ChemElectroChem最新文献_第10页

Redox−Acid/Base Phase Diagrams as an Entry to Computational Redox Chemistry 氧化还原酸碱相图作为计算氧化还原化学的切入点

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-10-02 DOI: 10.1002/celc.202400301

Patrick M. Becker, Katja Heinze, Biprajit Sarkar, Johannes Kästner

{"title":"Redox−Acid/Base Phase Diagrams as an Entry to Computational Redox Chemistry","authors":"Patrick M. Becker, Katja Heinze, Biprajit Sarkar, Johannes Kästner","doi":"10.1002/celc.202400301","DOIUrl":"https://doi.org/10.1002/celc.202400301","url":null,"abstract":"The rapid depletion of fossil fuels and the change from conventional energy supply to so-called sustainable and renewable energy sources have led to a renaissance of electrochemical, photochemical, and photoelectrochemical methods for chemical synthesis. While drastic experimental improvements have been realized in recent years, systematic computational studies of these types of reactions are, however, rather limited caused by a lack of suitable representations. Herein we present a generalized method to investigate and analyze a chemical system with respect to its redox- and acid/base-properties based on Gibbs free-energy differences. We represent the results in a clear manner by means of redox−acid/base phase diagrams. Motivated by computational needs, the presented method is a direct link between experimentally measurable values and Gibbs free-energy profiles, connecting experiment and simulation. Thus, it serves as an entry to systematic computational studies of reactions, which involve a combination of electron transfers and acid/base-chemical reaction steps, because it enables the representation of both thermodynamic and kinetic properties. The presented method is applied to four exemplary systems: Phenol, dicobaltocenium amine as a proton-coupled electron transfer (PCET) reactant, and two porphyrin NiII catalysts for the electrocatalytic hydrogen evolution reaction (HER).","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Linker Group on Bipolar Redox-Active Molecule Performance in Non-Aqueous Redox Flow Batteries 链接基团对非水性氧化还原流电池中双极氧化还原活性分子性能的影响

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-10-02 DOI: 10.1002/celc.202400450

Samantha Macchi, Chad L. Staiger, Jesse Cordova, Cassandria Poirier, Travis M. Anderson

{"title":"Influence of Linker Group on Bipolar Redox-Active Molecule Performance in Non-Aqueous Redox Flow Batteries","authors":"Samantha Macchi, Chad L. Staiger, Jesse Cordova, Cassandria Poirier, Travis M. Anderson","doi":"10.1002/celc.202400450","DOIUrl":"https://doi.org/10.1002/celc.202400450","url":null,"abstract":"Redox flow batteries (RFBs) are an attractive choice for stationary energy storage of renewables such as solar and wind. Non-aqueous redox flow batteries (NARFBs) have garnered broad interest due to their high voltage operation compared to their aqueous counterparts. Further, the utilization of bipolar redox-active molecules (BRMs) is a practical way to alleviate crossover faced by asymmetric RFBs. In this work, ferrocene (Fc) and phthalimide (PI) are covalently linked with various tethering groups which vary in structure and length. The compiled results suggest that the length and steric shielding ability of the linker group can greatly influence the stability and overall performance of Fc-n-PI BRM-based NARFBs. Primary sources of capacity loss are found to be BRM degradation for straight chain spacers <6 carbons and membrane (Nafion) fouling. Fc-hexyl-PI provided the most stable battery cycling and coulombic efficiencies of >98 % over 100 cycles (~13 days). NARFB using Fc-hexyl-PI as an active material exhibited high working voltage (1.93 V) and maximum capacity (1.28 Ah L−1). Additionally, this work highlights rational strategies to improve cycling stability and optimize NARFB performance.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400450","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Molecular Weight and End Groups on Ion Transport in Weakly and Strongly Coordinating Polymer Electrolytes 分子量和端基对弱配位和强配位聚合物电解质中离子迁移的影响

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-10-02 DOI: 10.1002/celc.202400415

Rassmus Andersson, Samuel Emilsson, Guiomar Hernández, Mats Johansson, Jonas Mindemark

