A wide-pH value efficient water decomposition nanoporous heterogeneous phase high-entropy alloy catalyst constructed by nanoclusters and a preparation method and application thereof

Abstract

This invention provides a wide-pH, high-efficiency water-splitting nanoporous heterogeneous high-entropy alloy catalyst constructed from nanoclusters, its preparation method, and its applications. The high-entropy alloy catalyst comprises, by atomic percentage, 5-35% Cu, 5-35% Ag, 5-35% Au, and 5-35% M, wherein M is any one of (PtPd), (IrRu), and (PtPdIrRu). The microstructure of the heterogeneous high-entropy alloy catalyst exhibits a bicontinuous nanoporous structure, including ligatures and pores, with ligature thickness of 2-3 nm and pore diameter of 5-6 nm. The crystal structure is an ordered / disordered heterogeneous phase structure. Further, the ligature structure is composed of numerous ultrafine-grained nanoalloy clusters, each cluster having a diameter of 2-3 nm. The bicontinuous nanoporous structure and the ordered / disordered heterogeneous phase structure composed of numerous nano-alloy clusters in the high-entropy alloy catalyst greatly improve the electrochemical active area, enabling this type of catalyst to exhibit excellent hydrogen evolution and oxygen evolution catalytic activity in electrolytes with pH values ​​of 0-14 when used as a working electrode.

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