Electrochimica Acta最新文献

{"title":"Calendar ageing without applying potential for polypyrrole/Ni-oxide supercapacitors","authors":"Dilek Vatansever, Murside Haciismailoglu","doi":"10.1016/j.electacta.2025.146748","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146748","url":null,"abstract":"Polypyrrole (PPy) was electropolymerized on disposable pencil graphite (G), and then Ni-oxide (NiO) was electrodeposited on G/PPy varying the charge density from 14 to 562 mC/cm². The molecular structure was studied by Fourier transform infrared spectroscopy. The morphology was investigated by scanning electron microscopy and the composition was determined by energy-dispersive X-ray spectrometry. The capacitive behavior was examined by cyclic voltammetry (CV) and galvanostatic charge-discharge technique (GCD). The specific capacitance was calculated as 570.4 F/g for the G/PPy-NiO electrode having NiO with a charge density of 14 mC/cm². As the charge density increases the specific capacitance decreases. Supercapacitors were fabricated using these G/PPy-NiO electrodes, and PVA-H₂SO₄ and PVA-H₃PO₄ gel electrolytes. The capacitive behavior was analyzed using CV and GCD. The calculated specific capacitance is 403.4 F/g for the PPy-NiO-14//PVA-H₂SO₄//PPy-NiO-14 and 44.4 F/g for PPy-NiO-14//PVA-H₃PO₄//PPy-NiO-14 supercapacitors. The devices were aged by keeping them at room conditions, and the measurements were repeated every 15 days until the 45^th day. The cyclic stability was determined after 1000 cycles by CV measured on the 0^th and 45^th day. The capacitance retention and hence the shelf life were determined. PPy-NiO-14//PVA-H₂SO₄//PPy-NiO-14 supercapacitor has capacitance retention (c.t.) of 101% after 45 days while the PPy-NiO-14//PVA-H₃PO₄//PPy-NiO-14 has 75.5%.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"16 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337587","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}

{"title":"Eco-friendly electrochemical polishing of stainless steel using a NaCl-based electrolyte to reduce deterioration in seawater","authors":"H.V. Suárez-Miranda, G. Vargas-Gutiérrez, F. Martinez-Baltodano, W.J. Pech-Rodríguez","doi":"10.1016/j.electacta.2025.146751","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146751","url":null,"abstract":"One of the most significant technological challenges in implementing ocean energy conversion systems is ensuring the reliability and extending the service life of their components. Stainless steel has found widespread use in marine applications; however, it is susceptible to localized corrosion, erosion, and biocorrosion when exposed to seawater. In response to these challenges, selective electrodissolution has emerged as a promising strategy. Typically, the standard electrodissolution procedure is performed with acid-based electrolytes, generating environmental and safety problems. In this research, green electrolytes composed of ethylene glycol, sodium chloride, and water were used to selectively modify the surface of AISI 304 SS. Electrochemical behavior, wettability properties, surface characteristics, and corrosion resistance in simulated seawater were evaluated using cyclic voltammetry, contact angle, scanning electron microscopy and cyclic potentiodynamic polarization techniques, respectively. The anodic dissolution tests and their corresponding analysis indicated that the best surface modification was achieved by a potential of 4.0 V, a treatment time of 30 min, and an electrolyte of 10 wt. % NaCl, 67 wt. % EG and 23 wt. % H₂O. Under these conditions, a hydrophobic surface was obtained, with a 72.2 % increase in resistance to pitting corrosion and a 71.8 % reduction in the general corrosion rate compared to untreated AISI 304. The incorporation of H₂O into the EG solvent enhanced the selectivity of its electrodissolution process, reducing energy consumption and operational costs while increasing the environmental friendliness of the electrolyte.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"8 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337586","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}

{"title":"Effect of Hydrophobic Butyl Group on the Physicochemical properties of Anion Exchange Membranes based on Polyketone PB-FPKKf/f′(X)g Copolymer","authors":"Afaaf Rahat Alvi, Keti Vezzu, Paolo Sgarbossa, Gioele Pagot, Angeloclaudio Nale, Vito Di Noto","doi":"10.1016/j.electacta.2025.146752","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146752","url":null,"abstract":"In this report, anion exchange membranes based on poly[(N-(1,4-dimethyl piperaziniumethyl)-ethylenepyrrole)(X)/ethyleneketone/propyleneketone/N-(n-butyl)ethylenepyrrole], where X = I⁻ or OH⁻, terpolymer are prepared by converting the 1,4-diketonic groups of an aliphatic poly[ethylene ketone/propylene ketone] (PKK) into pyrrole substituted repeat units through a Paal-Knorr reaction. These materials are prepared by co-reacting 1-(2-aminoethylpiperazine) and n-butylamine in different amines/PKK molar ratios to investigate the effect of varying degree of functionalization (<em>f</em>) and the incorporation of hydrophobic butyl pendant groups on the physicochemical properties of the membranes. The molecular structure and composition of the membranes are confirmed by ATR-FTIR and CHNS/O elemental analysis, while their electrochemical and physical properties are characterized through evaluation of water uptake (WU%), ion exchange capacity (IEC), thermal stability, ionic conductivity, and alkaline stability. BES studies reveal ionic conductivity values of 0.49 and 0.87 mS cm⁻¹ at 50 °C for the membranes in iodide and hydroxide form, respectively. The membrane PB-FPKK_0.47/_0.04(OH)_0.43 demonstrates an exceptional chemical stability for 720 hours at 45 °C in 1M KOH aqueous solution.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"9 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144340859","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}

