Pub Date : 2025-01-11DOI: 10.1016/j.electacta.2024.145629
Ruonan Jin, Qingqing Lu, Junjie Liao, Yuzhou Zhu, Tao Huang, Wenhui Wang, Yuheng Wu, Hamilton Varela, Kamel Eid
The authors regret that Fig. 6 and Figure 8 are the same as our original article [1] by mistake, and all authors apologize for any inconvenience caused. We want to replace Fig. 6 with the correct figure, as shown in the following.
Download: Download high-res image (600KB)
Download: Download full-size image
Fig. 6. (a-c) CVs for MOR of sponge-like PtPb, sponge-like Pt, and Pt/C measured under different scan rates in an aqueous solution of 1.0 M KOH with 1.0 M CH3OH and (d-f) their correlated plot of If vs. ν1/2 respectively.
{"title":"Corrigendum to “Prompt Template-free Synthesis of Porous PtPb Sponge-like Nanostructure for Electro-oxidation of Methanol and Carbon Monoxide” [Electrochim. Acta 508, (2024) 145210]","authors":"Ruonan Jin, Qingqing Lu, Junjie Liao, Yuzhou Zhu, Tao Huang, Wenhui Wang, Yuheng Wu, Hamilton Varela, Kamel Eid","doi":"10.1016/j.electacta.2024.145629","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145629","url":null,"abstract":"The authors regret that <span><span>Fig. 6</span></span> and Figure 8 are the same as our original article [<span><span>1</span></span>] by mistake, and all authors apologize for any inconvenience caused. We want to replace <span><span>Fig. 6</span></span> with the correct figure, as shown in the following.<figure><span><img alt=\"Fig 6\" aria-describedby=\"cap0001\" height=\"424\" src=\"https://ars.els-cdn.com/content/image/1-s2.0-S0013468624018644-gr1.jpg\"/><ol><li><span><span>Download: <span>Download high-res image (600KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span><span><span><p><span>Fig. 6</span>. (a-c) CVs for MOR of sponge-like PtPb, sponge-like Pt, and Pt/C measured under different scan rates in an aqueous solution of 1.0 M KOH with 1.0 M CH<sub>3</sub>OH and (d-f) their correlated plot of I<sub>f</sub> vs. <em>ν</em><sup>1/2</sup> respectively.</p></span></span></figure>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"7 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-11DOI: 10.1016/j.electacta.2025.145689
Yingqi Di, Guofeng Pan, Song Lv, Liunan She, Le Zhai, Yuhang Qi
As integrated circuits continue to shrink, Co has been introduced into Cu interconnect structures as a barrier material. However, achieving an optimized removal rate ratio between Cu and Co in simple slurry formulation for the chemical mechanical polishing (CMP) of Cu interconnects with Co-based barrier layers remains a significant challenge. In this study, we identified the dual functionality of salicylhydroxamic acid (SHA) in Cu CMP and achieved a 1:1 selective removal rate ratio between Cu and Co. When used in conjunction with H2O2, SHA achieves the target remove rate (RR) for the barrier layer (Cu RR = 163 Å/min, Co RR = 155 Å/min) while maintaining a low static etch rate (SER) of 1.84 Å/min and excellent surface quality (Sq = 1.61 nm). SHA can adsorb onto the surface of oxidized Cu through O atoms, forming a protective layer that inhibits corrosion. Under mechanical friction, SHA molecules on elevated surface regions detach and react with Cu2+, facilitating Cu removal. Meanwhile, SHA molecules adsorbed on lower surface regions remain intact. The synergistic action of SHA enables simultaneous Cu removal and corrosion protection, effectively replacing traditional complexing agents and inhibitors, thus simplifying the formulation of polishing solutions.
