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

Research output: Contribution to journalArticle

45 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 languageEnglish
Pages (from-to)3182-3187
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume3
Issue number21
DOIs
Publication statusPublished - 2012 Nov 1

Fingerprint

Catalytic oxidation
Carbon Monoxide
Oxygen
oxidation
oxygen
Oxides
oxides
poisoning
Single crystal surfaces
crystal surfaces
surface temperature
mass spectroscopy
Temperature
photoelectron spectroscopy
X ray photoelectron spectroscopy
Switches
Spectroscopy
Reactive Oxygen Species
single crystals
Molecules

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions. / Toyoshima, Ryo; Yoshida, Masaaki; Monya, Yuji; Suzuki, Kazuma; Mun, Bongjin Simon; Amemiya, Kenta; Mase, Kazuhiko; Kondoh, Hiroshi.

In: Journal of Physical Chemistry Letters, Vol. 3, No. 21, 01.11.2012, p. 3182-3187.

Research output: Contribution to journalArticle

Toyoshima, Ryo ; Yoshida, Masaaki ; Monya, Yuji ; Suzuki, Kazuma ; Mun, Bongjin Simon ; Amemiya, Kenta ; Mase, Kazuhiko ; Kondoh, Hiroshi. / Active surface oxygen for catalytic CO oxidation on Pd(100) proceeding under near ambient pressure conditions. In: Journal of Physical Chemistry Letters. 2012 ; Vol. 3, No. 21. pp. 3182-3187.
@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 = "11",
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

VL - 3

SP - 3182

EP - 3187

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 21

ER -