{"title":"Enhanced CO2 electrolysis performance of medium-entropy perovskite cathode through in situ exsolution of Co nanoparticles","authors":"Ping Li, Jiaxing Shang, Zongshang Wang, Haiqing Wu, Fei Yan, Xiaofeng Tong, Tian Gan, Ligang Wang","doi":"10.1016/j.electacta.2025.146749","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146749","url":null,"abstract":"To reduce CO₂ emissions and promote the use of sustainable energy, solid oxide electrolysis cell (SOEC) technology can effectively convert CO₂ into CO, and the choice of cathode material has a crucial impact on the electrolysis performance. In this work, we prepare a novel medium-entropy perovskite cathode material Pr_0.4Ba_0.2Ca_0.2La_0.2Co_0.2Fe_0.8O₃ (PBCLCF) and further improve its catalytic performance through the in situ exsolution strategy. After reduction at 700 °C, Co nanoparticles are adhered to the surface of the PBCLCF perovskite matrix. The electrolysis performance results reveal that when the reduced PBCLCF is used as the cathode, the current density of the single cell reaches ∼1700 mA·cm^-2 at 800 °C/1.5 V for CO₂ electrolysis, which is 1.41 times the electrolysis performance of the single cell using PBCLCF as the cathode. Subsequently, when the reduced PBCLCF is used as the cathode for co-electrolysis of 30%H₂O-70%CO₂, the current density of the single cell at 800 °C/1.5 V reaches ∼1900 mA·cm^-2, which is 46% higher than that of the single cell using PBCLCF as the cathode. Furthermore, after 45 h stability test, no significant performance degradation is observed for both CO₂ electrolysis and H₂O-CO₂ co-electrolysis. The exsolution of Co nanoparticles effectively improve the CO₂ adsorption capacity and enhance the concentration of oxygen vacancy, thereby improving the oxygen migration capacity of PBCLCF and promoting the progress of electrochemical reduction reaction. This work provides new insights for the design and development of novel cathode materials for SOEC.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"9 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337588","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}

{"title":"Graphite braced Multi-scale Porous SiOC/Sn Ceramics as Novel Anode Materials for Lithium-Ion Batteries","authors":"Yiling Quan, Xiwen Xia, Peifeng Feng, Wanru Lin, Xuedong Wu, Mingguang Zhang, Kun Liang, Yujie Song, Xigao Jian, Jian Xu","doi":"10.1016/j.electacta.2025.146642","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146642","url":null,"abstract":"To improve the conductivity and porosity of polymer derived SiOC ceramics, we incorporated graphite into the Sn-containing SiOC precursor (SG), thereby constructing multiscale porous architectures. The introduction of graphite has a dual effect. Firstly, it stabilizes the foam structure of the polymer, and secondly, it acts as a carbon source, promoting the carbothermal reduction of Sn oxide, releasing more gas, and leading to the formation of micropores. As a result, the specific surface area increases from 31 m² g^-1 to 68 m² g^-1. The excellent electrical conductivity of graphite and the more stable porous structure brought by the introduction of graphite enhanced the electrochemical performance of the material as an anode, enabling SG to exhibit a high specific capacity of 412.3 mA h g^-1 at 1 A g^-1 while maintaining an outstanding rate performance. Moreover, the material retains a capacity of 341.3 mA h g^-1 even after enduring 1000 cycles at a current density of 1 A g^-1, demonstrating remarkable cycling stability. The integration of polymer-derived SiOC ceramics with graphite to construct a multi-scale porous strategy paves the way for the practical use of advanced lithium-ion batteries.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"244 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337590","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}

