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}
Pub Date : 2025-02-01DOI: 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}
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}
Pub Date : 2025-02-01DOI: 10.1016/j.jelechem.2024.118875
Lan Wang , Lingyun Luo , Zeng Guo , Yi Wang , Xiaonan Liu
To date, platinum (Pt)-based materials are among the most commonly used anodic catalysts in direct methanol fuel cells (DMFCs) due to their fast kinetics for methanol oxidation reaction (MOR). However, the high cost of Pt, along with its poor anti-poisoning properties and stability, has hindered the widespread adoption of DMFCs. Consequently, strategies such as architecture control and composition adjustment have been introduced to reduce costs and enhance activity. This review begins with an introduction to the composition and mechanism of MOR at the anode of DMFCs, as well as the performance evaluation and measurement criteria for MOR and DMFCs. It then systematically discusses strategies like creating nanoclusters, nanowires, nanocubes, and nanospheres, and incorporating different elements to modify the electronic structure of Pt-based materials and improve performance. Special attention is given to the process and mechanism of MOR for these new catalysts. Finally, to accelerate the development of DMFCs, the opportunities and challenges for Pt-based materials in MOR are proposed and discussed.
{"title":"Challenges and strategic advancements in platinum-based catalysts for tailored methanol oxidation reaction","authors":"Lan Wang , Lingyun Luo , Zeng Guo , Yi Wang , Xiaonan Liu","doi":"10.1016/j.jelechem.2024.118875","DOIUrl":"10.1016/j.jelechem.2024.118875","url":null,"abstract":"<div><div>To date, platinum (Pt)-based materials are among the most commonly used anodic catalysts in direct methanol fuel cells (DMFCs) due to their fast kinetics for methanol oxidation reaction (MOR). However, the high cost of Pt, along with its poor anti-poisoning properties and stability, has hindered the widespread adoption of DMFCs. Consequently, strategies such as architecture control and composition adjustment have been introduced to reduce costs and enhance activity. This review begins with an introduction to the composition and mechanism of MOR at the anode of DMFCs, as well as the performance evaluation and measurement criteria for MOR and DMFCs. It then systematically discusses strategies like creating nanoclusters, nanowires, nanocubes, and nanospheres, and incorporating different elements to modify the electronic structure of Pt-based materials and improve performance. Special attention is given to the process and mechanism of MOR for these new catalysts. Finally, to accelerate the development of DMFCs, the opportunities and challenges for Pt-based materials in MOR are proposed and discussed.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118875"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128318","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}
Pub Date : 2025-02-01DOI: 10.1016/j.jelechem.2024.118901
Zhuang Wu, Xuefeng Zhang, Fan Cheng, Yun Tong, Yihan Xue, Jialiang An, Zhao Fang
Nickel-rich ternary cathode materials have garnered extensive interest due to their high specific discharge capacity and energy density. However, the undesired challenges, such as severe lithium-nickel mixing, micro-cracks evolution, and complex fabrication processes, have significantly impeded the practical deployment of ternary materials. Hence, addressing these challenges, an effective multidimensional synergistic regulation of nickel-rich ternary materials is achieved through a simple one-step high-temperature calcination process in this work. This method has the technical advantages of short preparation process, low cost and small environmental pollution. Specifically, the carefully selected Zr4+ is employed as a dopant to achieve cationic doping and simultaneously form an evenly distributed Li2ZrO3 coating layer on the surface of the single crystal particle. Such a reliable solution effectively inhibits lithium-nickel mixing, significantly enhances structural stability, and enlarges the layer spacing, providing a favorable pathway to Li+ diffusion and storage. As expected, the improved initial discharge capacity demonstrates a 10 % increase, reaching 163.4 mAh/g. After 200 cycles at 1 C, the capacity retention rate reveals a substantial enhancement, attaining 87.8 %, compared to the 63.05 % observed in the unmodified sample. Such a promising solution provides an opportunity for the practical application of ternary cathode materials.
