Electrochimica Acta最新文献_第6页

Electronic structure modulation via atomic Ni doping for metallization-driven high-performance CuCo2S4 supercapacitors 金属化驱动高性能CuCo2S4超级电容器的Ni掺杂电子结构调制

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-05 DOI: 10.1016/j.electacta.2026.148384

Wenhui Li, Da Qiu, Junwei Huang, Haoyi Li, Hongna Xing, Xiuhong Zhu, Juan Feng, Yan Zong, Xinghua Li, Xinliang Zheng

{"title":"Electronic structure modulation via atomic Ni doping for metallization-driven high-performance CuCo2S4 supercapacitors","authors":"Wenhui Li, Da Qiu, Junwei Huang, Haoyi Li, Hongna Xing, Xiuhong Zhu, Juan Feng, Yan Zong, Xinghua Li, Xinliang Zheng","doi":"10.1016/j.electacta.2026.148384","DOIUrl":"10.1016/j.electacta.2026.148384","url":null,"abstract":"<div><div>The intrinsically low conductivity of CuCo<sub>2</sub>S<sub>4</sub> severely limits its electrochemical performance as an electrode. Herein, we propose an atomic-level doping strategy via a ternary Cu-Co-Ni MOF precursor to precisely incorporate Ni into the CuCo<sub>2</sub>S<sub>4</sub> lattice. First-principle calculations reveal that Ni doping introduces localized electronic states near the Fermi level, effectively narrowing the bandgap and inducing a semiconductor-to-metallic transition. This electronic structure modulation significantly enhances bulk electron mobility and strengthens the adsorption of electrolyte OH<sup>-</sup> ions. Coupled with the preserved porous carbon framework and multi-metal synergistic interface, the optimized Ni-CuCo<sub>2</sub>S<sub>4</sub>@C electrode achieves a high specific capacitance of 1046 F g<sup>-1</sup> at 1 A g<sup>-1</sup>. The assembled asymmetric supercapacitor delivers an energy density of 32 Wh kg<sup>-1</sup> at 750 W kg<sup>-1</sup>, alongside excellent cycling stability. This work elucidates the electronic origin of performance enhancement and provides a doping-guided design principle for high-conductivity metal sulfide electrodes.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148384"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187416","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}

引用次数: 0

A critical review: Rational design and synthesis of high-performance Fe/N/C catalysts for PEMFCs based on mechanistic understanding 基于机理理解的pemfc高性能Fe/N/C催化剂的合理设计与合成综述

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-10 DOI: 10.1016/j.electacta.2026.148422

Wu Wang , Shu-Hu Yin , Xiao-Yang Cheng , Long Chen , Rui Huang , Yu-Cheng Wang , Tao Wang , Zhi-You Zhou , Yan-Xia Jiang , Shi-Gang Sun

{"title":"A critical review: Rational design and synthesis of high-performance Fe/N/C catalysts for PEMFCs based on mechanistic understanding","authors":"Wu Wang , Shu-Hu Yin , Xiao-Yang Cheng , Long Chen , Rui Huang , Yu-Cheng Wang , Tao Wang , Zhi-You Zhou , Yan-Xia Jiang , Shi-Gang Sun","doi":"10.1016/j.electacta.2026.148422","DOIUrl":"10.1016/j.electacta.2026.148422","url":null,"abstract":"<div><div>Iron-nitrogen-carbon (Fe/N/C) catalysts have emerged as the most promising platinum-group-metal-free electrocatalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Although significant progress has been made in improving their intrinsic activity, practical application is still hindered by insufficient stability and a notable performance gap between idealized rotating disk electrode (RDE) measurements and real membrane electrode assembly (MEA) performance. This review systematically summarizes up-to-date progress in the rational design and synthesis of high-performance Fe/N/C catalysts based on mechanistic understanding. It begins with examining the atomic configuration, electronic structure, and spatial distribution of active sites, establishing relationships between electrocatalytic performance and intrinsic catalytic activity, active site structure and density, as well as device performance. Following discussions then detail catalyst synthesis methods, from conventional high-temperature pyrolysis to emerging low-temperature routes, revealing active site formation mechanisms and highlighting strategies for controllable construction of high-density single-atom sites. For performance enhancement, the review comprehensively summarizes activity-boosting strategies including introducing nanoparticles/clusters, heteroatom doping, and carbon support engineering, alongside stability-improving approaches such as mitigating radical attack, strengthening Fe-N coordination, and enhancing graphitization. Finally, future research directions are outlined to guide the rational design and synthesis of Fe/N/C catalysts that integrate high activity, durability, and superior MEA performance. This review provides valuable insights for developing next-generation Fe/N/C catalysts towards practical PEMFC applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148422"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146609","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}

