g<sup>−1</sup> after 200 cycles at the current density of 200 mA g<sup>−1</sup>. Even at a high rate of 1000 mA g<sup>−1</sup>, the specific capacity of 597.3 mA h g<sup>−1</sup> can be achieved after 450 cycles.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118898"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A binder-free copper sulfide cathode material for aluminum-ion batteries

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118880

Reyhan Solmaz, B.Deniz Karahan, Ozgul Keles

This work realizes the fabrication of binderless cathode for aluminum ion batteries, the most promising alternative energy storage technology of next-generation batteries. The hypothesis is to test the concentration of urea on the morphology of copper sulfide particles grown on a nickel foam via hydrothermal synthesis for Al-ion batteries. In this context, the hydrothermal approach has been effectively employed for depositing cathode active material (CAM), copper sulfide, directly on a Ni foam, the current collector. Four distinct samples have been produced at varying urea ratios (CS-4 (4 mmol), CS-8 (8 mmol), CS-12 (12 mmol), CS-24 (24 mmol)) for the first time in the literature. The impact of the urea concentration on the CAM’s morphology and structure has been assessed using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). Their electrochemical performances have been evaluated based on the potentiostatic (cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS)), and galvanostatic (charge/discharge tests) tests results. CS-12 made by 12 mmol of urea, has high crystallinity and flower-like morphology with flakes, it delivers the best electrochemical performance with 69 mAh/g after 100 cycles under a current load of 200 mA g⁻¹.

{"title":"A binder-free copper sulfide cathode material for aluminum-ion batteries","authors":"Reyhan Solmaz, B.Deniz Karahan, Ozgul Keles","doi":"10.1016/j.jelechem.2024.118880","DOIUrl":"10.1016/j.jelechem.2024.118880","url":null,"abstract":"<div><div>This work realizes the fabrication of binderless cathode for aluminum ion batteries, the most promising alternative energy storage technology of next-generation batteries. The hypothesis is to test the concentration of urea on the morphology of copper sulfide particles grown on a nickel foam via hydrothermal synthesis for Al-ion batteries. In this context, the hydrothermal approach has been effectively employed for depositing cathode active material (CAM), copper sulfide, directly on a Ni foam, the current collector. Four distinct samples have been produced at varying urea ratios (CS-4 (4 mmol), CS-8 (8 mmol), CS-12 (12 mmol), CS-24 (24 mmol)) for the first time in the literature. The impact of the urea concentration on the CAM’s morphology and structure has been assessed using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). Their electrochemical performances have been evaluated based on the potentiostatic (cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS)), and galvanostatic (charge/discharge tests) tests results. CS-12 made by 12 mmol of urea, has high crystallinity and flower-like morphology with flakes, it delivers the best electrochemical performance with 69 mAh/g after 100 cycles under a current load of 200 mA g<sup>−1</sup>.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118880"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal-organic frame-derived Sn/SnO2 nanoparticles anchored to octahedral porphyrins for lithium-ion storage

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-01 DOI: 10.1016/j.jelechem.2024.118895

Jiancong Guo, Luzheng Zhao, Zaoyan Yu, Wenruo Li, Weiqiang Kong, Haoyuan Zhu, Xu Han, Yushuai Song, Song Li, Zhongsheng Wen

Tin-based composites have been regarded as promising anode materials for lithium-ion batteries (LIBs). However, obvious challenges in volume expansion and poor ionic conductivity have hindered their further application in LIBs. In this study, an ingenious precursor – a nanoparticle metal–organic framework anchored to the Nickel (II)meso-Tetraphenylporphyin (NiTPP) composites was constructed. The precursor was annealed at different temperatures to obtain a variety of Sn-MOF/NiTPP composites. When utilized as an anode material for LIBs, the Sn-MOF/NiTPP composite exhibited excellent electrochemical properties at a heat treatment temperature of 300 °C and demonstrated reversible lithium storage capacity of 1050 mAh/g at a current density of 200 mA/g after 200 cycles. This can be attributed to the appropriate selection of heat treatment temperature and the incorporation of octahedral porphyrins that enhance charge transfer ability. Therefore, this study not only proposes a high-performance lithium-ion battery anode but also presents a novel approach for constructing metal/metal oxide-organic composites.

{"title":"Metal-organic frame-derived Sn/SnO2 nanoparticles anchored to octahedral porphyrins for lithium-ion storage","authors":"Jiancong Guo, Luzheng Zhao, Zaoyan Yu, Wenruo Li, Weiqiang Kong, Haoyuan Zhu, Xu Han, Yushuai Song, Song Li, Zhongsheng Wen","doi":"10.1016/j.jelechem.2024.118895","DOIUrl":"10.1016/j.jelechem.2024.118895","url":null,"abstract":"<div><div>Tin-based composites have been regarded as promising anode materials for lithium-ion batteries (LIBs). However, obvious challenges in volume expansion and poor ionic conductivity have hindered their further application in LIBs. In this study, an ingenious precursor – a nanoparticle metal–organic framework anchored to the Nickel (II)<em>meso</em>-Tetraphenylporphyin (NiTPP) composites was constructed. The precursor was annealed at different temperatures to obtain a variety of Sn-MOF/NiTPP composites. When utilized as an anode material for LIBs, the Sn-MOF/NiTPP composite exhibited excellent electrochemical properties at a heat treatment temperature of 300 °C and demonstrated reversible lithium storage capacity of 1050 mAh/g at a current density of 200 mA/g after 200 cycles. This can be attributed to the appropriate selection of heat treatment temperature and the incorporation of octahedral porphyrins that enhance charge transfer ability. Therefore, this study not only proposes a high-performance lithium-ion battery anode but also presents a novel approach for constructing metal/metal oxide-organic composites.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118895"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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