Pub Date : 2025-01-17DOI: 10.1016/j.electacta.2025.145717
Lihong Liu, Bo Li, Ming Yang, Yannan Mu, Duo zhang, Lihua Huo
Metal oxide and graphene composite material have been a promising material for developing electrochemical sensors. In this work, we prepared graphene (rGO) doped MoO2 hollow nanosphere composite (MoO2/rGO) using a simple one-step solvothermal without any template.The hollow nanosphere was constructed by nanoparticles and uniformly anchored onto graphene sheets.The dopamine (DA) sensor was constructed by modifying the MoO2/rGO composite to the glass carbon electrode (GCE) surface with a simple drop coating (MoO2/rGO/GCE), which shows high sensitivity(101.20 μA·μM-1·cm-2), low detection limit (6.8 nM), high selectivity and good stability for DA. Meanwhile, the MoO2/rGO/GCE demonstrates very little interference with dopamine determination when both Uric acid (UA) and ascorbic acid (AA) are present. The exceptional efficacy of the sensor is attributed to the MoO₂/rGO composite's unique attributes,which include a hollow structure, low charge transfer resistance, a large electrochemical active area, and an abundance of active sites. Furthermore, the MoO₂/rGO/GCE sensor demonstrates capabilities for the detection of minute dopamine levels in human serum, utilizing the standard addition method. This suggests its applicability in the realm of biomedical diagnostics.
{"title":"Prepared Hollow Nanosphere MoO2/rGO Composite for low concentration Dopamine Detection","authors":"Lihong Liu, Bo Li, Ming Yang, Yannan Mu, Duo zhang, Lihua Huo","doi":"10.1016/j.electacta.2025.145717","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145717","url":null,"abstract":"Metal oxide and graphene composite material have been a promising material for developing electrochemical sensors. In this work, we prepared graphene (rGO) doped MoO<sub>2</sub> hollow nanosphere composite (MoO<sub>2</sub>/rGO) using a simple one-step solvothermal without any template.The hollow nanosphere was constructed by nanoparticles and uniformly anchored onto graphene sheets.The dopamine (DA) sensor was constructed by modifying the MoO<sub>2</sub>/rGO composite to the glass carbon electrode (GCE) surface with a simple drop coating (MoO<sub>2</sub>/rGO/GCE), which shows high sensitivity(101.20 μA·μM<sup>-1</sup>·cm<sup>-2</sup>), low detection limit (6.8 nM), high selectivity and good stability for DA. Meanwhile, the MoO<sub>2</sub>/rGO/GCE demonstrates very little interference with dopamine determination when both Uric acid (UA) and ascorbic acid (AA) are present. The exceptional efficacy of the sensor is attributed to the MoO₂/rGO composite's unique attributes,which include a hollow structure, low charge transfer resistance, a large electrochemical active area, and an abundance of active sites. Furthermore, the MoO₂/rGO/GCE sensor demonstrates capabilities for the detection of minute dopamine levels in human serum, utilizing the standard addition method. This suggests its applicability in the realm of biomedical diagnostics.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"96 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988147","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 : 2025-01-17DOI: 10.1016/j.electacta.2025.145709
Kristijan Vidović, Niki Simonović, Nikola Tasić, Samo B. Hočevar, Irena Ciglenečki
Pursuing an effective and sensitive methodology for studying surface-active substances (SAS) remains a major challenge and continues to attract significant attention. Here, we propose and evaluate an electrochemical methodology that utilizes alternative current (AC) voltammetry in combination with contemporary potentiostats without an integrated lock-in amplifier. The proposed methodology effectively separates capacitive currents from faradaic currents and is compared to phase-sensitive AC voltammetry (PSACV), which is conventionally used to assess SAS. The practical applicability of this methodology is demonstrated by measuring SAS in real samples with complex matrices, such as seawater and atmospheric aerosol water extracts. Furthermore, the proposed methodology opens vast possibilities for its application in environmental sciences, where SAS plays an important role.
{"title":"Study of Surface-Active Substances Using Alternating Current Voltammetry and Mercury Electrode by Potentiostat without Phase Sensitivity Modules","authors":"Kristijan Vidović, Niki Simonović, Nikola Tasić, Samo B. Hočevar, Irena Ciglenečki","doi":"10.1016/j.electacta.2025.145709","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145709","url":null,"abstract":"Pursuing an effective and sensitive methodology for studying surface-active substances (SAS) remains a major challenge and continues to attract significant attention. Here, we propose and evaluate an electrochemical methodology that utilizes alternative current (AC) voltammetry in combination with contemporary potentiostats without an integrated lock-in amplifier. The proposed methodology effectively separates capacitive currents from faradaic currents and is compared to phase-sensitive AC voltammetry (PSACV), which is conventionally used to assess SAS. The practical applicability of this methodology is demonstrated by measuring SAS in real samples with complex matrices, such as seawater and atmospheric aerosol water extracts. Furthermore, the proposed methodology opens vast possibilities for its application in environmental sciences, where SAS plays an important role.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"88 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988430","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 : 2025-01-16DOI: 10.1016/j.electacta.2025.145713
Francisco Duarte, Aleksey D. Lisenkov, Andrei V. Kovalevsky, Daniela V. Lopes
Alkaline electrowinning is a promising sustainable ironmaking technology, characterised by operation at low temperatures and reduced energy consumption, in contrast to the traditional route which produces CO2 emissions. While hematite has been the primary focus of most studies, only a limited number of alternative iron-based raw materials have been investigated as potential feedstocks for electrowinning. This work aims to evaluate, for the first time, the valorisation potential of a β-FeOOH based residue, using pretreatment-free electrowinning. The electroreduction experiments conducted in 10 M NaOH at 90°C (0.025 A.cm-2) achieved a Faradaic efficiency of 59%, comparable to pure hematite (57%), which is traditionally regarded as a primary iron source in electrowinning for green steelmaking. Increasing the electrolyte concentration to 18 M at 105-130°C, decreased the efficiency by about 20% in comparison to hematite, revealing a lower quality of iron deposits. However, potentiostatic electrowinning in the reference conditions, -1.15 V in 10 M NaOH, successfully reached an unprecedented 83% Faradaic efficiency, accompanied by an improvement in the quality of the iron deposits. These results highlight a high potential of β-FeOOH-containing industrial residues for direct valorisation through electrowinning, contributing to a more sustainable steelmaking process.
{"title":"Iron electrowinning from a nickel refinery residue for sustainable steelmaking","authors":"Francisco Duarte, Aleksey D. Lisenkov, Andrei V. Kovalevsky, Daniela V. Lopes","doi":"10.1016/j.electacta.2025.145713","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145713","url":null,"abstract":"Alkaline electrowinning is a promising sustainable ironmaking technology, characterised by operation at low temperatures and reduced energy consumption, in contrast to the traditional route which produces CO<sub>2</sub> emissions. While hematite has been the primary focus of most studies, only a limited number of alternative iron-based raw materials have been investigated as potential feedstocks for electrowinning. This work aims to evaluate, for the first time, the valorisation potential of a β-FeOOH based residue, using pretreatment-free electrowinning. The electroreduction experiments conducted in 10 M NaOH at 90°C (0.025 A.cm<sup>-2</sup>) achieved a Faradaic efficiency of 59%, comparable to pure hematite (57%), which is traditionally regarded as a primary iron source in electrowinning for green steelmaking. Increasing the electrolyte concentration to 18 M at 105-130°C, decreased the efficiency by about 20% in comparison to hematite, revealing a lower quality of iron deposits. However, potentiostatic electrowinning in the reference conditions, -1.15 V in 10 M NaOH, successfully reached an unprecedented 83% Faradaic efficiency, accompanied by an improvement in the quality of the iron deposits. These results highlight a high potential of β-FeOOH-containing industrial residues for direct valorisation through electrowinning, contributing to a more sustainable steelmaking process.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"5 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986895","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 : 2025-01-16DOI: 10.1016/j.electacta.2025.145714
Evgenia Dmitrieva, Alexey A. Popov, Horst Hartmann
The charged species of 10H-phenothiazinyl-substituted thiophenes have been investigated by means of combined in situ electron paramagnetic resonance (EPR) and ultraviolet−visible−near infrared (UV−Vis−NIR) spectroelectrochemistry. The molecular structure of the compounds under study contains one or two phenothiazine moieties, which are connected by various thiophene linkers in the case of the latter. The optical and magnetic properties of the radical cations and dications as well as the information about their stability were provided. The impact of the linker structure on charge localization (on phenothiazine or thiophene moiety) for bis-phenothiazinyl-substituted compounds was investigated. The experimental data were supported by density functional theory (DFT) calculations, which predicted the favored charged structures of the studied compounds.
{"title":"EPR/UV–Vis–NIR spectroelectrochemical characterization of 10H-phenothiazinyl-substituted oligothiophenes","authors":"Evgenia Dmitrieva, Alexey A. Popov, Horst Hartmann","doi":"10.1016/j.electacta.2025.145714","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145714","url":null,"abstract":"The charged species of 10<em>H</em>-phenothiazinyl-substituted thiophenes have been investigated by means of combined <em>in situ</em> electron paramagnetic resonance (EPR) and ultraviolet−visible−near infrared (UV−Vis−NIR) spectroelectrochemistry. The molecular structure of the compounds under study contains one or two phenothiazine moieties, which are connected by various thiophene linkers in the case of the latter. The optical and magnetic properties of the radical cations and dications as well as the information about their stability were provided. The impact of the linker structure on charge localization (on phenothiazine or thiophene moiety) for bis-phenothiazinyl-substituted compounds was investigated. The experimental data were supported by density functional theory (DFT) calculations, which predicted the favored charged structures of the studied compounds.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"6 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988148","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 : 2025-01-16DOI: 10.1016/j.electacta.2025.145702
Fatemeh Mahmoudian, Farideh Nabizadeh Chianeh
The present study highlights the importance of anodes in electrocatalytic oxidation processes, with a focus on providing new insights into the modifications of Ti/SnO2 anode to enhance its performance and lifetime service. Modifications with dodecyl sulfate surfactant, silicon carbide nanoparticles, and silica interlayers were thoroughly investigated to achieve this goal. The modified electrodes were thoroughly characterized in terms of morphology, crystalline structure, surface composition, and electrochemical properties. Electrochemical evaluations revealed substantial improvements in oxygen evolution potential, conductivity, service lifetime, and electrocatalytic performance for all modified electrodes. Among the investigated modifications, the Ti/SiO2/SnO2 electrode exhibited the most improvement in all aspect, particularly in charge transfer resistance and service lifetime. Notably, this electrode had a 4.12-fold increase in service lifetime compared to the unmodified Ti/SnO2, making it a very promising candidate for practical applications in electrocatalytic oxidation processes.