{"title":"An efficient multidimensional synergistic regulation strategy to boost nickel-rich ternary cathodes for Li-ion batteries","authors":"Zhuang Wu, Xuefeng Zhang, Fan Cheng, Yun Tong, Yihan Xue, Jialiang An, Zhao Fang","doi":"10.1016/j.jelechem.2024.118901","DOIUrl":"10.1016/j.jelechem.2024.118901","url":null,"abstract":"<div><div>Nickel-rich ternary cathode materials have garnered extensive interest due to their high specific discharge capacity and energy density. However, the undesired challenges, such as severe lithium-nickel mixing, micro-cracks evolution, and complex fabrication processes, have significantly impeded the practical deployment of ternary materials. Hence, addressing these challenges, an effective multidimensional synergistic regulation of nickel-rich ternary materials is achieved through a simple one-step high-temperature calcination process in this work. This method has the technical advantages of short preparation process, low cost and small environmental pollution. Specifically, the carefully selected Zr<sup>4+</sup> is employed as a dopant to achieve cationic doping and simultaneously form an evenly distributed Li<sub>2</sub>ZrO<sub>3</sub> coating layer on the surface of the single crystal particle. Such a reliable solution effectively inhibits lithium-nickel mixing, significantly enhances structural stability, and enlarges the layer spacing, providing a favorable pathway to Li<sup>+</sup> diffusion and storage. As expected, the improved initial discharge capacity demonstrates a 10 % increase, reaching 163.4 mAh/g. After 200 cycles at 1 C, the capacity retention rate reveals a substantial enhancement, attaining 87.8 %, compared to the 63.05 % observed in the unmodified sample. Such a promising solution provides an opportunity for the practical application of ternary cathode materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118901"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092104","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}
Pub Date : 2025-02-01DOI: 10.1016/j.jelechem.2024.118897
Shuangshuang Tian , Liqiang Chen , Hong Zhang , Liangquan Sheng , Xinxin Wang , Deqian Huang
CdTe quantum dots (CdTe QDs) were synthesized using mercaptopropionic acid (MPA) as a stabilizer. The electrochemiluminescence (ECL) mechanism of CdTe QDs was examined at cathodic (−2.1 to 0 V) and anodic (0–1.5 V) potentials. Utilizing dissolved oxygen as a co-reactant for cathodic CdTe QDs, the addition of phenylephrine hydrochloride (PEH) triggers a burst effect on the intermediate OH at the electrode surface, resulting in a reduction of electron hole formation. Consequently, a novel method for detecting PEH in the concentration range of 0.2–10 μM has been developed. A strong linear correlation was observed between LgCPEH and the ECL intensity ratio (I/I0) of cathodic CdTe QDs, with a detection limit of 37 nM. Tri-n-propylamine (TPrA) was utilized as a co-reactant for the anode of CdTe QDs. The addition of paliperidone (PP) occupies the oxidized vacancies of TPrA, leading to a diminished ECL signal. A new method was subsequently established to detect PP in the concentration range of 0.2 nM–1.0 μM with a detection limit of 18 pM. This method has been successfully applied to detect PEH in urine and in compound tropicamide eye drops, as well as to quantify PP content in paliperidone sustained-release tablets and serum, demonstrating excellent recovery and selectivity.
