首页|Ultrafast joule-heating synthesis of FeCoMnCuAl high-entropy-alloy nanoparticles as efficient OER electrocatalysts

Ultrafast joule-heating synthesis of FeCoMnCuAl high-entropy-alloy nanoparticles as efficient OER electrocatalysts

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High entropy alloys(HEAs),known for their synergistic orbital interactions among multiple elements,have been recognized as promising electrocatalysts for enhancing the sluggish kinetics of oxygen evolution reaction(OER).Despite their potential,the facile and rapid preparation of HEA nanoparticles(NPs)with high electrocatalytic activity remains challenging.Here,we report an ultrafast synthesis of noble-metal-free FeCoMnCuAl HEA NPs loaded on conductive carbon fiber networks using a Joule heating strategy.The prepared HEA NPs exhibited a face-centered cubic(FCC)structure with an average size of approximately 25 nm.Synchrotron X-ray absorption fine structure(XAFS)and X-ray photoelectron spectroscopy(XPS)studies were performed to investigate the atomic and electronic structures of the HEA NPs,revealing the co-presence of Fe,Co,Mn,Cu and Al elements as well as their different valences across surface and internal regions.The HEA NPs showed remarkable OER performance,exhibiting an overpotential of 280 mV at 10 mA cm-2 and a low Tafel slope of 76.13 mV dec-1 in a 1.0 M KOH solution with high electrochemical stability,superior to commercial RuO2 electrocatalysts.This work provides a new approach for synthesizing nanoscale noble-metal-free HEA electrocatalysts for clean energy conversion applications on a large-scale basis for practical commercialization.

Xindong Zhu、Wen Huang、Yu Lou、Zhongzheng Yao、Huiqiang Ying、Min Dong、Lan Tan、Jianrong Zeng、Hua Ji、He Zhu、Si Lan

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Herbert Gleiter Institute of Nanoscience,School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,210094,China

Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai,201204,China

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai,201800,China

Scientific Research and Innovation Center,Suzhou Nuclear Power Research Institute,Suzhou,215004,China

National Engineering Research Center for Nuclear Power Plant Safety & Reliability,Suzhou,215004,China

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2024

10.1016/j.pnsc.2024.08.005

自然科学进展·国际材料(英文)
国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25
ISSN：1002-0071
年,卷(期)：2024.34(5)