TY - JOUR

T1 - Dynamic behaviour of platinum and copper dopants in gold nanoclusters supported on ceria catalysts

AU - Müller, Nicole

AU - Rares, Banu

AU - Loxha, Adea

AU - Schrenk, Florian

AU - Lindenthal, Lorenz

AU - Rameshan, Christoph

AU - Pittenauer, Ernst

AU - Llorca, Jordi

AU - Timoshenko, Janis

AU - Marini, Carlo

AU - Barrabés, Noelia

N1 - Publisher Copyright: © 2023, The Author(s).

PY - 2023/12/18

Y1 - 2023/12/18

N2 - 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 of atoms at different stages of catalyst evolution. These insights into the atomic dynamics at the different stages are crucial for the precise optimisation of catalysts, which ultimately enables improved catalytic performance.

AB - 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 of atoms at different stages of catalyst evolution. These insights into the atomic dynamics at the different stages are crucial for the precise optimisation of catalysts, which ultimately enables improved catalytic performance.

UR - http://www.scopus.com/inward/record.url?scp=85180245772&partnerID=8YFLogxK

U2 - 10.1038/s42004-023-01068-0

DO - 10.1038/s42004-023-01068-0

M3 - Article

VL - 2023

JO - Communications chemistry

JF - Communications chemistry

SN - 2399-3669

IS - 6

M1 - 277

ER -