{"title":"Influence of Molecular Weight and End Groups on Ion Transport in Weakly and Strongly Coordinating Polymer Electrolytes","authors":"Rassmus Andersson, Samuel Emilsson, Guiomar Hernández, Mats Johansson, Jonas Mindemark","doi":"10.1002/celc.202400415","DOIUrl":"https://doi.org/10.1002/celc.202400415","url":null,"abstract":"In the development of polymer electrolytes, the understanding of the complex interplay of factors that affect ion transport is of importance. In this study, the strongly coordinating and flexible poly (ethylene oxide) (PEO) is compared to the weakly coordinating and stiff poly (trimethylene carbonate) (PTMC) as opposing model systems. The effect of molecular weight (Mn) and end group chemistry on the physical properties: glass transition temperature (Tg) and viscosity (η) and ion transport properties: transference number (T+), ion coordination strength and ionic conductivities were investigated. The cation transference number (T+) showed the opposite dependence on Mn for PEO and PTMC, decreasing at low Mn for PTMC and increasing for PEO. This was shown to be highly dependent on the ion coordination strength of the system regardless of whether the end group was OH or if the chains were end-capped. Although the coordination is mainly of the cations in the systems, the differences in T+ were due to differences in anion rather than cation conductivity, with a similar Li+ conductivity across the polymer series when accounting for the differences in segmental mobility.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400415","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Composite PEDOT:PSS-PEO Layers for Improving Lithium Batteries** 用于改进锂电池的 PEDOT:PSS-PEO 复合层**

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-10-02 DOI: 10.1002/celc.202400458

Timothy G. Ritter, Yong Il Kim, Breno Bezerra De Souza, Xinnian Wang, Yayue Pan, Vitaliy Yurkiv, Alexander L. Yarin, Reza Shahbazian-Yassar

{"title":"Composite PEDOT:PSS-PEO Layers for Improving Lithium Batteries**","authors":"Timothy G. Ritter, Yong Il Kim, Breno Bezerra De Souza, Xinnian Wang, Yayue Pan, Vitaliy Yurkiv, Alexander L. Yarin, Reza Shahbazian-Yassar","doi":"10.1002/celc.202400458","DOIUrl":"https://doi.org/10.1002/celc.202400458","url":null,"abstract":"This work investigates the application of poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS) with polyethylene oxide (PEO) in lithium batteries (LIBs). This composite film comprising PEDOT:PSS and PEO was 3D printed onto a carbon nanofiber (CNF) substrate to serve as a layer between the polypropylene (PP) separator and the lithium anode in LIBs. The resulting CNF-PEDOT:PSS-PEO film exhibited superior mechanical and thermal properties compared to conventional PP separators. Mechanical tests revealed a high Young's modulus and puncture strength for the composite film. Thermal stability tests indicated that the CNF-PEDOT:PSS-PEO film remained stable at higher temperatures compared to the commercial PP separator, and combustion tests confirmed its superior fire-resistance properties. In terms of conductivity, the composite film maintained comparable ionic conductivity to the commercial PP separator. Electrochemical tests demonstrated that LIBs incorporating the CNF-PEDOT:PSS-PEO film exhibited slight improvement in cycling performance, with a 7.9 % increase in long-term cycling capacity compared to LIBs using only the commercial PP separator. These findings indicate that the developed CNF-PEDOT:PSS-PEO composite film holds promise to improve safety, while maintaining the electrochemical performance of LIBs by reducing dendrite formation and enhancing thermal stability.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400458","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Front Cover: Detection of Micromolar Glucose Levels in Human Sweat Using an Organic Transistor-Based Enzymatic Sensor (ChemElectroChem 19/2024) 封面：利用基于有机晶体管的酶传感器检测人体汗液中的微摩尔葡萄糖水平（ChemElectroChem 19/2024）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-30 DOI: 10.1002/celc.202481901

Dr. Yui Sasaki, Kohei Ohshiro, Miyuki Kato, Dr. Daijiro Haba, Prof. Dr. Gojiro Nakagami, Prof. Dr. Tsuyoshi Minami

引用次数: 0

Structure and Conductivity of Crosslinked Ca-POE Polymer Electrolytes for Secondary Batteries 用于二次电池的交联 Ca-POE 聚合物电解质的结构和电导率

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-27 DOI: 10.1002/celc.202400315

Dr. Federico Brombin, Dr. Gioele Pagot, Prof. Keti Vezzù, Dr. Raul San Roman, Prof. Cynthia Susana Martinez Cisneros, Dr. Nieves Ureña, Prof. Alejandro Varez, Prof. Jean-Yves Sanchez, Prof. Vito Di Noto

