Vicinal Na+ as structure guardians of atomically dispersed Ru catalysts in hydrogenation reactions

摘要

Owing to the distinctive structural and electronic properties,atomically dispersed metal catalysts have raised tremendous attentions in the last ten years[1,2].Generally,isolated metal atoms or clusters that dispersed across oxide supports(e.g.,Al2O3,TiO2,CeO2)are stabilized through the coordination with supported O atoms,forming electron-deficient metal cations(Mδ+-O)at interfaces[3].However,in many cases,such metal-support interactions may not strong enough to maintain their structure uniformity under harsh reductive conditions,and the resultant reduction/aggregation of metal atoms/clusters often attenuated the activity of catalysts[4,5].