4.7 Article

Flower-like HEA/MoS2/MoP heterostructure based on interface engineering for efficient overall water splitting

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 77, 页码 29969-29981

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2023.04.132

关键词

High-entropy alloys; Interface engineering; Hydrogen evolution reaction; Oxygen evolution reaction; Heterogeneous structure

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In this study, a heterogeneous structured electrode based on FeAlCrMoV high-entropy alloy was synthesized for hydrogen and oxygen evolution reactions in alkaline media. It exhibited excellent electrocatalytic performance with low overpotential. This work provides a new strategy for heterogeneous structure construction and overall water splitting based on high-entropy alloys.
The development of cheap, efficient, and active non-noble metal electrocatalysts for total hydrolysis of water (oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)) is of great significance to promote the application of water splitting. Herein, a heterogeneous structured electrode based on FeAlCrMoV high-entropy alloy (HEA) was synthesized as a cost-effective electrocatalyst for hydrogen and oxygen evolution reactions in alkaline media. In combination of the interfacial synergistic effect and the high-entropy coordination environment, flower-like HEA/MoS2/MoP exhibited the excellent HER and OER electrocatalytic performance. It showed a low overpotential of 230 mV at the current density of 10 mA cm-2 for OER and 148 mV for HER in alkaline electrolyte, respectively. Furthermore, HEA/MoS2/MoP as both anode and cathode also exhibited an overpotential of 1.60 V for overall water splitting. This work provides a new strategy for heterogeneous structure construction and overall water splitting based on high-entropy alloys.& COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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