{"title":"Structure and Conductivity of Crosslinked Ca-POE Polymer Electrolytes for Secondary Batteries","authors":"Dr. Federico Brombin, Dr. Gioele Pagot, Prof. Keti Vezzù, Dr. Raul San Roman, Prof. Cynthia Susana Martinez Cisneros, Dr. Nieves Ureña, Prof. Alejandro Varez, Prof. Jean-Yves Sanchez, Prof. Vito Di Noto","doi":"10.1002/celc.202400315","DOIUrl":"https://doi.org/10.1002/celc.202400315","url":null,"abstract":"Poly(oxyethylene) (POE) is frequently used as suitable component to prepare solid polymer electrolytes (SPEs), due to its: (i) ability to coordinate and dissociate doping salts; (ii) good mechanical properties; and (iii) high chemical and electrochemical stability. With the aim to obtain calcium secondary batteries, here we describe the preparation and studies of crosslinked Ca-polycondensate (NPCY) electrolytes with formula NPCY/(CaTf2)x based on fragments of POE chains and CaTf2. The molecular weight of POE precursors is Y=400 and 1000 g ⋅ mol−1. The effect of POE molecular weight on the thermal, structural, and electrical properties of NPCY/(CaTf2)x is investigated revealing that in mesoscale this materials show: (i) two different nanodomains with polyether chains both “free” (not coordinating the cation) and involved in 4–4 coordination cages of Ca2+ metal ions; (ii) fα-fast, fα-cross and fα-slow relaxation modes of polyether chains, detected by broadband electrical spectroscopy, which are coupled with the long-range charge migration pathways of SPEs; (iii) that triflate (Tf−) anions, which act as plasticizers, modulate the inter-chain migration processes of Ca2+ between polyether coordination sites. Finally, the conductivity values of NPCY/(CaTf2)x, which is up to 10−4 S ⋅ cm−1 at 80 °C, classify NPCY/(CaTf2)x as promising SPEs for the development of calcium secondary batteries.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400315","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost-Effective Solutions for Lithium-Ion Battery Manufacturing: Comparative Analysis of Olefine and Rubber-Based Alternative Binders for High-Energy Ni-Rich NCM Cathodes 锂离子电池制造的成本效益解决方案：用于高能量富镍 NCM 阴极的烯烃基和橡胶基替代粘合剂的比较分析

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-24 DOI: 10.1002/celc.202400465

Susan Montes, Alexander Beutl, Andrea Paolella, Marcus Jahn, Artur Tron

{"title":"Cost-Effective Solutions for Lithium-Ion Battery Manufacturing: Comparative Analysis of Olefine and Rubber-Based Alternative Binders for High-Energy Ni-Rich NCM Cathodes","authors":"Susan Montes, Alexander Beutl, Andrea Paolella, Marcus Jahn, Artur Tron","doi":"10.1002/celc.202400465","DOIUrl":"https://doi.org/10.1002/celc.202400465","url":null,"abstract":"Promoting safer and more cost-effective lithium-ion battery manufacturing practices, while also advancing recycling initiatives, is intrinsically tied to reducing reliance on fluorinated polymers like polyvinylidene difluoride (PVDF) as binders and minimizing the use of hazardous and expensive solvents such as N-methyl pyrrolidone (NMP). In pursuit of this objective, olefin- and rubber-based polymers have been investigated as promising alternatives for binder materials in high-energy Ni-rich LiNixCoyMnzO2 (NCM, x≥0.8) cathodes for lithium-ion batteries (LIBs). Alternative binders such as polyisobutylene (PIB), poly(styrene-butadiene-styrene) (SBS), nitrile butadiene rubber (NBR), and its hydrogenated version (HNBR) offer versatile solutions. These polymers can be dissolved in industrial solvents, such as toluene, and have been further processed into homogeneous cathode slurries, thus facilitating the manufacturing of high-energy Ni-rich NCM cathodes for lithium-ion batteries. The evaluation of NCM811 cathodes obtained from PIB, SBS, NBR, and HNBR has involved a thorough assessment of their physical and chemical properties, electrochemical performance, and production expenses, compared with NCM811 cathodes based on PVDF. Notably, cathodes employing PIB and HNBR have exhibited outstanding qualities, showcasing high specific capacity and remarkable electrochemical stability akin to PVDF-based counterparts. Furthermore, the alternative binders′ superior adhesion, elasticity, and thermal stability have facilitated obtaining uniform and mechanically stable cathode films. Furthermore, using toluene, with its low vapor pressure, has significantly reduced energy costs associated with drying processes, thereby enhancing the overall cost-effectiveness of the NCM811 cathodes.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 21","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in 3D Materials-Based Hydrovoltaic Generators and Synergistic Energy Conversion 基于三维材料的水力发电机和协同能源转换的进展

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-23 DOI: 10.1002/celc.202400330

