JOURNAL ARTICLE

A porous high‐entropy alloy for high‐efficient oxygen evolution reaction

Wei WangYunzhuo LuXing Lü

Year: 2023 Journal:   Rare Metals Vol: 42 (7)Pages: 2174-2181   Publisher: Springer Science+Business Media

Abstract

摘要 析氧反应(OER)在电解水制氢过程中起着至关重要的作用,急需一种高效、稳定、低成本的电催化剂。本文采用一种简单的选择性相溶解的方法,成功地制备了一种多孔的AlCoCrFeNi高熵合金(SPD‐48 h)。SPD‐48 h在1 mol·L ‐1 KOH碱性溶液中达到10 mA·cm ‐2 的电流密度时具有260 mV的过电位和58.0 mV·dec ‐1 的Tafel斜率。扫描电镜 (SEM)分析表明,经过10 h的计时电流测试后,微观结构没有变化,证实了SPD‐48 h的优异稳定性。多孔高熵合金优异的电催化性能不仅取决于合金自身的性能,也可以归因于其物理上独特的多孔结构。这些发现显示SPD‐48 h是有益OER的,因此,对制备高性能电催化剂的研究人员来说应该是有价值的。

Keywords:
Materials science Alloy Porosity Thermodynamics Oxygen Entropy (arrow of time) Metallurgy Composite material Physics

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62
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0.78
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Citation History

Topics

Electrocatalysts for Energy Conversion
Physical Sciences →  Energy →  Renewable Energy, Sustainability and the Environment
High Entropy Alloys Studies
Physical Sciences →  Engineering →  Mechanical Engineering
Catalytic Processes in Materials Science
Physical Sciences →  Materials Science →  Materials Chemistry
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