{"title":"Chemical mechanical polishing on cobalt-based barrier through dual functionality of salicylhydroxamic acid between the removal of copper and corrosion inhibition","authors":"Yingqi Di, Guofeng Pan, Song Lv, Liunan She, Le Zhai, Yuhang Qi","doi":"10.1016/j.electacta.2025.145689","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145689","url":null,"abstract":"As integrated circuits continue to shrink, Co has been introduced into Cu interconnect structures as a barrier material. However, achieving an optimized removal rate ratio between Cu and Co in simple slurry formulation for the chemical mechanical polishing (CMP) of Cu interconnects with Co-based barrier layers remains a significant challenge. In this study, we identified the dual functionality of salicylhydroxamic acid (SHA) in Cu CMP and achieved a 1:1 selective removal rate ratio between Cu and Co. When used in conjunction with H<sub>2</sub>O<sub>2</sub>, SHA achieves the target remove rate (RR) for the barrier layer (Cu RR = 163 Å/min, Co RR = 155 Å/min) while maintaining a low static etch rate (SER) of 1.84 Å/min and excellent surface quality (Sq = 1.61 nm). SHA can adsorb onto the surface of oxidized Cu through O atoms, forming a protective layer that inhibits corrosion. Under mechanical friction, SHA molecules on elevated surface regions detach and react with Cu<sup>2+</sup>, facilitating Cu removal. Meanwhile, SHA molecules adsorbed on lower surface regions remain intact. The synergistic action of SHA enables simultaneous Cu removal and corrosion protection, effectively replacing traditional complexing agents and inhibitors, thus simplifying the formulation of polishing solutions.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"204 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-10DOI: 10.1016/j.electacta.2025.145683
Qian-Cheng Zhu, Xu- Bo Xin, Shi-Huan Zhou, Zi-Yuan Wang, De- Yu Mao, Ai-Jun Fu
Li–CO2 batteries (LCBs) stand out as promising candidates for high-energy-density storage solutions, capturing widespread interest and research focus. However, the high charging voltage and poor cycling stability owing to the sluggish reaction kinetics of carbon dioxide reduction seriously limit the commercialization of LCBs. Herein, a composite of cobalt and molybdenum carbide nanoparticles decorated three-dimensional N-doped graphene was fabricated as an efficient cathode catalysts for LCBs . The porous structure and large specific surface area of graphene substrate provide abundant catalytic active sites and sufficient deposition space for discharge products. The co-catalytic effect of cobalt-molybdenum carbide bimetal greatly enhances the CO2 reaction kinetics. The assembled LCBs exhibited a ultrahigh discharge capacity of 27,886 mAh g−1 at 100 mA g−1, a long cycle life of 248 cycles (limited capacity of 500 mAh g−1), and a low overpotential of 1.56 V. This research presents a practical approach to developing highly effective cathode catalysts, aiming to enhance the operational efficiency of LCBs.
{"title":"Synthesis of Co-Mo2C nanoparticles decorated three-dimensional N-doped graphene composite as an efficient cathode catalyst for Li–CO2 batteries","authors":"Qian-Cheng Zhu, Xu- Bo Xin, Shi-Huan Zhou, Zi-Yuan Wang, De- Yu Mao, Ai-Jun Fu","doi":"10.1016/j.electacta.2025.145683","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145683","url":null,"abstract":"Li–CO<sub>2</sub> batteries (LCBs) stand out as promising candidates for high-energy-density storage solutions, capturing widespread interest and research focus. However, the high charging voltage and poor cycling stability owing to the sluggish reaction kinetics of carbon dioxide reduction seriously limit the commercialization of LCBs. Herein, a composite of cobalt and molybdenum carbide nanoparticles decorated three-dimensional N-doped graphene was fabricated as an efficient cathode catalysts for LCBs . The porous structure and large specific surface area of graphene substrate provide abundant catalytic active sites and sufficient deposition space for discharge products. The co-catalytic effect of cobalt-molybdenum carbide bimetal greatly enhances the CO<sub>2</sub> reaction kinetics. The assembled LCBs exhibited a ultrahigh discharge capacity of 27,886 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup>, a long cycle life of 248 cycles (limited capacity of 500 mAh g<sup>−1</sup>), and a low overpotential of 1.56 V. This research presents a practical approach to developing highly effective cathode catalysts, aiming to enhance the operational efficiency of LCBs.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"5 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-10DOI: 10.1016/j.electacta.2025.145677
Mostafa Torabi, Ewa Nazaruk, Renata Bilewicz
The free-standing lipid mesophase film within an H-cell is proposed as a suitable device for electrochemical impedance spectroscopy and voltammetric or chronoamperometry studies of ion transport through a lipidic membrane. Unlike the commonly used electrodes covered with lipid films, it has an aqueous solution on both sides of the membrane and, therefore, can serve as a more realistic biological membrane model. This approach was used to investigate the incorporation of ion channel peptides, exemplified by the potassium channel gramicidin A, into the liquid-crystalline cubic phase membrane. The lipidic mesophase samples with and without gramicidin peptide were characterized using SAXS and electrochemical methods. The improvement of conductivity of the lipidic cubic structure in the presence of gramicidin was ascribed to gramicidin A molecules spanning the lipidic walls to connect the aqueous channels of the liquid-crystalline structure and enhance the transport of ions through the membrane. The voltammetric and EIS experiments also revealed a clear inhibitory effect of Ca2+ as a divalent cation on gramicidin, which is known to be a specific monovalent-ion channel. Based on the results of this study focused on gramicidin reconstituted in the flexible lipid matrix, it is suggested as a suitable lipid platform for studying other ion-transport or catalytic membrane proteins and peptides, as well as their activators and inhibitors.
