High entropy alloy: From theoretical evaluation to electrocatalytic activity of hydrogen evolution reaction

The modern technical society aims to generate sustainable and reliable energy resources motivated by the energy-dense hydrogen (H2) economy. High entropy alloy (HEA) catalyst is a multi-metal composite that is considered as a key electrocatalytic material for superior electrochemical applications. However, the theoretical understanding and underlying mechanisms of the superior electrocatalytic activity of HEA are still unclear and largely unexplored. In this short review, we briefly discuss the theoretical and experimental aspects of HEA catalysts, followed by the importance of HEA catalysts in electrocatalytic hydrogen production. Finally, we propose some perspectives for the structural and electrochemical analysis of HEA catalysts for performance improvement and integration with other potential applications.