引用次数: 0

Composite heterostructured Co3O4@CeO2 hollow nanospheres as an effective cathode catalyst for lithium-O2 battery 复合异质结构Co3O4@CeO2空心纳米球作为锂- o2电池的有效阴极催化剂

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148386

Pengfa Li , Jie Yang , Xiaoguang Li , Cunjing Wang , Zhihua Ma , Quanzhou Du , Jiao Guo , Xiaowei Guo , Liujie Wang

{"title":"Composite heterostructured Co3O4@CeO2 hollow nanospheres as an effective cathode catalyst for lithium-O2 battery","authors":"Pengfa Li , Jie Yang , Xiaoguang Li , Cunjing Wang , Zhihua Ma , Quanzhou Du , Jiao Guo , Xiaowei Guo , Liujie Wang","doi":"10.1016/j.electacta.2026.148386","DOIUrl":"10.1016/j.electacta.2026.148386","url":null,"abstract":"<div><div>Lithium-O<sub>2</sub> batteries (LOBs) are considered potential energy storage systems, given their very high theoretical energy density. Nevertheless, the sluggish kinetics of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) may lead to elevated overpotentials and diminished cycle stability. In this research, composite heterostructured Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> hollow nanospheres (Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> HNs) were prepared using a convenient hydrothermal approach, and then subjected to an annealing step, which exhibited good performance as a bi-functional catalyst for LOBs. The heterostructured hollow nanospheres provided an extensive catalytic surface to facilitate reaction kinetics. In addition, benefitting from the interfacial electron rearrangement of Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> heterostructure, the synergistic interaction can be contributed to ameliorate the chemisorption of intermediates and decrease the discharge and charge overpotentials, as validated-by density functional theory (DFT) calculations and experimental tests. Consequently, the assembled LOBs exhibited a narrow voltage gap (1.02 V at a middle capacity of 500 mAh g<sup>-1</sup>), an enhanced discharge capacity of 8988.8 mAh g<sup>-1</sup>, and cycling stability over 50 cycles at a controlled capacity of 500 mAh g<sup>-1</sup>. Notably, the Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> HNs exhibited superior electrocatalytic activity than the individual Co<sub>3</sub>O<sub>4</sub> nanospheres (Co<sub>3</sub>O<sub>4</sub> Ns) and CeO<sub>2</sub> nanospheres (CeO<sub>2</sub> Ns). Overall, this work presents an innovative methodology for designing heterojunctions to improve the electrocatalytic performance of LOBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148386"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138784","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}

引用次数: 0

A conductive metal-organic framework-modified electrode for sensitive electrochemiluminescent detection of cardiac Troponin I 导电金属-有机框架修饰电极电化学发光检测心肌肌钙蛋白I

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-01 DOI: 10.1016/j.electacta.2026.148350

