Electrocatalysis最新文献

{"title":"Designing of CQDs-decorated NiMn₂S₄ Nanosheets as Oxygen Evolution Reaction Electrocatalysts for Water Electrolysis","authors":"Mahdiyyeh Sadeghi Amjadi,&nbsp;Habib Ashassi-Sorkhabi,&nbsp;Mir ghasem Hosseini,&nbsp;Bruno G. Pollet,&nbsp;Elnaz Asghari","doi":"10.1007/s12678-026-01055-8","DOIUrl":"10.1007/s12678-026-01055-8","url":null,"abstract":"<div><p>This study explores a morphology-controlled synthesis strategy for an innovative hybrid nanostructure composed of carbon quantum dots (CQDs) integrated with NiMn₂S₄ nanosheets, designed to enhance the oxygen evolution reaction (OER) performance. Uniform, ultrathin, and regular discrete nanosheet arrays were grown on nickel foam via hydrothermal synthesis followed by calcination at 400 °C. The low thickness of the nanosheets increases the number of active sites for the OER. Moreover, the interconnected nanosheet framework facilitates the transport of electrolyte ions and enables efficient bubble release during OER. In addition, the intimate integration of ultrathin nanosheets with the substrate promotes efficient electron transfer and improves long-term stability. Notably, the CQDs/NiMn₂S₄ hybrid exhibits a low overpotential of 350 mV at a current density of 10 mA cm^− 2, along with excellent stability over 55 h of operation. The structure and morphology of the CQDs/NiMn₂S₄ composite were characterized by field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and Raman spectroscopy. This work provides an innovative strategy for enhancing the OER performance of NiMn₂S₄ through surface decoration with carbon quantum dots for water-splitting applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"926 - 941"},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sn(MoO₄)₂-Modified Carbon Cloth Electrode for Simultaneous Electrochemical Detection of Pb2+, Cu2+ and Hg2+","authors":"Pragya,&nbsp;Shivangini Singh,&nbsp;Naveen Kumar Veldurthi,&nbsp;Sudhanshu Pati","doi":"10.1007/s12678-026-01054-9","DOIUrl":"10.1007/s12678-026-01054-9","url":null,"abstract":"<div><p>Due to the adverse effects of heavy metal ions on living organisms, a novel Sn(MoO₄)₂-modified carbon cloth (Sn(MoO₄)₂/CC) electrode is designed for the sensitive and selective electrochemical detection of Pb²⁺, Cu²⁺ and Hg²⁺ ions. The Sn(MoO₄)₂ nanostructures were synthesized hydrothermally, exhibiting a needle-like morphology with high crystallinity and uniform elemental distribution, as confirmed by structural and morphological studies. The average length and breadth of the nanostructures were calculated to be ~ 1000 and ~ 167 nm, respectively. The Sn(MoO₄)₂/CC electrode demonstrated excellent electrochemical performance toward the simultaneous and individual detection of Pb²⁺, Cu²⁺, and Hg²⁺ as depicted from the square wave anodic stripping voltammetry. The limit of detection (LOD) for the simultaneous detection of Pb²⁺, Cu²⁺, and Hg²⁺ is 40.78 nM, 15.44 nM and 13.34 nM, and when studied individually, is 8.62 nM, 15.8 nM, and 60 nM, respectively. Well-resolved, distinct stripping peaks were observed for all three metal ions, with no significant overlap, ensuring simultaneous detection. The linear dependence of the response current over a wide concentration range (0-2.2 µM) ensures high sensitivity and strong selectivity even in the presence of common interfering ions, further enabling its reliability. Overall, this study shows that Sn(MoO₄)₂/CC is a cost-effective, reliable sensor material for detecting toxic heavy metals in the environment. Its straightforward fabrication process, adaptability, and excellent analytical capabilities make this electrode ideal for on-site water quality testing and real-time environmental monitoring.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"914 - 925"},"PeriodicalIF":3.2,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Indicators, Core Materials, Operating Parameters, and Prospects of Alkaline Electrolyzers: A Comprehensive Review","authors":"Wang Hui,&nbsp;Han Kunyan,&nbsp;Feng Qing,&nbsp;Du Ke,&nbsp;Wang Zheng,&nbsp;Wang Jiahao,&nbsp;Liu Jingtian,&nbsp;Kang Xuanqi,&nbsp;Jia Bo","doi":"10.1007/s12678-026-01049-6","DOIUrl":"10.1007/s12678-026-01049-6","url":null,"abstract":"<div><p>Benefiting from high technical maturity and cost competitiveness, alkaline water electrolysis (ALK) has become the mainstream technology for large-scale global green hydrogen production. This paper systematically reviews water electrolysis technologies for hydrogen production in China. It compares the technical routes, market distributions, and competitive landscape of four mainstream electrolysis techniques, elaborates on the classification and structure of ALK electrolyzers, and focuses on key