{"title":"Electrochemiluminescent properties of CdTe quantum dots in different potential ranges and their application to the ultra-sensitive detection of phenylephrine hydrochloride and paliperidone","authors":"Shuangshuang Tian , Liqiang Chen , Hong Zhang , Liangquan Sheng , Xinxin Wang , Deqian Huang","doi":"10.1016/j.jelechem.2024.118897","DOIUrl":"10.1016/j.jelechem.2024.118897","url":null,"abstract":"<div><div>CdTe quantum dots (CdTe QDs) were synthesized using mercaptopropionic acid (MPA) as a stabilizer. The electrochemiluminescence (ECL) mechanism of CdTe QDs was examined at cathodic (−2.1 to 0 V) and anodic (0–1.5 V) potentials. Utilizing dissolved oxygen as a co-reactant for cathodic CdTe QDs, the addition of phenylephrine hydrochloride (PEH) triggers a burst effect on the intermediate OH<sup><img></sup> at the electrode surface, resulting in a reduction of electron hole formation. Consequently, a novel method for detecting PEH in the concentration range of 0.2–10 μM has been developed. A strong linear correlation was observed between Lg<em>C</em><sub>PEH</sub> and the ECL intensity ratio (<em>I/I</em><sub>0</sub>) of cathodic CdTe QDs, with a detection limit of 37 nM. Tri-<em>n</em>-propylamine (TPrA) was utilized as a co-reactant for the anode of CdTe QDs. The addition of paliperidone (PP) occupies the oxidized vacancies of TPrA, leading to a diminished ECL signal. A new method was subsequently established to detect PP in the concentration range of 0.2 nM–1.0 μM with a detection limit of 18 pM. This method has been successfully applied to detect PEH in urine and in compound tropicamide eye drops, as well as to quantify PP content in paliperidone sustained-release tablets and serum, demonstrating excellent recovery and selectivity.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118897"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092105","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}
Pub Date : 2025-02-01DOI: 10.1016/j.jelechem.2024.118894
Shuguang Zhu , Ke Liu , Yingyi Ding , Liang Wu , Junwei Chen , Jie Mao , Hao Huang
The low electronic conductivity and ion diffusion rate of lithium iron phosphate (LiFePO4) are the main factors limiting its further development as a positive electrode material for lithium-ion batteries. Element doping is an effective method to improve these limitations. In this study, the method of co-doping with cations and anions has been attempted to improve the electrochemical performance of lithium iron phosphate cathode materials. V-Cl co-doped LiFePO4/C samples were successfully prepared using the high temperature solid-phase method. The controlled particle size LiFe0.95V0.05PO0.95Cl0.05/C was characterized using XRD, XPS, SEM, and the band structure changes of the system were calculated using the first-principles calculations. The results show that V-Cl co-doped lithium iron phosphate materials could significantly enhance the electrochemical performance of lithium iron phosphate batteries, especially at 1C and 5C rates (1C = 170 mAh/g), where the capacities of the modified lithium iron phosphate battery electrodes could still maintain 89 % and 83 % after 1000 cycles. The synergistic effect of anions and cations in V-Cl co-doped system has been confirmed by the first-principles calculations, could effectively reduce the energy barrier for electronic band transitions and improve electronic conductivity.
{"title":"The electrochemical enhancement effect and synergistic modification mechanism of V-Cl co-doping on carbon coated lithium iron phosphate cathode materials","authors":"Shuguang Zhu , Ke Liu , Yingyi Ding , Liang Wu , Junwei Chen , Jie Mao , Hao Huang","doi":"10.1016/j.jelechem.2024.118894","DOIUrl":"10.1016/j.jelechem.2024.118894","url":null,"abstract":"<div><div>The low electronic conductivity and ion diffusion rate of lithium iron phosphate (LiFePO<sub>4</sub>) are the main factors limiting its further development as a positive electrode material for lithium-ion batteries. Element doping is an effective method to improve these limitations. In this study, the method of co-doping with cations and anions has been attempted to improve the electrochemical performance of lithium iron phosphate cathode materials. V-Cl co-doped LiFePO<sub>4</sub>/C samples were successfully prepared using the high temperature solid-phase method. The controlled particle size LiFe<sub>0.95</sub>V<sub>0.05</sub>PO<sub>0.95</sub>Cl<sub>0.05</sub>/C was characterized using XRD, XPS, SEM, and the band structure changes of the system were calculated using the first-principles calculations. The results show that V-Cl co-doped lithium iron phosphate materials could significantly enhance the electrochemical performance of lithium iron phosphate batteries, especially at 1C and 5C rates (1C = 170 mAh/g), where the capacities of the modified lithium iron phosphate battery electrodes could still maintain 89 % and 83 % after 1000 cycles. The synergistic effect of anions and cations in V-Cl co-doped system has been confirmed by the first-principles calculations, could effectively reduce the energy barrier for electronic band transitions and improve electronic conductivity.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118894"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092123","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}