{"title":"Enhancing Ti/SnO2 electrodes for electrocatalytic performance: New insights for modifications","authors":"Fatemeh Mahmoudian, Farideh Nabizadeh Chianeh","doi":"10.1016/j.electacta.2025.145702","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145702","url":null,"abstract":"The present study highlights the importance of anodes in electrocatalytic oxidation processes, with a focus on providing new insights into the modifications of Ti/SnO<sub>2</sub> anode to enhance its performance and lifetime service. Modifications with dodecyl sulfate surfactant, silicon carbide nanoparticles, and silica interlayers were thoroughly investigated to achieve this goal. The modified electrodes were thoroughly characterized in terms of morphology, crystalline structure, surface composition, and electrochemical properties. Electrochemical evaluations revealed substantial improvements in oxygen evolution potential, conductivity, service lifetime, and electrocatalytic performance for all modified electrodes. Among the investigated modifications, the Ti/SiO<sub>2</sub>/SnO<sub>2</sub> electrode exhibited the most improvement in all aspect, particularly in charge transfer resistance and service lifetime. Notably, this electrode had a 4.12-fold increase in service lifetime compared to the unmodified Ti/SnO<sub>2</sub>, making it a very promising candidate for practical applications in electrocatalytic oxidation processes.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"54 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986896","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 : 2025-01-15DOI: 10.1016/j.electacta.2025.145676
R Aiswarya, T Kalaivani
Globalization, shifts in mobility, and digitization all contribute to an increase in energy use. Complex networks are now able to provide electricity at anytime and anywhere. However, there is a cost associated with this rise in energy use. Right present, there is an urgent energy demand for supercapacitors of high energy density. This study used the co-precipitation approach to synthesis hierarchical ZnO/GO in the form of flowers. The selection of ZnO/GO were based on its substantial electroactive surface area, shape resembling flowers, and effective pathways for electron transport and ion diffusion within the constructed hierarchical arrays. At 1 A/g, the GO-coated ZnO exhibits a capacitance of around 683.21 F/g. Fundamental investigations have proven that a synergistic impact between the hierarchical ZnO/GO nano-flower and GO nano-sheets helps to large surface area & outstanding transport characteristics. As a result, when used as an electrode in supercapacitors has more active sites and intercalation of ions, ZnO/GO hierarchical structures have shown an exceptional specific capacitance of 683.21 F/g at 1 A/g. Besides, it demonstrated excellent stability, holding onto its 74.047 % capacitance at 1 A/g even after 5000 cycles. These excellent electrochemical outcomes suggest that ZnO/GO is a good choice for energy storage uses.
{"title":"Facile synthesis of highly porous hierarchical ZnO nano-flowers array over graphene oxide nanocomposite for high performance Supercapacitor applications","authors":"R Aiswarya, T Kalaivani","doi":"10.1016/j.electacta.2025.145676","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145676","url":null,"abstract":"Globalization, shifts in mobility, and digitization all contribute to an increase in energy use. Complex networks are now able to provide electricity at anytime and anywhere. However, there is a cost associated with this rise in energy use. Right present, there is an urgent energy demand for supercapacitors of high energy density. This study used the co-precipitation approach to synthesis hierarchical ZnO/GO in the form of flowers. The selection of ZnO/GO were based on its substantial electroactive surface area, shape resembling flowers, and effective pathways for electron transport and ion diffusion within the constructed hierarchical arrays. At 1 A/g, the GO-coated ZnO exhibits a capacitance of around 683.21 F/g. Fundamental investigations have proven that a synergistic impact between the hierarchical ZnO/GO nano-flower and GO nano-sheets helps to large surface area & outstanding transport characteristics. As a result, when used as an electrode in supercapacitors has more active sites and intercalation of ions, ZnO/GO hierarchical structures have shown an exceptional specific capacitance of 683.21 F/g at 1 A/g. Besides, it demonstrated excellent stability, holding onto its 74.047 % capacitance at 1 A/g even after 5000 cycles. These excellent electrochemical outcomes suggest that ZnO/GO is a good choice for energy storage uses.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"4 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986898","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 : 2025-01-15DOI: 10.1016/j.electacta.2025.145673
P. Wu, S. Touhami, W. Aït-Idir, H. Yelloz, C. Marty, F. Micoud, J. Dillet, O. Lottin, J. Mainka
This work presents a case study on the use of three hybrid algorithms combining a stochastic part -Genetic Algorithms (GA), Particle Swarm Optimization (PSO), or Simulated Annealing (SA)- with a deterministic Nelder-Mead (NM) algorithm for the estimation of the equivalent electrical circuit (EEC) parameters for the interpretation of Proton Exchange Membrane Fuel Cell (PEMFC) impedance data. These hybrid methods were evaluated on mathematical test functions as well as for the interpretation of simulated and experimental PEMFC impedance spectra using EEC of different complexity.The three stochastic/deterministic methods were compared in terms of stability, efficiency, ability to explore multiple solutions, and computing resources. The results showed that all hybrid methods were able to improve the interpretation of experimental EIS data by identifying satisfying and physically meaningful solutions, with low least-square residuals and by reducing the sensitivity to initial conditions while accelerating convergence. All methods allowed an improvement compared to the use of one single type of algorithm alone -deterministic and stochastic.