{"title":"Free-Standing Lipidic Mesophase Film Hosting Gramicidin A –Membrane Ion Transport Study","authors":"Mostafa Torabi, Ewa Nazaruk, Renata Bilewicz","doi":"10.1016/j.electacta.2025.145677","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145677","url":null,"abstract":"The free-standing lipid mesophase film within an H-cell is proposed as a suitable device for electrochemical impedance spectroscopy and voltammetric or chronoamperometry studies of ion transport through a lipidic membrane. Unlike the commonly used electrodes covered with lipid films, it has an aqueous solution on both sides of the membrane and, therefore, can serve as a more realistic biological membrane model. This approach was used to investigate the incorporation of ion channel peptides, exemplified by the potassium channel gramicidin A, into the liquid-crystalline cubic phase membrane. The lipidic mesophase samples with and without gramicidin peptide were characterized using SAXS and electrochemical methods. The improvement of conductivity of the lipidic cubic structure in the presence of gramicidin was ascribed to gramicidin A molecules spanning the lipidic walls to connect the aqueous channels of the liquid-crystalline structure and enhance the transport of ions through the membrane. The voltammetric and EIS experiments also revealed a clear inhibitory effect of Ca<sup>2+</sup> as a divalent cation on gramicidin, which is known to be a specific monovalent-ion channel. Based on the results of this study focused on gramicidin reconstituted in the flexible lipid matrix, it is suggested as a suitable lipid platform for studying other ion-transport or catalytic membrane proteins and peptides, as well as their activators and inhibitors.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"47 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrochemical impedance spectroscopy (EIS), as a non-destructive evaluation technique, is extensively utilized in analyzing the degradation process of batteries. The distribution of relaxation times (DRT) serves as a powerful tool, eliminating the need for prior knowledge required by the traditional equivalent circuits model (ECM), in interpreting EIS. Valve-regulated lead-acid (VRLA) batteries, are commonly used as backup power sources in critical applications and represent one of the most widely used battery types, yet their degradation is commonly overlooked and necessitates further research. Therefore, this paper provides the first comprehensive DRT analysis of the float charging aging process of VRLA batteries through aging experiments. Based on the results, this paper identifies the optimal range of the regularization parameter (λ) in calculating the DRT of VRLA batteries as between 10-6 and 10-5. Based on this, it is determined that VRLA DRT exhibits four peaks regardless of changes in state of health (SOH) and state of charge (SOC). Additionally, it is found that the P1 peak in the high-frequency region has a good linear relationship with both SOH and SOC, with linear fitting coefficients of 0.861 and 0.991, respectively. This finding aids in the application of DRT for the state diagnosis of VRLA batteries, offering a DRT approach for VRLA degradation studies.