performance indicators, including cell voltage, Faradaic efficiency, specific energy consumption, energy efficiency, and hydrogen production rate. The effects of core material components (electrodes, diaphragms, and bipolar plates) and critical operating parameters (current density, operating temperature, electrolyte flow rate, system pressure, electrode-diaphragm gap, and cell voltage) on the performance of ALK electrolyzers are comprehensively analyzed. Two key bottlenecks restricting ALK industrial development are summarized: widespread product homogenization leads to fierce price competition, and traditional steady-state designs fail to adapt to fluctuating renewable energy. Finally, prospective development directions are proposed from the aspects of material optimization, structural innovation, system control, and economic viability.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Green Hydrogen Generation System Based on Alkaline Water Electrolysis</p></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"813 - 830"},"PeriodicalIF":3.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulating Interfacial Electron Redistribution via Oxygen-Coordinatively Unsaturated Tungsten Sites for High-Performance Acidic Water Oxidation","authors":"Qiang Liu,&nbsp;Fen Yi,&nbsp;Guochun Li,&nbsp;Xuhan Cao,&nbsp;Lili Huang,&nbsp;Liang Li","doi":"10.1007/s12678-026-01042-z","DOIUrl":"10.1007/s12678-026-01042-z","url":null,"abstract":"<div><p>Proton exchange membrane water electrolysis (PEMWE) is a key technology for green hydrogen production, but its widespread deployment is severely constrained by the sluggish kinetics of the anodic oxygen evolution reaction (OER) and the high iridium loading required to achieve practical performance. Herein, we report an interfacial electronic modulation strategy that simultaneously enhance the activity and durability of IrO₂ catalysts by engineering oxygen-deficient tungsten oxide (WO_3−x) supports. The deliberate generation of abundant oxygen-coordinatively unsaturated tungsten (W_OCU) sites enables strong electronic coupling at the IrO₂/WO_3−x interface, leading to the formation of well-defined Ir-O-W_OCU motifs. Comprehensive structural and spectroscopic analyses reveal that these motifs drive pronounced electron redistribution from the WO_3−x support to Ir centers, resulting in a downshift of the Ir d-band center and stabilization of catalytically active Ir³⁺ species. Consequently, the IrO₂@WO_3−x catalyst exhibits a low overpotential of 324 mV at 10 mA cm^− 2 and a high mass activity of 163.3 A g⁻¹_Ir. More importantly, Ir dissolution is significantly suppressed, endowing the catalyst with enhanced structural stability during prolonged operation. In a practical PEMWE single-cell, the IrO₂@WO_3−x anode achieves a low cell voltage of 1.667 V at 1 A cm^− 2 and stable operation for over 200 h with a low iridium loading of 0.2 mg cm^− 2. This work highlights the critical role of oxygen‑coordinatively unsaturated sites in governing interfacial electronic structure and catalytic behavior, and provides a rational design strategy for cost‑effective and durable electrocatalysts for acidic water oxidation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"905 - 913"},"PeriodicalIF":3.2,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and Characterization of Z-Scheme Bi2O3/MoO3 Nanocomposite for Electrocatalytic Activity for Degradation of Mixed Organic Dyes","authors":"Ahmed M. Mokhtar,&nbsp;Mohamed Abdel-Megid,&nbsp;Ahmed T. Mosleh,&nbsp;Mostafa E. Salem,&nbsp;Heba Y. Zahran,&nbsp;Elbadawy A. Kamoun,&nbsp;V. Ganesh,&nbsp;Ibrahim S. Yahia","doi":"10.1007/s12678-026-01048-7","DOIUrl":"10.1007/s12678-026-01048-7","url":null,"abstract":"<div><p>In this study, one-pot sol-gel/auto-combustion method was applied to fabricate Bi₂O₃/MoO₃ nanocomposites as a direct <i>Z-Scheme</i> electrocatalyst. The manufactured composite’s structural, surface, and morphological characteristics were comprehensively investigated by XRD, FTIR, SEM/EDX, HR-TEM analyses, and UV–Visible spectroscopy. Results demonstrated that <i>Z-scheme</i> BMO-5 NCs’ low band gap energy is found at 3.027 eV, with a high electrocatalytic activity. The electrocatalytic performance of BMO electrocatalyst was investigated <i>via</i> degradation of <i>Methyl blue</i> (MB), <i>Brilliant green</i> (BG), and mixed dyes under current voltage irradiation. Meanwhile, degradation efficiency of MB and BG dyes with BMO-5 NCs demonstrated around 96.16% within 15 min and 96.73% within 5 min, respectively. The EC kinetic rate data were analyzed using a <i>pseudo-first-order</i> kinetic model and the <i>Langmuir-Hinshelwood</i> (L-H) model. BMO-5 NCs have measured rate constants of 0.33803 and 0.62365 min^− 1 for MB and BG dye. The hydroxyl radical<span>(:()</span>^•<span>(:OH))</span> and superoxide radical <span>(:(O)</span>₂^•−<span>(:))</span> significantly affect electrocatalytic degradation of BG dye. Bi₂O₃/MoO₃ is a potential material for environmental remediation and wastewater treatment, due to its dual functionality.