{"title":"Hybrid stochastic-deterministic algorithms for the interpretation of Electrochemical Impedance Spectroscopy spectra of Proton Exchange Membrane Fuel Cells","authors":"P. Wu, S. Touhami, W. Aït-Idir, H. Yelloz, C. Marty, F. Micoud, J. Dillet, O. Lottin, J. Mainka","doi":"10.1016/j.electacta.2025.145673","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145673","url":null,"abstract":"This work presents a case study on the use of three hybrid algorithms combining a stochastic part -Genetic Algorithms (GA), Particle Swarm Optimization (PSO), or Simulated Annealing (SA)- with a deterministic Nelder-Mead (NM) algorithm for the estimation of the equivalent electrical circuit (EEC) parameters for the interpretation of Proton Exchange Membrane Fuel Cell (PEMFC) impedance data. These hybrid methods were evaluated on mathematical test functions as well as for the interpretation of simulated and experimental PEMFC impedance spectra using EEC of different complexity.The three stochastic/deterministic methods were compared in terms of stability, efficiency, ability to explore multiple solutions, and computing resources. The results showed that all hybrid methods were able to improve the interpretation of experimental EIS data by identifying satisfying and physically meaningful solutions, with low least-square residuals and by reducing the sensitivity to initial conditions while accelerating convergence. All methods allowed an improvement compared to the use of one single type of algorithm alone -deterministic and stochastic.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"12 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142981560","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 : 2025-01-15DOI: 10.1016/j.electacta.2025.145710
Begoña Molinero-Abad, Maria Trachioti, Mamas I. Prodromidis, Olga Domínguez-Renedo, M. Asunción Alonso-Lomillo
The evaluation of different gold nanoparticles (AuNPs) modified screen-printed carbon electrodes (SPCEs) for the determination of ethanethiol in wine is presented in this work. Two procedures, electrochemical and spark discharge modification, have been tested for depositing AuNPs onto the working electrode surface. A gel polymer membrane, based on the mixture of 1-n-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6) and poly(vinylidene fluoride) (PVDF) in dimethyl sulfoxide, has been incorporated as a supporting electrolyte for the amperometric determination of the analyte in the gas phase. The developed sensors demonstrated high selectivity and sensitivity, having a detection capability of 80 μg/L (α = β = 0.05). They also exhibited a high degree of precision, with reproducibility values ranging from 0.3 to 7.6 %. The different AuNP/SPCEs integrating a gel polymer membrane electrolyte have been successfully applied to the headspace amperometric determination of ethanethiol in various wine samples.
{"title":"Gold nanoparticle-based amperometric sensors integrating a gel polymer membrane electrolyte for the headspace determination of ethanethiol in wines","authors":"Begoña Molinero-Abad, Maria Trachioti, Mamas I. Prodromidis, Olga Domínguez-Renedo, M. Asunción Alonso-Lomillo","doi":"10.1016/j.electacta.2025.145710","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145710","url":null,"abstract":"The evaluation of different gold nanoparticles (AuNPs) modified screen-printed carbon electrodes (SPCEs) for the determination of ethanethiol in wine is presented in this work. Two procedures, electrochemical and spark discharge modification, have been tested for depositing AuNPs onto the working electrode surface. A gel polymer membrane, based on the mixture of 1-n-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF<sub>6</sub>) and poly(vinylidene fluoride) (PVDF) in dimethyl sulfoxide, has been incorporated as a supporting electrolyte for the amperometric determination of the analyte in the gas phase. The developed sensors demonstrated high selectivity and sensitivity, having a detection capability of 80 μg/L (α = β = 0.05). They also exhibited a high degree of precision, with reproducibility values ranging from 0.3 to 7.6 %. The different AuNP/SPCEs integrating a gel polymer membrane electrolyte have been successfully applied to the headspace amperometric determination of ethanethiol in various wine samples.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"92 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142981562","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 : 2025-01-15DOI: 10.1016/j.electacta.2025.145667
