Dynamic behaviour of platinum and copper dopants in gold nanoclusters supported on ceria catalysts.

ABSTRACT: Understanding the behaviour of active catalyst sites at the atomic level is crucial for optimizing catalytic performance. Here, the evolution of Pt and Cu dopants in Au₂₅ clusters on CeO₂ supports is investigated in the water-gas shift (WGS) reaction, using operando XAFS and DRIFTS. Different behaviour is observed for the Cu and Pt dopants during the pretreatment and reaction. The Cu migrates and builds clusters on the support, whereas the Pt creates single-atom active sites on the surface of the cluster, leading to better performance. Doping with both metals induces strong interactions and pretreatment and reaction conditions lead to the growth of the Au clusters, thereby affecting their catalytic behaviour. This highlights importance of understanding the behaviour o

SUBMITTER: Muller N 

PROVIDER: S-EPMC10728199 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature