Mesoporous high-entropy-alloy electrocatalysts via electrospinning for enhanced alkaline water electrolysis

IF 7.5 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-02-21 DOI:10.1016/j.fuel.2025.134800

Lu Wang , Chuhao Wang , Yuhe Mu , Jingrui Fan , Xiubei Yang , Chengbing Yu , Bing Guo , Gaofeng Zeng

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Abstract

This study reports on the fabrication and characterization of nanofibrous high-entropy alloy (HEA)-based electrocatalysts supported by highly mesoporous carbon materials for efficient alkaline water electrolysis. Employing a synergistic approach of electrospinning, activation, and carbonization, we have developed a material with a high specific surface area and unique structural features that significantly enhance catalytic activity. The FeCoNiMnRu-HCB_0.5 electrode material showcased superior electrocatalytic performance for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with low overpotentials of 42 mV for HER and 229 mV for OER at a current density of 10 mA cm⁻². These values are notably lower than those of commercial noble metal catalysts. The electrode material demonstrated excellent stability over prolonged periods of electrolysis, indicating its potential for practical applications in energy storage and conversion technologies. Our results suggest that this HEA-based electrocatalyst is a promising candidate for next-generation electrocatalytic materials, offering high efficiency and durability for water splitting in alkaline media.

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介孔高熵合金电催化剂的静电纺丝强化碱性电解

本文报道了高介孔碳负载纳米纤维高熵合金（HEA）基电催化剂的制备和表征。采用静电纺丝、活化和碳化的协同方法，我们开发了一种具有高比表面积和独特结构特征的材料，显著提高了催化活性。FeCoNiMnRu-HCB0.5电极材料在析氢反应（HER）和析氧反应（OER）中均表现出优异的电催化性能，在电流密度为10 mA cm−2时，析氢反应（HER）和析氧反应（OER）的过电位分别为42 mV和229 mV。这些值明显低于商用贵金属催化剂的值。该电极材料在长时间的电解过程中表现出优异的稳定性，表明其在能量存储和转换技术中的实际应用潜力。我们的研究结果表明，这种基于hea的电催化剂是下一代电催化材料的候选者，在碱性介质中具有高效和耐用的水分解能力。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.