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Preparation route of Z-Scheme Bi₂O₃/MoO₃ NCs</p></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"882 - 904"},"PeriodicalIF":3.2,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CeCO3F-NiFe-LDH/NF System: A Comprehensive Study of Structural Morphological, and Electronic Effects on Oxygen Evolution Reaction","authors":"Tayyaba Ayesha,&nbsp;Hongyu Zhou,&nbsp;Chunli Xu","doi":"10.1007/s12678-026-01051-y","DOIUrl":"10.1007/s12678-026-01051-y","url":null,"abstract":"<div><p>Developing efficient, durable, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for sustainable energy systems. NiFe-LDH is a promising OER catalyst but suffers from limited conductivity, agglomeration, and moderate intrinsic activity. Herein, we stabilize Ce within NiFe-LDH via a unique CeCO₃F phase resulting (CeCO₃F-NiFe-LDH/NF) as improved OER catalyst. This induces (i) nanoscale exfoliation into thinner nanosheets, (ii) oxygen deficient surface specie, and (iii) high-valence Ni/Fe species. Consequently, catalyst achieving an overpotential of 193 mV and 234 mV to deliver a current density of 10 mA cm^-2 and 100 mA cm^-2 respectively with a small Tafel slope of 70 mV dec^-1. Comprehensive characterization reveals that the synergistic co-doping of Ce and F induces multifaceted enhancements: Ce promotes high-valence Ni/Fe species and according to XPS analysis, the formation of oxygen-deficient surface specie, which aid the charge compensation, while F⁻ incorporation creates atomic-level point defects and induces lattice strain. Furthermore, the in-situ formed CeCO₃F phase acts as a structural modifier, leading to nanoscale exfoliation into thinner nanosheets and the creation of a conductive framework. These synergistic effects collectively enhance charge transfer kinetics, increase the number of active sites, increase the electrochemically active surface area, and boost the intrinsic activity of active sites. The catalyst also demonstrates excellent stability over 27 h of operation. This work highlights rational heteroatom co-doping as a promising strategy for designing high-performance, non-precious metal-based electrocatalysts.</p></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"856 - 869"},"PeriodicalIF":3.2,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Durability of Ru–Lanthanide Oxide Cathode Catalysts Supported on Different Substrates during Repeated Startup and Shutdown Operations in Alkaline Water Electrolysis","authors":"Eiji Higuchi,&nbsp;Teruaki Miyake,&nbsp;Tomohiro Higashida,&nbsp;Masanobu Chiku,&nbsp;Akihiro Kato,&nbsp;Zaenal Awaludin,&nbsp;Yoshinori Nishiki,&nbsp;Hiroshi Inoue","doi":"10.1007/s12678-026-01053-w","DOIUrl":"10.1007/s12678-026-01053-w","url":null,"abstract":"<div><p>In bipolar alkaline water electrolysis, electrocatalyst degradation due to a reverse current during shutdown is a serious problem. In this study, the effect of the substrate material on the degradation of commercial Ru–lanthanide oxide cathode catalysts due to a reverse current during repeated startup/shutdown (SU/SD) operations was investigated. The causes of catalyst degradation were discussed based on spectroscopic and mass data of the electrolyte and cathode before and after SU/SD operation. In the case of the Ni substrate, the current density for the hydrogen evolution reaction (HER) decreased rapidly during the initial 200 cycles of SU/SD operations. In contrast, for the Ti substrate, the HER current density decreased by ~ 20% in the initial 200 cycles and then stabilized. The dropout ratios of the Ru component on the Ni and Ti substrates were approximately 99% and 27%, respectively. These results demonstrated that catalyst degradation during repeated SU/SD operations was caused by catalyst dropout from both substrates, and the Ti substrate was effective in suppressing the degradation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"870 - 881"},"PeriodicalIF":3.2,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Advances in Substrate-Mediated Self-Supported Electrocatalysts for Efficient Hydrogen Evolution Reaction","authors":"Jingjing Yan,&nbsp;Chengwei Zhu","doi":"10.1007/s12678-026-01052-x","DOIUrl":"10.1007/s12678-026-01052-x","url":null,"abstract":"<div><p>Electrochemical water splitting serves as a promising approach to realize large-scale renewable energy conversion