Ruonan Jin, Qingqing Lu, Junjie Liao, Yuzhou Zhu, Tao Huang, Wenhui Wang, Yuheng Wu, Hamilton Varela, Kamel Eid
The authors regret < 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 (491KB)
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 and 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.2025.145667","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.145667","url":null,"abstract":"The authors regret < <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=\"358\" src=\"https://ars.els-cdn.com/content/image/1-s2.0-S0013468625000301-gr1.jpg\"/><ol><li><span><span>Download: <span>Download high-res image (491KB)</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 and 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":"30 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986897","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 : 2025-01-14DOI: 10.1016/j.electacta.2024.145622
G. Kavitha, M. Karunakaran
In recent years, REM-doped CuO:CdTe thin film materials have been extensively investigated as catalytic materials for energy and environmental applications due to their easy manipulation, scalability, low cost, and abundance. In the present study, REM-doped CuO:CdTe thin films were successfully synthesized via chemical vapor deposition at 450°C for solar-driven hydrogen (H₂) production through water splitting. XRD pattern confirmed the phase formation of CuO:CdTe thin film. The absorption spectra of REM-doped CuO:CdTe thin films exhibited a red shift in the visible region, attributed to enhanced bandgap energies resulting from the smaller particle size. In terms of photoelectrochemical (PEC) properties, REM-doped CuO:CdTe thin films demonstrated a superior photocurrent response compared to pure CuO and CdTe thin films, likely due to improved charge transfer at the electrode-electrolyte interface. These findings suggest that REM-doped CuO:CdTe thin films possess highly efficient configurations as photocatalysts and photoelectrodes, making them promising candidates for water splitting applications.
近年来，REM掺杂的CuO:CdTe薄膜材料因其易于操作、可扩展性、低成本和丰富性而被广泛研究用作能源和环境应用的催化材料。在本研究中，通过 450°C 化学气相沉积法成功合成了掺杂 REM 的 CuO:CdTe 薄膜，用于太阳能驱动的水分离制氢（H₂）。XRD 图谱证实了 CuO:CdTe 薄膜的相形成。掺杂了 REM 的 CuO:CdTe 薄膜的吸收光谱在可见光区域表现出红移，这归因于较小的颗粒尺寸增强了带隙能量。在光电化学（PEC）特性方面，与纯 CuO 和 CdTe 薄膜相比，掺杂 REM 的 CuO:CdTe 薄膜表现出更优越的光电流响应，这可能是由于电极-电解质界面的电荷转移得到了改善。这些发现表明，掺杂 REM 的 CuO:CdTe 薄膜具有作为光催化剂和光电极的高效配置，使它们成为水分离应用的理想候选材料。
{"title":"Surface oxidation of grown REMs-doped CuO:CdTe thin films heterostructure based photocatalyst and PECs materials for solar-driven water splitting","authors":"G. Kavitha, M. Karunakaran","doi":"10.1016/j.electacta.2024.145622","DOIUrl":"https://doi.org/10.1016/j.electacta.2024.145622","url":null,"abstract":"In recent years, REM-doped CuO:CdTe thin film materials have been extensively investigated as catalytic materials for energy and environmental applications due to their easy manipulation, scalability, low cost, and abundance. In the present study, REM-doped CuO:CdTe thin films were successfully synthesized via chemical vapor deposition at 450°C for solar-driven hydrogen (H₂) production through water splitting. XRD pattern confirmed the phase formation of CuO:CdTe thin film. The absorption spectra of REM-doped CuO:CdTe thin films exhibited a red shift in the visible region, attributed to enhanced bandgap energies resulting from the smaller particle size. In terms of photoelectrochemical (PEC) properties, REM-doped CuO:CdTe thin films demonstrated a superior photocurrent response compared to pure CuO and CdTe thin films, likely due to improved charge transfer at the electrode-electrolyte interface. These findings suggest that REM-doped CuO:CdTe thin films possess highly efficient configurations as photocatalysts and photoelectrodes, making them promising candidates for water splitting applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"90 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974597","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}
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