具有独特结构特征的ni基高熵合金在- 10℃碱性和海水电解中的电催化性能

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-12 DOI:10.1016/j.ijhydene.2025.04.071

Yuwen Pan , Fachang Zhao , Guoning Ji , Songlin Xu , Ruiyu Li , Huiya Zhou , Rongda Zhao , Depeng Zhao , Fufa Wu

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引用次数: 0

摘要

高熵合金（HEAs）作为电解水的新型电催化剂，提供了传统贵金属的替代品。本研究研究了镍基HEA， Nix(FeCoCrCu)100-x，用于HER和OER。在1.0 M KOH条件下，Ni50（FeCoCrCu）在−10 mA cm−2和10 mA cm−2下的过电位分别为189.7 mV和292.3 mV，表现出良好的HER和OER性能。HER的Tafel斜率为141.81 mV dec−1，OER的Tafel斜率为68.37 mV dec−1。在1.0 M海水KOH中，性能略有下降，−10 mA cm−2和10 mA cm−2的HER和OER过电位分别为207.5 mV和310.5 mV， Tafel斜率分别为114.98 mV和86.75 mV dec−1。催化剂在碱性条件下放置100 h，在碱性海水中放置50 h，均表现出良好的稳定性。本研究为HEAs在电催化中的应用提供了实证支持，并为未来电催化材料的开发提供了新的视角。

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Electrocatalytic performance of Ni-based high-entropy alloys with unique structural features in alkaline and seawater electrolysis under −10 °C

High-entropy alloys (HEAs) are emerging as innovative electrocatalysts for water electrolysis, offering alternatives to traditional precious metals. This study investigates Ni-based HEA, Ni_x(FeCoCrCu)_100-x, for HER and OER. In 1.0 M KOH, Ni₅₀(FeCoCrCu) exhibits promising HER and OER performance with overpotentials of 189.7 mV and 292.3 mV, respectively, at −10 mA cm⁻² and 10 mA cm⁻². Tafel slopes are 141.81 mV dec⁻¹ for HER and 68.37 mV dec⁻¹ for OER. In 1.0 M seawater KOH, performance slightly diminishes, with HER and OER overpotentials at −10 mA cm⁻² and 10 mA cm⁻² being 207.5 mV and 310.5 mV, and Tafel slopes of 114.98 mV dec⁻¹ and 86.75 mV dec⁻¹, respectively. The catalyst demonstrates good stability after 100 h in alkaline conditions and 50 h in alkaline seawater. This research provides empirical evidence supporting the use of HEAs in electrocatalysis and offers new perspectives for future electrocatalytic material development.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.