TY - JOUR

T1 - Doped metal clusters as bimetallic AuCo nanocatalysts

T2 - insights into structural dynamics and correlation with catalytic activity by in situ spectroscopy

AU - Barrabés, Noelia

AU - Ostolaza, Jon

AU - Reindl, Sarah

AU - Mähr, Martin

AU - Schrenk, Florian

AU - Drexler, Hedda

AU - Rameshan, Christoph

AU - Olszewski, Wojciech

AU - Rupprechter, Günther

N1 - Publisher Copyright: © 2022 The Royal Society of Chemistry.

PY - 2022/7/13

Y1 - 2022/7/13

N2 - Co-doped Au25 nanoclusters with different numbers of doping atoms were synthesized and supported on CeO2. The catalytic properties were studied in the CO oxidation reaction. In all cases, an enhancement in catalytic activity was observed compared to the pure Au25 nanocluster catalyst. Interestingly, a different catalytic performance was obtained depending on the number of Co atoms within the cluster. This was related to the mobility of atoms within the cluster’s structure under pretreatment and reaction conditions, resulting in active CoAu nanoalloy sites. The evolution of the doped Au clusters into nanoalloys with well-distributed Co atoms within the Au cluster structure was revealed by combined XAFS, DRIFTS, and XPS studies. Overall, these studies contribute to a better understanding of the dynamics of doped nanoclusters on supports upon pretreatment and reaction, which is key information for the future development and application of bimetallic nanocluster (nanoalloy) catalysts.

AB - Co-doped Au25 nanoclusters with different numbers of doping atoms were synthesized and supported on CeO2. The catalytic properties were studied in the CO oxidation reaction. In all cases, an enhancement in catalytic activity was observed compared to the pure Au25 nanocluster catalyst. Interestingly, a different catalytic performance was obtained depending on the number of Co atoms within the cluster. This was related to the mobility of atoms within the cluster’s structure under pretreatment and reaction conditions, resulting in active CoAu nanoalloy sites. The evolution of the doped Au clusters into nanoalloys with well-distributed Co atoms within the Au cluster structure was revealed by combined XAFS, DRIFTS, and XPS studies. Overall, these studies contribute to a better understanding of the dynamics of doped nanoclusters on supports upon pretreatment and reaction, which is key information for the future development and application of bimetallic nanocluster (nanoalloy) catalysts.

UR - http://www.scopus.com/inward/record.url?scp=85141911034&partnerID=8YFLogxK

U2 - 10.1039/d2fd00120a

DO - 10.1039/d2fd00120a

M3 - Article

C2 - 36330869

AN - SCOPUS:85141911034

VL - 242.2023

JO - Faraday Discussions

JF - Faraday Discussions

SN - 1359-6640

ER -