{"title":"Molecular Perspectives on the Multilayered Polyelectrolyte-Based Electrodes Performance in Supercapacitors","authors":"Samyabrata Chatterjee, Monojit Chakraborty","doi":"10.1016/j.electacta.2025.146745","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146745","url":null,"abstract":"The layer-by-layer (LBL) deposition of polyelectrolytes presents a promising approach for designing advanced electrode materials for energy storage devices such as supercapacitors. This study employs coarse-grained molecular dynamics (CGMD) simulations to investigate LBL polyelectrolyte-based electrodes' structural formation and electrochemical performance in supercapacitor applications. The impact of polyelectrolyte ionization degree on multilayer formation, interdiffusion, and stratification is systematically analyzed. The findings reveal that a higher degree of ionization leads to enhanced layer separation and surface charge density, significantly influencing the electrical double-layer (EDL) formation and charge storage capability in supercapacitors. Electrochemical analyses, including charge density profiles, electrostatic potential distributions, and integral capacitance calculations, demonstrate that electrodes with higher degrees of ionization exhibit increased capacitance and energy density. Additionally, variations in electrolyte ion size impact charge accumulation and EDL thickness, influencing the overall supercapacitor performance. The study provides critical insights into the molecular mechanisms governing LBL-assembled polyelectrolyte electrodes and establishes guidelines for optimizing electrode design for next-generation energy storage technologies.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"14 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335425","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}

{"title":"Highly Selective and Stable RuP2-MnP-NPC/CP Nanocomposite as Electrocatalyst for Nitrate Reduction to Ammonia","authors":"Ya-Fei Guo, Sajid Mahmood, Anum Bilal, Noshin Afsan, Noor Hassan, Ali Bahadur, Shahid Iqbal, Syed Kashif Ali, Ahmad Asimov, M. Alhabradi, M. Alruwaili, Nouf M. Alyami, Abd-ElAziem Farouk, Peter Kasak","doi":"10.1016/j.electacta.2025.146747","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146747","url":null,"abstract":"A significant challenge in the ecological production of ammonia (NH₃) as well as the mitigation of H₂O pollution lies in formulating robust electrocatalysts capable of facilitating the electrochemical reduction of nitrate while exhibiting high stability. An electrocatalyst characterized by high activity and durability was synthesized via pyrolysis to improve the efficiency of electrocatalytic nitrate reduction. This catalyst is composed of nanostructured ruthenium and manganese phosphide (RuP₂-MnP) nanocomposites integrated within nitrogen- and phosphorus-doped carbon (NPC) and affixed onto carbon paper (CP). Characterization results substantiate the formation of the nanostructured RuP₂-MnP-NPC and elucidate robust synergistic interactions among RuP₂, MnP, and NPC. Such interactions aid in the considerable increase in the overall catalytic sites, along with the improvement in electrical conductivity. By achieving a yield rate of ammonia of 1.67 mmol h^-1 cm^-2 and a Faradaic efficiency (FE) of 89.64% at -1.6 V vs. SCE, the as-synthesized nanocomposite exhibits exceptional effectiveness in the electrocatalytic nitrate (NO₃⁻) reduction. Moreover, significant durability and prolonged stability were exhibited by the RuP₂-MnP-NPC/CP nanocomposite. Findings of a study involving isotope labeling procedures have been conducted, which indicated ammonia production was because of nitrate reduction. The RuP₂-MnP-NPC nanocomposite is an effective electrocatalyst for treating nitrate-polluted wastewater to efficiently extract ammonia. Aimed at various industrial purposes, this retrieved ammonia can successively be used, emphasizing the adaptability and efficacy of the nanocomposite in addressing environmental contaminants.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"17 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337591","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}

{"title":"Annealing condition engineering of electrospun iron-titanium oxide nanofibers for enhanced lithium storage performance","authors":"Lisha Zhang, Fei Xie, Shujin Hao, Feiyu Diao, Yiqian Wang","doi":"10.1016/j.electacta.2025.146746","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146746","url":null,"abstract":"Iron/titanium-based oxide compounds have garnered significant attention for their promising applications in lithium-ion batteries. To implement this, a large-scale fabrication technique such as electrospinning has become pivotal for the preparation of one-dimensional iron/titanium-based oxide nanocomposites. However, there exists a notable gap in understanding the influence of annealing conditions on the structure, morphology and electrochemical properties of resultant products. In this work, iron-titanium-based oxide nanofibers are produced <em>via</em> electrospinning followed by subsequent annealing, and the influence of annealing atmospheres on the products is systematically investigated. When annealed at 600°C in an argon atmosphere, the product is carbon nanofibers loaded with FeTiO₃ and Fe₃O₄ nanoparticles (FeTiO₃/Fe₃O₄/CNFs), while annealing in air the product is carbon nanofibers embedded with Fe₂TiO₅ nanoparticles (Fe₂TiO₅/CNFs). Electrochemical tests demonstrate that FeTiO₃/Fe₃O₄/CNFs maintain a capacity of 395.6 mAh g^-1 after 100 cycles at a current density of 0.2 A g^-1, which is higher than that of Fe₂TiO₅/CNFs (174 mAh g^-1) and Fe₃O₄/CNFs (314 mAh g^-1). Moreover, FeTiO₃/Fe₃O₄/CNFs present a remarkable rate capability, possessing a capacity of 212.1 mAh g^-1 at 2.0 A g^-1. This excellent performance is attributed to the synergistic effect between FeTiO₃ and Fe₃O₄ and buffering effect of the carbon fibers. These findings highlight the significant application potential of iron/titanium oxides in the field of electrochemical energy storage.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"15 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335426","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}