Achieving carbon neutrality necessitates innovative strategies, such as CO2-driven conversion technologies, to convert carbon dioxide into useful chemicals and fuels. An initiative of surfactant-driven interfacial engineering holds promises for transforming copper catalysts in electrochemical CO2 reduction. This work demonstrates tailoring the surface contact using surfactant and its impact on reaction behaviour as a proof-of-concept. Herein we exploit a surfactant-directed interface via electrodeposition techniques with a treatment of CTAB (cetyltrimethylammonium bromide) to enhance the hydrophobicity of the copper surfaces. This modification strategy resulted in notable enhancements in electrocatalytic kinetics and a reduced onset potential, thereby facilitating more efficient initiation of CO2 reduction reactions. However, a remarkable improvement has been observed in Faradaic efficiency (FE) which rose from 40% with unmodified copper electrodes to 71% with CTAB-modified electrodes. This enhancement represents improved selectivity for the CO2 reduction reaction and significant improvements in formate synthesis. Furthermore, the copper surface treated with CTAB displayed outstanding stability, retaining a high level of FE over 12 h. These findings show that surfactant-driven interface engineering has the potential to revolutionise copper surfaces and improve the stability and efficiency of electrochemical CO2 reduction technologies.
{"title":"Surfactant-driven interfacial engineering of copper surfaces for enhanced electrochemical CO2 reduction","authors":"Aarthi Pandiarajan , Gurusamy Hemalatha , Babu Mahalakshmi , Subbiah Ravichandran","doi":"10.1016/j.jelechem.2024.118883","DOIUrl":"10.1016/j.jelechem.2024.118883","url":null,"abstract":"<div><div>Achieving carbon neutrality necessitates innovative strategies, such as CO<sub>2</sub>-driven conversion technologies, to convert carbon dioxide into useful chemicals and fuels. An initiative of surfactant-driven interfacial engineering holds promises for transforming copper catalysts in electrochemical CO<sub>2</sub> reduction. This work demonstrates tailoring the surface contact using surfactant and its impact on reaction behaviour as a proof-of-concept. Herein we exploit a surfactant-directed interface via electrodeposition techniques with a treatment of CTAB (cetyltrimethylammonium bromide) to enhance the hydrophobicity of the copper surfaces. This modification strategy resulted in notable enhancements in electrocatalytic kinetics and a reduced onset potential, thereby facilitating more efficient initiation of CO<sub>2</sub> reduction reactions. However, a remarkable improvement has been observed in Faradaic efficiency (FE) which rose from 40% with unmodified copper electrodes to 71% with CTAB-modified electrodes. This enhancement represents improved selectivity for the CO<sub>2</sub> reduction reaction and significant improvements in formate synthesis. Furthermore, the copper surface treated with CTAB displayed outstanding stability, retaining a high level of FE over 12 h. These findings show that surfactant-driven interface engineering has the potential to revolutionise copper surfaces and improve the stability and efficiency of electrochemical CO<sub>2</sub> reduction technologies.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118883"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092129","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}
Pub Date : 2025-02-01DOI: 10.1016/j.jelechem.2024.118893
Yunpeng Liu , Jie Shen , Jinxing Lu , Guoyu Zhong
Constructing a cost-effective glucose sensor has attracted the attention of researchers, since the detection of blood glucose level play a critical role on determining diabetes. The electrochemical nonenzymatic glucose sensor has the advantages of good stability, high sensitivity and low fabrication cost, compared with enzyme-based glucose sensors. Herein, the Ni nanoparticles embedded within N-doped carbon nanotubes was prepared by high-temperature pyrolysis of precursor composed of NiCl2 and dicyandiamide, namely Ni@NC700. Benefiting from the abundant Ni3+ active species from electrooxidation of Ni nanoparticles and the large specific surface area and electrical conductivity of Ni@NC700, the nonenzymatic sensor presented a remarkable electrocatalytic glucose oxidation performance. The resulting Ni@NC700 exhibited a high sensitivity of 299.65 μA mM−1 cm−2, a fast response time of 1.36 s, and a low detection limit of 1.1 µM. In addition, the Ni@NC700 showed the excellent anti-interference ability in the presence of dopamine, KCl, urea, NaCl, uric acid, ascorbic acid, sucrose, and maltose interferences. In addition, the sensor exhibited good stability and satisfactory reproducibility (RSD of 1 %). The successful synthesis of the Ni nanoparticles embedded within N-doped carbon nanotubes provided intensive insight on high-efficiency electrochemical nonenzymatic glucose sensing.