{"title":"Investigation of Distribution of Relaxation Times Responding to Valve-Regulated Lead Acid Batteries Degradation Process","authors":"Kun Yang, Zheyuan Pang, Zhengxiang Song, Pengcheng Niu, Zhuoyu Feng, Jinhao Meng","doi":"10.1016/j.electacta.2025.145682","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145682","url":null,"abstract":"Electrochemical impedance spectroscopy (EIS), as a non-destructive evaluation technique, is extensively utilized in analyzing the degradation process of batteries. The distribution of relaxation times (DRT) serves as a powerful tool, eliminating the need for prior knowledge required by the traditional equivalent circuits model (ECM), in interpreting EIS. Valve-regulated lead-acid (VRLA) batteries, are commonly used as backup power sources in critical applications and represent one of the most widely used battery types, yet their degradation is commonly overlooked and necessitates further research. Therefore, this paper provides the first comprehensive DRT analysis of the float charging aging process of VRLA batteries through aging experiments. Based on the results, this paper identifies the optimal range of the regularization parameter (λ) in calculating the DRT of VRLA batteries as between 10<sup>-6</sup> and 10<sup>-5</sup>. Based on this, it is determined that VRLA DRT exhibits four peaks regardless of changes in state of health (SOH) and state of charge (SOC). Additionally, it is found that the P1 peak in the high-frequency region has a good linear relationship with both SOH and SOC, with linear fitting coefficients of 0.861 and 0.991, respectively. This finding aids in the application of DRT for the state diagnosis of VRLA batteries, offering a DRT approach for VRLA degradation studies.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"45 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-10DOI: 10.1016/j.electacta.2025.145685
Lishang Zhang, Yanping Lin, Zhe Shi, He Zhou, Hui Wang, Feng Wu, Lei Zhao, Yan Zeng, Bingrui Kong, Wenbin Gong, Fali Chong
Aqueous zinc ion batteries (ZIBs) have attracted increasing attention because of their safe aqueous electrolyte, relatively low price, and suitable energy density. Lots of researchers have reported the use of surfactants as electrolyte additives to improve battery performance in AZIBs, but most of them focus on the zinc anode issues. Here, the surfactant electrolyte additive strategy was used to investigate the effect of the cathode/ electrolyte interface on cathode dissolution suppression, self-discharge inhibition, and desolvation kinetics. As a result, the electrolyte with sodium dodecyl sulfate (SDS) additive immersed with hydrated sodium vanadate electrodes shows no significant color change during the 24-hour immersion test, while the original ZnSO4 electrolyte turns yellow after only 0.5 hours. The discharge capacity of the electrolyte with SDS addition after the open-circuit voltage (OCV) test is 97.8% of the charging capacity before the OCV test, while the discharge capacity of the ZnSO4 electrolyte is only 78.7%. These results demonstrate the surfactant electrolyte additive strategy could be a feasible way to construct robust ZIBs with suppressed cathode dissolution, inhibited self-discharge, and improved interface kinetics. This work provides new insights to understand the electrolyte additive and offers a reference for other energy storage systems.
{"title":"Revealing the Multifunctional Nature of Surfactant Electrolyte Additive in Aqueous Zinc Ion Batteries","authors":"Lishang Zhang, Yanping Lin, Zhe Shi, He Zhou, Hui Wang, Feng Wu, Lei Zhao, Yan Zeng, Bingrui Kong, Wenbin Gong, Fali Chong","doi":"10.1016/j.electacta.2025.145685","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145685","url":null,"abstract":"Aqueous zinc ion batteries (ZIBs) have attracted increasing attention because of their safe aqueous electrolyte, relatively low price, and suitable energy density. Lots of researchers have reported the use of surfactants as electrolyte additives to improve battery performance in AZIBs, but most of them focus on the zinc anode issues. Here, the surfactant electrolyte additive strategy was used to investigate the effect of the cathode/ electrolyte interface on cathode dissolution suppression, self-discharge inhibition, and desolvation kinetics. As a result, the electrolyte with sodium dodecyl sulfate (SDS) additive immersed with hydrated sodium vanadate electrodes shows no significant color change during the 24-hour immersion test, while the original ZnSO<sub>4</sub> electrolyte turns yellow after only 0.5 hours. The discharge capacity of the electrolyte with SDS addition after the open-circuit voltage (OCV) test is 97.8% of the charging capacity before the OCV test, while the discharge capacity of the ZnSO<sub>4</sub> electrolyte is only 78.7%. These results demonstrate the surfactant electrolyte additive strategy could be a feasible way to construct robust ZIBs with suppressed cathode dissolution, inhibited self-discharge, and improved interface kinetics. This work provides new insights to understand the electrolyte additive and offers a reference for other energy storage systems.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"1 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-10DOI: 10.1016/j.electacta.2025.145672
Bogeun Choi, Seongsu Im, Segu Jang, Youngseung Na
The gas diffusion layer (GDL), a key component of proton exchange membrane fuel cells (PEMFCs), is unevenly compressed by the ribs of both the anode and cathode bipolar plates (BP). The electrical and transport characteristics of the GDL vary with the compression ratio, which influences the supply of reactants, discharge products, and the movement of electrons. This study analyzes the performance differences and overpotentials based on the flow-field combinations. The four combinations, named after the anode flow field, are parallel, rotated, shifted, and wavy. The overpotentials of the fuel cell are analyzed using current-voltage curves, electrochemical impedance spectroscopy, and the current interruption method under three operating conditions with different stoichiometric ratios and relative humidity. Through experiments, we decompose the fuel cell overpotential into activation overpotential (ignoring liquid water), ohmic overpotential, concentration overpotential (ignoring liquid water), and liquid water overpotential. The shift combination exhibits excellent performance owing to its high water-discharge effect despite its high ohmic overpotential, whereas the parallel combination exhibits the lowest performance due to flooding. Consequently, by changing the flow field combination under the same operating conditions, the performance improves by up to 33%.