Alenzo Murray , Giovanni Valenti , Priscilla Baker

{"title":"A conductive metal-organic framework-modified electrode for sensitive electrochemiluminescent detection of cardiac Troponin I","authors":"Alenzo Murray , Giovanni Valenti , Priscilla Baker","doi":"10.1016/j.electacta.2026.148350","DOIUrl":"10.1016/j.electacta.2026.148350","url":null,"abstract":"<div><div>The design of a sensitive and accurate electrochemiluminescence (ECL) immunosensor for the early detection of cardiac biomarkers at low concentrations is essential to improve patient outcomes. In this study, a conductive metal-organic framework (c-MOF), Cu<sub>3</sub>(HHTP)<sub>2</sub>, was drop-coated onto a screen-printed carbon electrode (SPCE) to produce an ultra-efficient electrochemical sensing platform which was subsequently functionalized with cTnI antibodies (Ab) and bovine serum albumin (BSA) for selective detection of the cardiac Troponin I. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) confirmed the successful stepwise fabrication of the immunosensor. We investigated the ECL behaviour of the Cu<sub>3</sub>(HHTP)<sub>2</sub>-modified SPCE using [Ru(bpy)<sub>3</sub>]<sup>2+</sup> as the luminophore and found that a significant increase in ECL intensity was achieved compared to that of the unmodified SPCE. This enhancement was attributed to the high conductivity, porous structure, the increased surface area of the c-MOF and crucially the HHTP ligand plays a critical role in enabling ECL generation in this system. The analytical performance of the immunosensor was evaluated by monitoring the ECL responses at varying cTnI concentrations. The immunosensor achieved a detection limit of 10.23 ± 1.06 pg/mL in vitro, well below the clinically relevant cTnI thresholds, highlighting its potential for rapid and early-stage cardiac biomarker detection. These findings suggest the Cu<sub>3</sub>(HHTP)<sub>2</sub>-based ECL immunosensor represents a viable sensing platform that significantly increases conductivity and ECL efficiency without the need of additional co-reactant species.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148350"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098423","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}

引用次数: 0

Fe3O4 nano-octahedra/Vulcan XC72: Optimization and combination with solar-based electro-fenton for progestins degradation Fe3O4纳米八面体/Vulcan XC72：优化和结合太阳能电fenton降解孕激素

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148426

Juliana M.S. de Jesus, Caroline de O. Carrilho, João P.C. Moura, Aline B. Trench, Caroline C. Augusto, Bruno L. Batista, Mauro C. dos Santos

{"title":"Fe3O4 nano-octahedra/Vulcan XC72: Optimization and combination with solar-based electro-fenton for progestins degradation","authors":"Juliana M.S. de Jesus, Caroline de O. Carrilho, João P.C. Moura, Aline B. Trench, Caroline C. Augusto, Bruno L. Batista, Mauro C. dos Santos","doi":"10.1016/j.electacta.2026.148426","DOIUrl":"10.1016/j.electacta.2026.148426","url":null,"abstract":"<div><div>The widespread presence of synthetic progestins, such as levonorgestrel (LNG) and gestodene (GES), in aquatic environments poses significant ecotoxicological risks due to their endocrine-disrupting properties. In this study, nano-octahedral magnetite (Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO) was synthesized via a hydrothermal route and incorporated into gas diffusion electrodes (GDEs) supported on Vulcan XC72 to enhance the <em>in-situ</em> electrogeneration of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). High-resolution Transmission Electron Microscopy, X-ray diffraction, SEM, X-ray photoelectron spectroscopy, and contact angle measurements thoroughly characterized the physicochemical and morphological properties of the materials. 3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C provided a 2-fold increase on H<sub>2</sub>O<sub>2</sub> selectivity in comparison with Vulcan XC72. Electrochemical performance was optimized using a 2<sup>3</sup> factorial design and principal component analysis (PCA), with current density, pH, and Na<sub>2</sub>SO<sub>4</sub> concentration as variables. The optimized GDE (3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C) achieved a maximum H<sub>2</sub>O<sub>2</sub> production of 0.44 ± 0.02 g L⁻¹ with a current efficiency of 43.1 ± 0.23 % and a specific energy consumption of 0.012 ± 0.009 kWh g⁻¹. The electrode was further applied to the degradation of LNG and GES using solar and anodic-assisted electro-Fenton processes. Under optimal conditions, over 70 % removal of both progestins was achieved, with stable performance across three operational cycles. These findings demonstrate the potential of 3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C-GDEs as efficient, reusable cathodes for sustainable electrochemical advanced oxidation processes (EAOPs) in water treatment.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148426"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146611","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}

引用次数: 0

Homogenization-induced improvements in mechanical and corrosion properties of Mg-12.31Li-5.62Al-0.14Y alloy 均匀化诱导Mg-12.31Li-5.62Al-0.14Y合金力学和腐蚀性能的改善

