Preparation method and application of a single-atom ni-modified auni alloy catalyst

Abstract

The present invention discloses a preparation method and application of a single-atom Ni-modified AuNi alloy catalyst. A simple and efficient one-step photodeposition method is employed, by which the formation of the AuNi alloy and the precise introduction of single-atom Ni on the surface of Au nanoparticles are synchronously achieved without the need for high-temperature annealing or treatment under a reducing atmosphere. The synergistic effect between the two not only significantly enhances the adsorption and activation of reactant molecules, but also effectively promotes the separation and transport of photogenerated charge carriers, thereby enabling the efficient conversion of products from CO to the high-value-added fuel CH4 in the CO2 reduction reaction. While reducing the usage of the noble metal Au, the catalyst prepared in the present invention substantially increases the number of catalytically active sites, and exhibits higher activity, selectivity, and stability during the catalytic process, fully demonstrating the broad application prospects of this material in the field of low-carbon conversion.