{"title":"Effects of Flow Field Combination in Proton Exchange Membrane Fuel Cells on Water Management","authors":"Bogeun Choi, Seongsu Im, Segu Jang, Youngseung Na","doi":"10.1016/j.electacta.2025.145672","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145672","url":null,"abstract":"The gas diffusion layer (GDL), a key component of proton exchange membrane fuel cells (PEMFCs), is unevenly compressed by the ribs of both the anode and cathode bipolar plates (BP). The electrical and transport characteristics of the GDL vary with the compression ratio, which influences the supply of reactants, discharge products, and the movement of electrons. This study analyzes the performance differences and overpotentials based on the flow-field combinations. The four combinations, named after the anode flow field, are parallel, rotated, shifted, and wavy. The overpotentials of the fuel cell are analyzed using current-voltage curves, electrochemical impedance spectroscopy, and the current interruption method under three operating conditions with different stoichiometric ratios and relative humidity. Through experiments, we decompose the fuel cell overpotential into activation overpotential (ignoring liquid water), ohmic overpotential, concentration overpotential (ignoring liquid water), and liquid water overpotential. The shift combination exhibits excellent performance owing to its high water-discharge effect despite its high ohmic overpotential, whereas the parallel combination exhibits the lowest performance due to flooding. Consequently, by changing the flow field combination under the same operating conditions, the performance improves by up to 33%.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"24 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The authors regret < There were two errors identified in the article and are described here. These errors are typographical and require correction to improve the accuracy and clarity of the published work.
{"title":"Corrigendum to “Effect of Formic Acid on Aqueous Corrosion Mechanisms of Mild Steel” [Electrochimica Acta, Volume 503, 2024, 144863]","authors":"Sahithi Ayyagari, Maryam Eslami, Fazlollah Madani Sani, Yoon-Seok Choi, Bruce Brown, Srdjan Nesic","doi":"10.1016/j.electacta.2025.145644","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145644","url":null,"abstract":"The authors regret < <strong>There were two errors identified in the article and are described here. These errors are typographical and require correction to improve the accuracy and clarity of the published work.</strong>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"1 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-09DOI: 10.1016/j.electacta.2025.145681
Yanqiang Zou, Guo-hua Liu, Qiangang Li, Suying Ding, Binhua Liu, Lu Qi, Hongchen Wang
Electrochemical reduction of nitrate (NO3−) offers a promising approach for nitrate removing from water. Development of non-noble metal electrocatalysts with high reactivity and selectivity is crucial for the electrochemical reduction of NO3−. Herein, Ni-doped Cu(OH)2 nanowires (Ni-Cu(OH)2 NW/CF) were synthesised on copper foam (CF) and utilised as a cathode, enabling efficient and selective nitrate removal with further conversion to harmless N2. The Ni-Cu(OH)2 NW/CF electrode achieved a 99.8% NO3−-N conversion rate within 40 min, with a reaction rate 25 times higher than CF and 1.51 times than that of Cu(OH)2. It demonstrated a rapid nitrate reduction apparent rate constant (0.02072 cm−2 min−1) without nitrite accumulation. With the assistance of active chlorine at the anode, the electrocatalytic system effectively converted NO3− into harmless N2, achieving a final N2 selectivity of 99.9%. The Cu(OH)2 nanowires provided abundant active sites to enhance NO3− adsorption and conversion, while Ni doping mainly accelerated the reduction of NO2− intermediate by facilitating the atomic hydrogen (H*)-mediated reaction pathway on the electrode surface. This relay catalytic effect enhanced the electrode's adsorption and reduction capabilities for NO3−. Notably, the Ni-Cu(OH)2 NW/CF electrode maintained consistent performance over 10 experimental cycles. This study provides novel strategy for designing non-noble metal electrocatalysts with high selectivity and efficiency for NO3− removal.
