Carbon-Supported Noble Metal-Free High-Entropy Alloy: A New Synthesis Approach and Application to Hydrogen Evolution Reaction

IF 2.8 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2025-04-23 DOI:10.1007/s12678-025-00953-7

Naveen Kumar Verma, Rahul Gupta, Nishith Verma

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Abstract

High-entropy alloys (HEAs) have attracted significant interest because of the materials structural and thermal stabilities, tailorable compositions, and unique functional properties. The present study synthesizes for the first time a noble metals-free HEA of Cu, Fe, Zn, Ni, and Co (CFZNC) supported on activated carbon powder (ACP) by the suspension polymerization of a phenol–formaldehyde precursor, followed by thermal treatment (carbonization, steam-activation, and H₂-reduction), and ball milling. Metal salts were in situ added to the polymerization reaction mixture. The electrochemical activity tests reveal a good hydrogen evolution rate (169 μmol.L⁻¹.h⁻¹) over the synthesized CFZNC-HEA/ACP, with an overpotential of 139 mV at the current density of 10 mA.cm⁻² in alkaline medium. The tests also show the Faradaic efficiency of 90.5% and the materials stability up to 30 h. This study has provided a new approach to synthesize the non-noble metals-based HEA in bulk quantity as an efficient electroctalyst for environmental and energy applications including hydrogen storage, and carbon dioxide and nitrate reductions.

Graphical Abstract

查看原文本刊更多论文

无碳负载贵金属高熵合金：一种新的合成方法及其在析氢反应中的应用

高熵合金（HEAs）由于其结构和热稳定性、可定制的成分和独特的功能特性而引起了人们的极大兴趣。本研究首次采用苯酚-甲醛前体悬浮聚合，经过热处理（碳化、蒸汽活化、h2还原）和球磨，合成了含Cu、Fe、Zn、Ni、Co的无贵金属HEA （CFZNC）负载在活性炭粉（ACP）上。将金属盐原位添加到聚合反应混合物中。电化学活性测试表明，在碱性介质中，当电流密度为10 mA.cm−2时，合成的cfzrc - hea /ACP具有良好的析氢速率（169 μmol.L−1.h−1），过电位为139 mV。实验还表明，Faradaic效率为90.5%，材料稳定性长达30 h。该研究为大批量合成非贵金属基HEA提供了一种新的方法，作为一种高效的电催化剂，可用于环境和能源应用，包括储氢，二氧化碳和硝酸盐还原。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.