Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions

Ryo Toyoshima; Masaaki Yoshida; Yuji Monya; Kazuma Suzuki; Bongjin Simon Mun; Kenta Amemiya; Kazuhiko Mase; Hiroshi Kondoh

doi:10.1021/jz301404n

Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions

Ryo Toyoshima, Masaaki Yoshida, Yuji Monya, Kazuma Suzuki, Bongjin Simon Mun, Kenta Amemiya, Kazuhiko Mase, Hiroshi Kondoh

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

61 Citations (Scopus)

Abstract

Catalytic CO oxidation reaction on a Pd(100) single-crystal surface under several hundred mTorr pressure conditions has been studied by ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In-situ observation of the reaction reveals that two reaction pathways switch over alternatively depending on the surface temperature. At lower temperatures, the Pd(100) surface is covered by CO molecules and the CO ₂ formation rate is low, indicating CO poisoning. At higher temperatures above 190 °C, an O-Pd-O trilayer surface oxide phase is formed on the surface and the CO ₂ formation rate drastically increases. It is likely that the enhanced rate of CO ₂ formation is associated with an active oxygen species that is located at the surface of the trilayer oxide.

Original language	English
Pages (from-to)	3182-3187
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	3
Issue number	21
DOIs	https://doi.org/10.1021/jz301404n
Publication status	Published - 2012 Nov 1

ASJC Scopus subject areas

Materials Science(all)
Physical and Theoretical Chemistry

Access to Document

10.1021/jz301404n

Cite this

@article{bace329b34344f2ebd797e30f7349330,

title = "Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions",

abstract = "Catalytic CO oxidation reaction on a Pd(100) single-crystal surface under several hundred mTorr pressure conditions has been studied by ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In-situ observation of the reaction reveals that two reaction pathways switch over alternatively depending on the surface temperature. At lower temperatures, the Pd(100) surface is covered by CO molecules and the CO 2 formation rate is low, indicating CO poisoning. At higher temperatures above 190 °C, an O-Pd-O trilayer surface oxide phase is formed on the surface and the CO 2 formation rate drastically increases. It is likely that the enhanced rate of CO 2 formation is associated with an active oxygen species that is located at the surface of the trilayer oxide.",

author = "Ryo Toyoshima and Masaaki Yoshida and Yuji Monya and Kazuma Suzuki and Mun, {Bongjin Simon} and Kenta Amemiya and Kazuhiko Mase and Hiroshi Kondoh",

year = "2012",

month = nov,

day = "1",

doi = "10.1021/jz301404n",

language = "English",

volume = "3",

pages = "3182--3187",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

number = "21",

}

TY - JOUR

T1 - Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions

AU - Toyoshima, Ryo

AU - Yoshida, Masaaki

AU - Monya, Yuji

AU - Suzuki, Kazuma

AU - Mun, Bongjin Simon

AU - Amemiya, Kenta

AU - Mase, Kazuhiko

AU - Kondoh, Hiroshi

PY - 2012/11/1

Y1 - 2012/11/1

N2 - Catalytic CO oxidation reaction on a Pd(100) single-crystal surface under several hundred mTorr pressure conditions has been studied by ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In-situ observation of the reaction reveals that two reaction pathways switch over alternatively depending on the surface temperature. At lower temperatures, the Pd(100) surface is covered by CO molecules and the CO 2 formation rate is low, indicating CO poisoning. At higher temperatures above 190 °C, an O-Pd-O trilayer surface oxide phase is formed on the surface and the CO 2 formation rate drastically increases. It is likely that the enhanced rate of CO 2 formation is associated with an active oxygen species that is located at the surface of the trilayer oxide.

AB - Catalytic CO oxidation reaction on a Pd(100) single-crystal surface under several hundred mTorr pressure conditions has been studied by ambient pressure X-ray photoelectron spectroscopy and mass spectroscopy. In-situ observation of the reaction reveals that two reaction pathways switch over alternatively depending on the surface temperature. At lower temperatures, the Pd(100) surface is covered by CO molecules and the CO 2 formation rate is low, indicating CO poisoning. At higher temperatures above 190 °C, an O-Pd-O trilayer surface oxide phase is formed on the surface and the CO 2 formation rate drastically increases. It is likely that the enhanced rate of CO 2 formation is associated with an active oxygen species that is located at the surface of the trilayer oxide.

UR - http://www.scopus.com/inward/record.url?scp=84868109867&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868109867&partnerID=8YFLogxK

U2 - 10.1021/jz301404n

DO - 10.1021/jz301404n

M3 - Article

AN - SCOPUS:84868109867

SN - 1948-7185

VL - 3

SP - 3182

EP - 3187

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 21

ER -

Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this