High-entropy alloy electrocatalysts go to (sub-)nanoscale

高熵合金 材料科学 电催化剂 纳米技术 合金 纳米材料基催化剂 纳米尺度 纳米颗粒 冶金 化学 物理化学 电化学 电极
作者
Menggang Li,Fangxu Lin,Shipeng Zhang,Rui Zhao,Lu Tao,Lu Li,Junyi Li,Lingyou Zeng,Mingchuan Luo,Shaojun Guo
出处
期刊:Science Advances [American Association for the Advancement of Science]
卷期号:10 (23) 被引量:26
标识
DOI:10.1126/sciadv.adn2877
摘要

Alloying has proven power to upgrade metallic electrocatalysts, while the traditional alloys encounter limitation for optimizing electronic structures of surface metallic sites in a continuous manner. High-entropy alloys (HEAs) overcome this limitation by manageably tuning the adsorption/desorption energies of reaction intermediates. Recently, the marriage of nanotechnology and HEAs has made considerable progresses for renewable energy technologies, showing two important trends of size diminishment and multidimensionality. This review is dedicated to summarizing recent advances of HEAs that are rationally designed for energy electrocatalysis. We first explain the advantages of HEAs as electrocatalysts from three aspects: high entropy, nanometer, and multidimension. Then, several structural regulation methods are proposed to promote the electrocatalysis of HEAs, involving the thermodynamically nonequilibrium synthesis, regulating the (sub-)nanosize and anisotropic morphologies, as well as engineering the atomic ordering. The general relationship between the electronic structures and electrocatalytic properties of HEAs is further discussed. Finally, we outline remaining challenges of this field, aiming to inspire more sophisticated HEA-based nanocatalysts.
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