and storage for green hydrogen production. HER electrocatalysts with earth-abundant composition, low cost, high activity and superior stability determine the performance of large-scale water electrolysis. Self-supported catalysts are one of the most promising electrodes for practical hydrogen production, due to their merits of rapid charge/mass transfer, high active site density, well-regulated catalyst–substrate interface, strong adhesion and excellent HER performance. This review systematically summarizes recent advances in diverse substrates (metal foils/foams, carbonaceous materials, 3D-printed supports) for self-supported electrodes, including morphology/structure engineering, doping, interfacial regulation and crystallographic modulation, and presents conclusions and insights on scalable synthesis of high-performance self-supported electrocatalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"795 - 812"},"PeriodicalIF":3.2,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electropolymerized Poly(Bromocresol Purple) as a Signal-Amplifying Interface for the Highly Sensitive Voltammetric Quantification of Antifungal Drug Terbinafine","authors":"Aistė Palukaitytė,&nbsp;Gökçe Öztürk,&nbsp;Elif Şişman,&nbsp;Fatma Ağın,&nbsp;Dilek Kul","doi":"10.1007/s12678-026-01050-z","DOIUrl":"10.1007/s12678-026-01050-z","url":null,"abstract":"<div><p>The electrochemical analysis of terbinafine, an antifungal drug available for oral and topical use, was investigated using poly(bromocresol purple) modified glassy carbon electrode. The surface of the bare electrodes was coated by one-step electropolymerization of bromocresol purple monomer via cyclic voltammetry in a pH 6.0 phosphate buffer solution, resulting in at least a two-fold increase in terbinafine peak current compared to the bare glassy carbon electrode. Electrochemical analysis revealed that terbinafine undergoes irreversible and diffusion-controlled oxidation. Quantitative analysis of terbinafine using differential pulse voltammetry yielded a detection limit of 19.0 nM and a linearity range of 0.08‒20.0 µM. Results with relative standard deviations below 2.0% demonstrated that the method possesses good precision and ruggedness and that the prepared electrode exhibited good reproducibility. Accuracy studies using both the tablet dosage form and synthetic urine showed recoveries of 99.66% and 100.14%, respectively, revealing that the proposed method provided good selectivity, sensitivity, and accuracy without interference from inactive excipients.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"845 - 855"},"PeriodicalIF":3.2,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Electrochemical Evaluation of rGO-Mn₀.₅Co₀.₅Fe₂O₄ Nanocomposite: A Dual-Functional Electrode with Better Capacitance and Oxygen Evaluation Activity","authors":"Arslan Bashir,&nbsp;Nasima Arshad,&nbsp;Furqan Ijaz,&nbsp;Ameer Ali,&nbsp;Muhammad Shahroz,&nbsp;Neha Ali,&nbsp;Ejaz Muhammad,&nbsp;Tariq Jan","doi":"10.1007/s12678-026-01047-8","DOIUrl":"10.1007/s12678-026-01047-8","url":null,"abstract":"<div><p>Nano-ferrites have recently emerged as potential candidates for application in energy storage devices due to their good redox activity, excellent chemical stability and tunable electronic properties. In this study, we report the synthesis of pristine Mn_0.5Co_0.5Fe₂O₄ (MCF) nanoparticles and their nanocomposite with reduced graphene oxide (rGO) via facile chemical co-precipitation method. In this configuration, MCF provides pseudocapacitance and structural stability while rGO contributes a large surface area and high electrical conductivity. Structural morphological analysis confirmed the formation of spinel phase of ferrites having nanoscale features. Electrochemical performance was assessed via cyclic voltammetry (CV) in three-electrode system with 1 M KOH as the electrolyte. Specific capacitance at each scan was higher for composite material. The rGO-MCF nanocomposite exhibited remarkably enhanced specific capacitance of 1228.7 F/g at 2 mV/s, compared to 448 F/g for the pristine MCF. Electrochemical impedance spectroscopy (EIS) revealed lower Charge transfer resistance for nanocomposite (36.8 Ω) than pristine MCF (59.0 Ω) which may be attributed to the high conductive nature of rGO. Moreover, the rGO-MCF composite sample exhibited superior oxygen evolution reaction (OER) activity with a lower overpotential and a Tafel slope of 78 mV/dec along with excellent cyclic stability. These findings suggest that rGO-MCF nanocomposite is a promising candidate for electrodes of supercapacitors and OER applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"831 - 844"},"PeriodicalIF":3.2,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}