Kai Jiao, Boxuan Ma, Xinxi Liu, Bohao Chen, Qiuwang Wang, Cunlu Zhao

{"title":"Advances in 3D Materials-Based Hydrovoltaic Generators and Synergistic Energy Conversion","authors":"Kai Jiao, Boxuan Ma, Xinxi Liu, Bohao Chen, Qiuwang Wang, Cunlu Zhao","doi":"10.1002/celc.202400330","DOIUrl":"https://doi.org/10.1002/celc.202400330","url":null,"abstract":"Covering approximately 71 % of Earth's surface and absorbing almost 70 % of the solar radiation energy, water presents a tremendous opportunity for hydropower generation, revealing considerable promise for future applications. Benefited from the low cost, negligible pollution, and the characteristic of solely utilizing ambient thermal energy, hydrovoltaic (HV) technology has garnered significant attention in recent years for its substantial contributions to energy harvesting and conversion. While traditional hydrovoltaic generators (HVGs) have predominantly utilized two-dimensional (2D) structures, the emergence of three-dimensional (3D) HV materials signifies a pivotal shift due to superior specific surface areas, intricate porous architectures and enhanced mechanical strength. Herein, we summarized the development of 3D HVGs, categorizing them into flow-induced, moisture-induced, and evaporation-induced types. We explored their working mechanisms, evolutions, strategies for electricity output enhancement and the limitations they face. Moreover, we discussed the integration of HVGs with other energy conversion technologies and the development of comprehensive HVG systems that exploit various water sources for energy generation. At last, we highlighted the challenges confronting 3D HVGs and anticipated future directions for this burgeoning field.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

H/D Isotope Effects in the Electrochemistry of Electrochromic Iron Hexacyanoruthenate 电致变色六氰钌酸铁电化学中的 H/D 同位素效应

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-23 DOI: 10.1002/celc.202300824

Lena Gerhards, Izabella Brand, Gunther Wittstock

{"title":"H/D Isotope Effects in the Electrochemistry of Electrochromic Iron Hexacyanoruthenate","authors":"Lena Gerhards, Izabella Brand, Gunther Wittstock","doi":"10.1002/celc.202300824","DOIUrl":"https://doi.org/10.1002/celc.202300824","url":null,"abstract":"The electrochemical deposition of iron hexacyanoruthenate (Fe−HCR) on gold electrodes was studied in electrolytes prepared with light and heavy water. Cyclic voltammetry of the material during preparation and after transfer to a precursor-free solution exhibits two reductions peaks in H2O-based electrolytes but only one reduction peak in D2O-based electrolytes. The voltammetric behavior changes reversibly upon transfer of the material between D2O-based and H2O-based 1 mol L−1 KCl solutions. No clear structural differences between samples prepared in D2O and H2O were detected by means of X-ray photoelectron spectroscopy (XPS) and polarization modulation infrared reflection absorption spectroscopy (PM IRRAS). We noted a relatively slow exchange of coordinated water and a fast exchange of zeolitic water. Using voltammetric experiments we could rule out simple effects of solution conductivity for K+, participation of H+/D+ in the charge compensation and surface effects on the observed dependence of the peak splitting on the isotopic composition of the solvent. The most likely reason for the observed behavior is the different structure of the H-bonded water network of coordinated H2O and zeolitic H2O/D2O which is supported by the PM IRRAS data.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202300824","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transpassive Behavior of Equimolar CrMnFeCoNi and CrCoNi Multi-Principal Element Alloys in an Alkaline NaCl Electrolyte 等摩尔铬锰铁合金和铬钴镍多元素合金在碱性氯化钠电解液中的渗透行为

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-09-20 DOI: 10.1002/celc.202400346

Annica Wetzel, Daniel Morell, Marcus von der Au, Julia Witt, Ozlem Ozcan

{"title":"Transpassive Behavior of Equimolar CrMnFeCoNi and CrCoNi Multi-Principal Element Alloys in an Alkaline NaCl Electrolyte","authors":"Annica Wetzel, Daniel Morell, Marcus von der Au, Julia Witt, Ozlem Ozcan","doi":"10.1002/celc.202400346","DOIUrl":"https://doi.org/10.1002/celc.202400346","url":null,"abstract":"We investigated the corrosion properties and transpassive behavior of CrMnFeCoNi and CrCoNi multi-principal element alloys (MPEAs) in a 0.1 M NaCl electrolyte at pH 12. By using SECM-based tip substrate voltammetry (TSV) in combination with the chemical analysis of the electrolyte, we were able to differentiate between anodic metal dissolution and oxygen evolution in the transpassive range. Our investigations have shown that CrCoNi has a significantly higher corrosion resistance compared to CrMnFeCoNi. In the studied alkaline environment, a transpassive oxide film is formed on the surface of CrCoNi during secondary passivation. This transpassive oxide film appears to play a significant role in oxygen evolution, as the increase in TSV currents at the microelectrode coincides with the corresponding current density plateau of the voltametric current trace. The formation of the transpassive oxide film was not observed in previous studies conducted in acidic environments. Moreover, the alkaline electrolyte induced a positive hysteresis and mild pitting corrosion, in addition to intergranular corrosion, which was the sole corrosion process observed at acidic pH levels. These findings enhance the understanding of the processes governing the transpassivity of CrMnFeCoNi and CrCoNi MPEAs in alkaline environments and have potential implications for the development of application-tailored corrosion-resistant MPEAs.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 20","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0