A bimetallic nanoparticle photocatalytic hydrogen evolution catalyst and a preparation method thereof

Abstract

This invention discloses a bimetallic nanoparticle photocatalytic hydrogen evolution catalyst and its preparation method, relating to the field of photocatalytic materials technology. The bimetallic nanoparticle photocatalytic hydrogen evolution catalyst is composed of a potassium-modified heterojunction composite support, iron nitrate nonahydrate, nickel nitrate hexahydrate, and citric acid monohydrate. The iron-nickel bimetallic nanoparticles are highly dispersed and tightly loaded on the potassium-modified heterojunction composite support, providing abundant catalytic active sites. The tight combination between the two ensures that photogenerated electrons can rapidly flow from the support to the metal, improving catalytic efficiency. Furthermore, through physical confinement effects and strong interactions between the metal and the support, the migration and aggregation of nanoparticles are effectively suppressed. In addition, the zero-valence or low-valence state of the metal active centers is maintained, inhibiting their oxidative deactivation, thereby significantly improving the stability of the catalyst.

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