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148410

Jiahao Sun , Xu Wang , Yang Li , Jinping Yuan , Yun Zou

{"title":"Homogenization-induced improvements in mechanical and corrosion properties of Mg-12.31Li-5.62Al-0.14Y alloy","authors":"Jiahao Sun , Xu Wang , Yang Li , Jinping Yuan , Yun Zou","doi":"10.1016/j.electacta.2026.148410","DOIUrl":"10.1016/j.electacta.2026.148410","url":null,"abstract":"<div><div>The effects of homogenization treatment on the mechanical properties and corrosion behavior of an LA126 (Mg-12.31Li-5.62Al-0.14Y, wt.%) alloy were systematically investigated. The as-cast alloy was homogenized at 250 and 400°C for 1, 4, and 7 h, and its mechanical properties and corrosion behavior in 3.5 wt.% NaCl solution were evaluated. Homogenization at 400°C increased strength but reduced ductility, a trade-off primarily attributed to the precipitation of MgLiAl₂ within the β-Li matrix. While this intermetallic phase contributes to strengthening, its coarser morphology tends to induce local stress concentration, thereby compromising plasticity. In contrast, treatment at 250°C enhanced ductility with only a slight reduction in strength, mainly by alleviating casting-induced elemental segregation. Notably, the specimen homogenized at 400°C for 7 h exhibited superior corrosion resistance, characterized by a more noble corrosion potential (-1.571 V), a lower corrosion current density (5.11 × 10⁻⁵ A·cm⁻²), and the lowest mass-loss rate (0.67 mg·cm⁻²·d⁻¹). This enhancement is ascribed to the dissolution of anodic AlLi phases and improved microstructural uniformity, which effectively suppresses micro-galvanic coupling and localized corrosion.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148410"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146565","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}

引用次数: 0

A physics-informed dual-electrode equivalent circuit model for lithium iron phosphate battery cells 磷酸铁锂电池的双电极等效电路模型

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-19 DOI: 10.1016/j.electacta.2026.148884

Jonas A. Braun, David Schmider, Wolfgang G. Bessler

{"title":"A physics-informed dual-electrode equivalent circuit model for lithium iron phosphate battery cells","authors":"Jonas A. Braun, David Schmider, Wolfgang G. Bessler","doi":"10.1016/j.electacta.2026.148884","DOIUrl":"https://doi.org/10.1016/j.electacta.2026.148884","url":null,"abstract":"Lithium-ion batteries with lithium iron phosphate (LiFePO₄, LFP) positive electrodes and graphite negative electrodes exhibit complex voltage behavior, including flat, staged voltage curves at low C-rates, open-circuit voltage hysteresis, and asymmetric overpotentials, which challenges established modeling approaches. To address these complexities, six commercial LFP/graphite cells (nominal capacities between 3.4 Ah and 180 Ah) were experimentally characterized using constant current constant voltage cycling and pulse tests. Consistent self-similar voltage behaviors were observed across all cells. To capture these behaviors, a series of five physics-informed dual-electrode equivalent circuit models was developed, progressively increasing in complexity. These models integrate electrode-specific voltage sources, hysteresis, and stoichiometry-dependent resistances based on Butler-Volmer kinetics. For the first time, multi-particle phase-change behavior of LFP is integrated into a resistor element. Slow dynamic effects were modeled via either core-shell Fickian diffusion or additional resistor-capacitor (RC) elements. Models were parameterized and validated against experimental results over a range of C-rates (0.02-1 C) and temperatures (5-35°C). Results demonstrate that including physicochemical insights is critical to reproducing low-current behavior and asymmetric overpotentials. The most advanced model, featuring hysteresis and three RC elements, successfully captures behavior across all conditions. The physics-informed modeling introduced here allows higher fidelity at a reduced number of parameters compared to state-of-the-art equivalent circuit models.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"23 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2026-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147709158","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}

引用次数: 0

Electrochemical behavior of Sc (III) and preparation of Al-Sc alloys in NaF-AlF3-BaF2 by a floating molten aluminum cathode Sc （III）的电化学行为及其在NaF-AlF3-BaF2中制备Al-Sc合金

