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].
