Back Cover: Hydrogen Spillover and Its Relation to Hydrogenation: Observations on Structurally Defined Single‐Atom Sites (Angew. Chem. Int. Ed. 40/2022)

A palladium single-atom model catalyst was used by Ning Yan and co-workers in their Research Article (e202208237) to shed light on the kinetics and structural evolution of catalysts in hydrogen spillover, as well as the nature of participation of the spilled-over H in hydrogenation.