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-01-20 DOI: 10.1016/j.electacta.2026.148282

Daxue Fu , Jiuhua Wu , Chengyu Wang , Chunxin Wang , Qunzhao Xu , Jianshe Chen , Qing Han , Shuchen Sun

{"title":"Electrochemical behavior of Sc (III) and preparation of Al-Sc alloys in NaF-AlF3-BaF2 by a floating molten aluminum cathode","authors":"Daxue Fu , Jiuhua Wu , Chengyu Wang , Chunxin Wang , Qunzhao Xu , Jianshe Chen , Qing Han , Shuchen Sun","doi":"10.1016/j.electacta.2026.148282","DOIUrl":"10.1016/j.electacta.2026.148282","url":null,"abstract":"<div><div>Scandium is one of the key alloying elements for aluminum. This study presents an innovative upward-flow liquid aluminum cathode molten salt electrolysis method for producing composition stability Al-Sc alloys. A system NaF-AlF<sub>3</sub>-BaF<sub>2</sub> (molar ratio of NaF to AlF<sub>3</sub> = 2.2) containing 25 wt% BaF<sub>2</sub> was used as the electrolyte to achieve the floating molten aluminum cathode. The electrodeposition behavior of Sc at a tungsten cathode was analyzed in the electrolyte and experiments were carried out to produce Al-Sc alloys by the proposed process. The results show that the reduction of Sc (III) at 1273 K involved a one-step reaction with three-electron transfer. The process was limited by the diffusion of Sc (III) ions from the electrolyte to the electrode interface with a diffusion coefficient of 1.943 × 10<sup>–5</sup> cm<sup>2</sup>/s. SEM-EDS and XRD analyses revealed that the early electrolysis products contained Al<sub>3</sub>Sc phase and W-Sc enrichment zones, while the final cooled products exhibited Sc in the surrounding Al layer, which primarily precipitates via aluminothermic reduction. Spherical products with the maximum scandium content of 3.68 wt% were obtained under a current density of 1.0 A/cm<sup>2</sup> at 1273 K.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148282"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014665","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}

引用次数: 0

Designing Pt-decorated MoO2 catalysts for enhanced hydrogen evolution reaction in proton exchange membrane water electrolysis 设计用于质子交换膜电解中强化析氢反应的pt修饰MoO2催化剂

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148405

Jin Li , Jiaqi Zhu , Qianqian Tang , Heng Zhang

{"title":"Designing Pt-decorated MoO2 catalysts for enhanced hydrogen evolution reaction in proton exchange membrane water electrolysis","authors":"Jin Li , Jiaqi Zhu , Qianqian Tang , Heng Zhang","doi":"10.1016/j.electacta.2026.148405","DOIUrl":"10.1016/j.electacta.2026.148405","url":null,"abstract":"<div><div>To improve platinum (Pt) utilization and electrocatalytic performance, selecting a suitable support material is essential. In this study, Pt was successfully incorporated into a self-supported molybdenum dioxide (MoO<sub>2</sub>) framework via an electrodeposition technique, with the Pt content measuring around 0.56 wt %. The resulting catalyst exhibits an overpotential of 11.2 mV at a current density of −10 mA cm<sup>−2</sup> and remarkable durability that extends beyond 50 h. Moreover, the practical proton exchange membrane water electrolysis (PEMWE) system with this catalyst achieves a current density of 1 A cm<sup>−2</sup> at 1.75 V and operates stably for 100 h. Experimental findings verify that the improved performance of the catalyst is attributed to the strong interaction between Pt and MoO<sub>2</sub>, its distinctive nanosheet morphology, as well as the self-supporting characteristic of the electrode. This strategy provides an effective means for developing freestanding heterojunctions and promotes progress in the field of electrocatalytic hydrogen generation.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148405"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138786","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}

引用次数: 0

Recursive RC Modeling for Time-Domain Estimation of the Distribution of Relaxation Times 时域估计松弛时间分布的递归RC模型

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-10 DOI: 10.1016/j.electacta.2026.148402

Marvin Malchau, Jan Philipp Schmidt

引用次数: 0