Catalytic CO oxidation over PdAu(111) alloy surfaces: spectroscopic evidence for Pd ensemble dependent activity

Catalytic CO oxidation over Pd(111) and Pd 70 Au 30 (111) surfaces was investigated by in situ spectroscopic observations to understand the alloying effect. The reaction behaviour on Pd 70 Au 30 (111) is greatly different from that on Pd(111). Pd monomer and dimer ensembles can act as active centers...

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Published in:Chemical communications (Cambridge, England) England), 2017-11, Vol.53 (94), p.12657-1266
Main Authors: Toyoshima, Ryo, Hiramatsu, Nana, Yoshida, Masaaki, Amemiya, Kenta, Mase, Kazuhiko, Mun, Bongjin Simon, Kondoh, Hiroshi
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Summary:Catalytic CO oxidation over Pd(111) and Pd 70 Au 30 (111) surfaces was investigated by in situ spectroscopic observations to understand the alloying effect. The reaction behaviour on Pd 70 Au 30 (111) is greatly different from that on Pd(111). Pd monomer and dimer ensembles can act as active centers, whereas triangular-shaped trimers and larger ensembles are inactive. We report active Pd ensembles for catalytic CO oxidation over Pd 70 Au 30 (111) alloy surfaces by direct in situ spectroscopic observations.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc06809c