Catalytic CO oxidation over Pd70Au30(111) alloy surfaces: spectroscopic evidence for Pd ensemble dependent activity

Ryo Toyoshima; Nana Hiramatsu; Masaaki Yoshida; Kenta Amemiya; Kazuhiko Mase; Bongjin Simon Mun; Hiroshi Kondoh

doi:10.1039/C7CC06809C

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Catalytic CO oxidation over Pd₇₀Au₃₀(111) alloy surfaces: spectroscopic evidence for Pd ensemble dependent activity†

Ryo Toyoshima,^a Nana Hiramatsu,^a Masaaki Yoshida,^a Kenta Amemiya,^b Kazuhiko Mase,^b Bongjin Simon Mun^c and Hiroshi Kondoh

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
E-mail: kondoh@chem.keio.ac.jp
Tel: +81-45-566-1701

^b Institute of Materials Structure Science, High Energy Accelerator Research Organization, and The Graduate University for Advanced Studies, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

^c Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea

Abstract

Catalytic CO oxidation over Pd(111) and Pd₇₀Au₃₀(111) surfaces was investigated by in situ spectroscopic observations to understand the alloying effect. The reaction behaviour on Pd₇₀Au₃₀(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.

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Article information

DOI: https://doi.org/10.1039/C7CC06809C
Article type: Communication
Submitted: 30 Aug 2017
Accepted: 03 Nov 2017
First published: 13 Nov 2017

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Chem. Commun., 2017,53, 12657-12660

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Catalytic CO oxidation over Pd₇₀Au₃₀(111) alloy surfaces: spectroscopic evidence for Pd ensemble dependent activity

R. Toyoshima, N. Hiramatsu, M. Yoshida, K. Amemiya, K. Mase, B. S. Mun and H. Kondoh, Chem. Commun., 2017, 53, 12657 DOI: 10.1039/C7CC06809C

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