Controlled Preparation of High-entropy Alloys and Their Application in Electrocatalytic CO2Reduction Reaction

In recent years, the excessive consumption of non-renewable energy has led to a sharp increase in carbon dioxide levels in the air, causing numerous environmental issues. Therefore, developing new energy sources to replace coal, oil, and other renewable energies is urgently needed. High-entropy alloys (HEAs), as a novel material, can be used as catalysts for electrocatalytic CO2reduction reactions, addressing current energy crises and global warming problems. This article first introduces the unique properties of HEAs and why they can serve as catalysts in electrocatalytic CO2reduction reactions, focusing on the four major effects of HEAs. It then discusses three methods for preparing HEAs: carbon heat shock, electrochemical methods, and magnetron sputtering. The article highlights the advantages and disadvantages of each preparation method and reviews current research progress. Finally, it summarizes the applications of HEAs in electrocatalytic CO2reduction reactions from both noble metal-based and non-noble metal-based perspectives, emphasizing recent research advancements. This article aims to address shortcomings in related academic research and industrial applications, providing a reference for future preparation methods of HEAs and their use in electrocatalytic CO2reduction reactions.