Nanoscale Design for High Entropy Alloy Electrocatalysts

Due to their distinctive physical and chemical characteristics, high entropy alloys (HEAs), a class of alloys comprising multiple elements, have garnered a lot of attention. It is demonstrated recently that HEA electrocatalysts increase the activity and stability of several processes. In this paper, the most recent developments in HEA electrocatalysts research are reviewed, and the performance of HEAs in catalyzing key reactions in water electrolysis and fuel cells is summarized. In addition, the design strategies for HEA electrocatalysts optimization is introduced, which include component selection, size optimization, morphology control, structural engineering, crystal phase regulation, and theoretical prediction, which can guide component selection and structural design of HEA electrocatalysts. To guide the design of high entropy alloy (HEA) electrocatalysts with high performance, this paper reviews the research progress of HEA electrocatalysts and puts forward the design strategies to improve the performance, including size optimization, component selection, morphology control, structural engineering, crystal phase regulation, and theoretical prediction. Additionally, the future development paths for HEA electrocatalysts are prospected.