Fully Exposed Cu Clusters with Ru Single Atoms Synergy for High-Performance Acetylene Semihydrogenation

exchange and temperature-programmed desorption (TPD) experiments reveal that Ru modification significantly enhances the hydrogen dissociation ability of the catalyst while tuning acetylene adsorption. Density functional theory (DFT) calculations further demonstrate that the Ru single atoms and Cu nanoclusters create a synergistic catalytic interface that markedly promotes hydrogen activation and lowers the energy barrier of the rate-determining step. This study provides fundamental insights into the rational design of atomically dispersed bimetallic catalysts and offers a new strategy for the efficient and selective acetylene hydrogenation.