{"title":"Controlled synthesis of Ni nanoparticles embedded within N-doped carbon nanotubes for electrochemical nonenzymatic glucose sensing","authors":"Yunpeng Liu , Jie Shen , Jinxing Lu , Guoyu Zhong","doi":"10.1016/j.jelechem.2024.118893","DOIUrl":"10.1016/j.jelechem.2024.118893","url":null,"abstract":"<div><div>Constructing a cost-effective glucose sensor has attracted the attention of researchers, since the detection of blood glucose level play a critical role on determining diabetes. The electrochemical nonenzymatic glucose sensor has the advantages of good stability, high sensitivity and low fabrication cost, compared with enzyme-based glucose sensors. Herein, the Ni nanoparticles embedded within N-doped carbon nanotubes was prepared by high-temperature pyrolysis of precursor composed of NiCl<sub>2</sub> and dicyandiamide, namely Ni@NC<sub>700</sub>. Benefiting from the abundant Ni<sup>3+</sup> active species from electrooxidation of Ni nanoparticles and the large specific surface area and electrical conductivity of Ni@NC<sub>700</sub>, the nonenzymatic sensor presented a remarkable electrocatalytic glucose oxidation performance. The resulting Ni@NC<sub>700</sub> exhibited a high sensitivity of 299.65 μA mM<sup>−1</sup> cm<sup>−2</sup>, a fast response time of 1.36 s, and a low detection limit of 1.1 µM. In addition, the Ni@NC<sub>700</sub> showed the excellent anti-interference ability in the presence of dopamine, KCl, urea, NaCl, uric acid, ascorbic acid, sucrose, and maltose interferences. In addition, the sensor exhibited good stability and satisfactory reproducibility (RSD of 1 %). The successful synthesis of the Ni nanoparticles embedded within N-doped carbon nanotubes provided intensive insight on high-efficiency electrochemical nonenzymatic glucose sensing.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"978 ","pages":"Article 118893"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092635","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}
Pub Date : 2025-01-31DOI: 10.1016/j.jelechem.2025.118977
Rajan Maurya, Raghunandan Sharma, Shuang Ma Andersen
To achieve high current density of oxygen reduction reaction (ORR) and mimic the realistic working conditions of the fuel cell, a simple hanging electrode experimental set-up for the gas diffusion electrode (GDE) test is developed. The ORR activities of GDE with 15, 30, and 45 wt% Nafion content were accessed in an oxygen environment hanging electrode set-up. The GDE containing 15 and 30 wt% Nafion demonstrated relatively high ORR activity, while the GDE with 45 wt% Nafion exhibited the lowest ORR activity. Further, the mass-transport properties were accessed through electrochemical impedance spectroscopy (EIS) measurement, which revealed that GDE with 45 wt% Nafion offers the highest equivalent distributed resistance (EDR) and polarization resistance (RP); therefore, the lowest ORR activity. The Advantages of the ORR activity measurements in hanging electrode configuration over the conventional thin-film rotating disk electrode (TF-RDE) method are also highlighted. Based on ORR activity measurements and impedance analysis in newly developed hanging electrode setup, GDE with 30 wt% Nafion content is recommended for fuel cell MEA construction using state-of-the-art catalyst (Pt/C ∼ 60 wt%) structure. The hanging electrode set-up can provide a quick firsthand screening on the ORR activity of GDEs and predict the GDE behaviour in the fuel cells.
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