{"title":"Highly selective and efficient electrochemical nitrate removal via Ni-doped Cu(OH)2 nanowires promoting H* reaction","authors":"Yanqiang Zou, Guo-hua Liu, Qiangang Li, Suying Ding, Binhua Liu, Lu Qi, Hongchen Wang","doi":"10.1016/j.electacta.2025.145681","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145681","url":null,"abstract":"Electrochemical reduction of nitrate (NO<sub>3</sub><sup>−</sup>) offers a promising approach for nitrate removing from water. Development of non-noble metal electrocatalysts with high reactivity and selectivity is crucial for the electrochemical reduction of NO<sub>3</sub><sup>−</sup>. Herein, Ni-doped Cu(OH)<sub>2</sub> nanowires (Ni-Cu(OH)<sub>2</sub> NW/CF) were synthesised on copper foam (CF) and utilised as a cathode, enabling efficient and selective nitrate removal with further conversion to harmless N<sub>2</sub>. The Ni-Cu(OH)<sub>2</sub> NW/CF electrode achieved a 99.8% NO<sub>3</sub><sup>−</sup>-N conversion rate within 40 min, with a reaction rate 25 times higher than CF and 1.51 times than that of Cu(OH)<sub>2</sub>. It demonstrated a rapid nitrate reduction apparent rate constant (0.02072 cm<sup>−2</sup> min<sup>−1</sup>) without nitrite accumulation. With the assistance of active chlorine at the anode, the electrocatalytic system effectively converted NO<sub>3</sub><sup>−</sup> into harmless N<sub>2</sub>, achieving a final N<sub>2</sub> selectivity of 99.9%. The Cu(OH)<sub>2</sub> nanowires provided abundant active sites to enhance NO<sub>3</sub><sup>−</sup> adsorption and conversion, while Ni doping mainly accelerated the reduction of NO<sub>2</sub><sup>−</sup> intermediate by facilitating the atomic hydrogen (H*)-mediated reaction pathway on the electrode surface. This relay catalytic effect enhanced the electrode's adsorption and reduction capabilities for NO<sub>3</sub><sup>−</sup>. Notably, the Ni-Cu(OH)<sub>2</sub> NW/CF electrode maintained consistent performance over 10 experimental cycles. This study provides novel strategy for designing non-noble metal electrocatalysts with high selectivity and efficiency for NO<sub>3</sub><sup>−</sup> removal.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"27 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-09DOI: 10.1016/j.electacta.2025.145674
Tobias Glossmann, Wei Lai, Michael Sevilla, Xiangqun Zeng
Potential electrochemical detection and de-chlorination pathways of trichloroethylene (TCE) in acetonitrile (AN) with an ionic liquid (IL) co-solvent were investigated using computational methods. To our knowledge, no previous study systematically examined the thermodynamics and kinetics of the formation of possible reaction intermediates and products and structural properties in a similar non-aqueous electrolyte. Our findings provide direction for effective electrochemical detection and de-chlorination of TCE and other chlorinated compounds in non-aqueous media. This study predicts that electrochemical reaction pathways in absence of substantial proton concentration and with a sufficiently negative potential all result in acetylene. The dominating intermediate is chloroacetylene, but for a smaller fraction of reactions, trans-1,2-dichloroethylene (trans-DCE) is the intermediate instead. Each reduction step breaks one of the three C-Cl bonds initially, forming a radical. In the next steps, immediately following reductive dechlorination, limited stability of intermediate anions narrows intermediate compounds to chloroacetylene and some trans-DCE; both can be reduced further. Vinyl chloride (VC) is not generated. Full reduction of all intermediates results in acetylene, which will readily escape the solution. TCE and chloroacetylene do not evaporate from the solution as readily as AN, so full reduction of TCE is expected in this electrolyte. This feature is enabled by the IL content of the electrolyte. Most notably to this end, hydrogen of acetylene and chloroacetylene interact with the tetrafluoroborate (BF4-) anion. Our study takes a different perspective on electrochemical dechlorination or detection of TCE by assuming a blended aprotic solvent. These findings may lead to the design of better electrochemical systems for developing chemical sensors and more effective approaches to remediating organic pollutants.
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