Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy: Change of reaction path accompanying phase transition of O domains

Ikuyo Nakai; Hiroshi Kondoh; Toru Shimada; Andrea Resta; Jesper N. Andersen; Toshiaki Ohta

doi:10.1063/1.2205856

Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy: Change of reaction path accompanying phase transition of O domains

Ikuyo Nakai, Hiroshi Kondoh, Toru Shimada, Andrea Resta, Jesper N. Andersen, Toshiaki Ohta

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

54 Citations (Scopus)

Abstract

We studied the mechanism of CO oxidation on O-precovered Pd(111) surfaces by means of fast x-ray photoelectron spectroscopy (XPS). The oxygen overlayer is compressed upon CO coadsorption from a p (2×2) structure into a (3×3) R30° structure and then into a p (2×1) structure with increasing CO coverage. These three O phases exhibit distinctly different reactivities. (1) The p (2×2) phase does not react with CO unless the surface temperature is sufficiently high (<290 K). (2) In the (3×3) R30° phase, the reaction occurs exclusively at island peripheries. CO molecules in a high-density phase formed under CO exposure react with oxygen atoms, leading to quite a small apparent activation energy. (3) The reaction proceeds uniformly over the islands in the p (2×1) phase.

Original language	English
Article number	224712
Journal	Journal of Chemical Physics
Volume	124
Issue number	22
DOIs	https://doi.org/10.1063/1.2205856
Publication status	Published - 2006 Jun 14
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Access to Document

10.1063/1.2205856

Cite this

Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy: Change of reaction path accompanying phase transition of O domains. / Nakai, Ikuyo; Kondoh, Hiroshi; Shimada, Toru et al.
In: Journal of Chemical Physics, Vol. 124, No. 22, 224712, 14.06.2006.

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

@article{dee9bb0f9177431890a4e321f3422572,

title = "Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy: Change of reaction path accompanying phase transition of O domains",

abstract = "We studied the mechanism of CO oxidation on O-precovered Pd(111) surfaces by means of fast x-ray photoelectron spectroscopy (XPS). The oxygen overlayer is compressed upon CO coadsorption from a p (2×2) structure into a (3×3) R30° structure and then into a p (2×1) structure with increasing CO coverage. These three O phases exhibit distinctly different reactivities. (1) The p (2×2) phase does not react with CO unless the surface temperature is sufficiently high (<290 K). (2) In the (3×3) R30° phase, the reaction occurs exclusively at island peripheries. CO molecules in a high-density phase formed under CO exposure react with oxygen atoms, leading to quite a small apparent activation energy. (3) The reaction proceeds uniformly over the islands in the p (2×1) phase.",

author = "Ikuyo Nakai and Hiroshi Kondoh and Toru Shimada and Andrea Resta and Andersen, {Jesper N.} and Toshiaki Ohta",

note = "Funding Information: The authors acknowledge experimental help by Dr. Sven Stoltz and the MAX-lab staff and helpful discussions with Dr. Hideo Orita. The authors thank Dr. Sang Hoon Kim for showing us Ref. before publication. The present work is supported by the Grant-in-Aid for Scientific Research (KAKENHI) in Priority Area “Molecular Nano Dynamics” from Ministry of Education, Culture, Sports, Science and Technology. The authors are grateful for the 21st century COE Program. One of the authors (I.N.) appreciates the JSPS Research Fellowship for Young Scientists.",

year = "2006",

month = jun,

day = "14",

doi = "10.1063/1.2205856",

language = "English",

volume = "124",

journal = "Journal of Chemical Physics",

issn = "0021-9606",

publisher = "American Institute of Physics Publising LLC",

number = "22",

}

TY - JOUR

T1 - Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy

T2 - Change of reaction path accompanying phase transition of O domains

AU - Nakai, Ikuyo

AU - Kondoh, Hiroshi

AU - Shimada, Toru

AU - Resta, Andrea

AU - Andersen, Jesper N.

AU - Ohta, Toshiaki

N1 - Funding Information: The authors acknowledge experimental help by Dr. Sven Stoltz and the MAX-lab staff and helpful discussions with Dr. Hideo Orita. The authors thank Dr. Sang Hoon Kim for showing us Ref. before publication. The present work is supported by the Grant-in-Aid for Scientific Research (KAKENHI) in Priority Area “Molecular Nano Dynamics” from Ministry of Education, Culture, Sports, Science and Technology. The authors are grateful for the 21st century COE Program. One of the authors (I.N.) appreciates the JSPS Research Fellowship for Young Scientists.

PY - 2006/6/14

Y1 - 2006/6/14

N2 - We studied the mechanism of CO oxidation on O-precovered Pd(111) surfaces by means of fast x-ray photoelectron spectroscopy (XPS). The oxygen overlayer is compressed upon CO coadsorption from a p (2×2) structure into a (3×3) R30° structure and then into a p (2×1) structure with increasing CO coverage. These three O phases exhibit distinctly different reactivities. (1) The p (2×2) phase does not react with CO unless the surface temperature is sufficiently high (<290 K). (2) In the (3×3) R30° phase, the reaction occurs exclusively at island peripheries. CO molecules in a high-density phase formed under CO exposure react with oxygen atoms, leading to quite a small apparent activation energy. (3) The reaction proceeds uniformly over the islands in the p (2×1) phase.

AB - We studied the mechanism of CO oxidation on O-precovered Pd(111) surfaces by means of fast x-ray photoelectron spectroscopy (XPS). The oxygen overlayer is compressed upon CO coadsorption from a p (2×2) structure into a (3×3) R30° structure and then into a p (2×1) structure with increasing CO coverage. These three O phases exhibit distinctly different reactivities. (1) The p (2×2) phase does not react with CO unless the surface temperature is sufficiently high (<290 K). (2) In the (3×3) R30° phase, the reaction occurs exclusively at island peripheries. CO molecules in a high-density phase formed under CO exposure react with oxygen atoms, leading to quite a small apparent activation energy. (3) The reaction proceeds uniformly over the islands in the p (2×1) phase.

UR - http://www.scopus.com/inward/record.url?scp=33745124351&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745124351&partnerID=8YFLogxK

U2 - 10.1063/1.2205856

DO - 10.1063/1.2205856

M3 - Article

AN - SCOPUS:33745124351

SN - 0021-9606

VL - 124

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 22

M1 - 224712

ER -

Mechanism of CO oxidation reaction on O-covered Pd(111) surfaces studied with fast x-ray photoelectron spectroscopy: Change of reaction path accompanying phase transition of O domains

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this