{"title":"High Solid and Conductivity Solid Electrolyte Interface Regulated by Novel SilaBLne Additive for High-Performance Si/C Anode at -20 °C","authors":"Kexuan Jing, Weizong Wang, Shijie Wang, He Ma, Ran Song, Kang Liang, Shujun Cai, Yurong Ren, Jianbin Li, Zhengping Ding","doi":"10.1016/j.electacta.2025.146696","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146696","url":null,"abstract":"With high lithium storage performance and low intercalation/deintercalation potentials, silicon-based anode is one of the most promising anode materials for the development of high-energy density lithium-ion batteries (LIBs). Despite the considerable advances made by Si/C negative electrodes in the commercial field, there remains scope for enhancement in terms of their low-temperature performance. In this work, we put forward a novel additive, which is tetrakis(trimethylsilyl)silane (TTS). Theoretical calculations and differential capacity curves demonstrated that the additive is able to preferentially carbonate solvents for decomposition and that the chemical bonds formed by the breakage facilitated the formation of surface films. The incorporation of O-Si-C-rich structures into solid electrolyte interface (SEI) film allows for the attainment of better mechanical properties and high ionic conductivity. The particular SEI is capable of tolerating significant alterations in the volume of Si/C anode particles, thereby preventing the irreversible depletion of lithium ions and electrolytes. Thus, the Si/C half-cell with TTS additive exhibits higher reversible capacity (582.1 mAh g^-1 at room temperature, 212.3 mAh g^-1 at -20°C), high-rate performance (440.3 mAh g^-1 at 2 C), and excellent capacity retention (76.2% after 150 cycles at room temperature, 77.9% after 200 cycles at -20°C). Furthermore, our research explores the impact of TTS on the formation of amorphous silicon. On the one hand, the formed SEI containing O-Si-C structure has better mechanical properties and ionic conductivity, which inhibit the fragmentation of Si/C particles and reduce the irreversible consumption of Li⁺. On the other hand, an increase in Li⁺ concentration can increase the amorphous silicon content in the lithiation process. Specifically, the introduction of TTS promotes the formation of the amorphous silicon (a-Si) phase, and the content of the a-Si phase is closely related to the reversible capacity and cycling stability of the silicon anode. The unique phase-regulation mechanism is the key to the ability of TTS modification to enhance the low-temperature electrochemical performance of Si/C anode. This work provides an effective method for the development of materials suitable for operation at low-temperature.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"47 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337589","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}

{"title":"Unveiling Degradation Mechanisms in PtCu/C–N Bimetallic ORR Catalysts: IL-TEM Study Applied to Current Accelerated Stress Testing Protocols","authors":"A.S Pavlets, E.A Moguchikh, I.V Pankov, Ya.V Astravukh, A.A Alekseenko","doi":"10.1016/j.electacta.2025.146743","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146743","url":null,"abstract":"The widespread adoption of devices based on proton-exchange membrane fuel cells directly depends on advances in the development of oxygen reduction reaction catalysts. A bimetallic PtCu/C–N catalyst using a facile, surfactant-free liquid-phase method was synthesized. The catalyst exhibits excellent uniformity in size and distribution, with an average nanoparticle diameter of 2.9 nm attributed to the intercalation of nitrogen atoms into the carbon support. The mass activity has reached 1.4 A/mg_Pt, which exceeds commercial Pt/C by 5.5 times. Stability tests have been performed under three accelerated stress testing (AST) protocols, revealing distinct degradation mechanisms such as nanoparticle dissolution and Ostwald ripening. The structural stability for the home-made catalyst has been proven by identical location transmission electron microscopy (IL-TEM), including scanning transmission electron microscopy and secondary electron imaging. The IL-TEM analysis has indicated exceptional morphological stability, with an average nanoparticle size variation of only 0.4 nm during stress testing. Following 30,000 cycles under the DOE-recommended protocol, mass activity of the catalyst retains 67% stability. The study conducted emphasizes the need for comprehensive analysis of bimetallic catalysts as degradation mechanisms may vary widely. The combined electrochemical-structural analysis offers insights into the stability mechanisms of bimetallic catalysts on heteroatom-doped supports.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"43 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335429","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}