Irreversible change in the NO adsorption state on Pt(111) under high pressure studied by AP-XPS, NEXAFS, and STM

Toru Shimada; Bongjin Simon Mun; Ikuyo F. Nakai; Atsushi Banno; Hitoshi Abe; Yasuhiro Iwasawa; Toshiaki Ohta; Hiroshi Kondoh

doi:10.1021/jp102777j

Irreversible change in the NO adsorption state on Pt(111) under high pressure studied by AP-XPS, NEXAFS, and STM

Toru Shimada
, Bongjin Simon Mun
, Ikuyo F. Nakai
, Atsushi Banno
, Hitoshi Abe
, Yasuhiro Iwasawa
, Toshiaki Ohta
, Hiroshi Kondoh

化学科

研究成果: Article › 査読

29 被引用数 (Scopus)

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Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has been applied to the investigation of NO adsorption on Pt(111) under various pressures of NO (up to 1 Torr) at room temperature. Under 10^-7 Torr, molecular NO occupies the most stable fcc-hollow sites and partially occupies the energetically unfavorable atop sites. NO reversibly desorbs from the atop sites after evacuation. At NO pressures higher than 10^-6 Torr, however, irreversible adsorption of atomic oxygen takes place via NO dissociation, leading to the formation of NO+O domains. This result is consistent with near-edge X-ray absorption fine structure (NEXAFS) and scanning tunneling microscopy (STM) results.

本文言語	English
ページ（範囲）	17030-17035
ページ数	6
ジャーナル	Journal of Physical Chemistry C
巻	114
号	40
DOI	https://doi.org/10.1021/jp102777j
出版ステータス	Published - 2010 10月 14

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
エネルギー一般
物理化学および理論化学
表面、皮膜および薄膜

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10.1021/jp102777j

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title = "Irreversible change in the NO adsorption state on Pt(111) under high pressure studied by AP-XPS, NEXAFS, and STM",

abstract = "Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has been applied to the investigation of NO adsorption on Pt(111) under various pressures of NO (up to 1 Torr) at room temperature. Under 10-7 Torr, molecular NO occupies the most stable fcc-hollow sites and partially occupies the energetically unfavorable atop sites. NO reversibly desorbs from the atop sites after evacuation. At NO pressures higher than 10-6 Torr, however, irreversible adsorption of atomic oxygen takes place via NO dissociation, leading to the formation of NO+O domains. This result is consistent with near-edge X-ray absorption fine structure (NEXAFS) and scanning tunneling microscopy (STM) results.",

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AU - Shimada, Toru

AU - Mun, Bongjin Simon

AU - Nakai, Ikuyo F.

AU - Banno, Atsushi

AU - Abe, Hitoshi

AU - Iwasawa, Yasuhiro

AU - Ohta, Toshiaki

AU - Kondoh, Hiroshi

PY - 2010/10/14

Y1 - 2010/10/14

N2 - Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has been applied to the investigation of NO adsorption on Pt(111) under various pressures of NO (up to 1 Torr) at room temperature. Under 10-7 Torr, molecular NO occupies the most stable fcc-hollow sites and partially occupies the energetically unfavorable atop sites. NO reversibly desorbs from the atop sites after evacuation. At NO pressures higher than 10-6 Torr, however, irreversible adsorption of atomic oxygen takes place via NO dissociation, leading to the formation of NO+O domains. This result is consistent with near-edge X-ray absorption fine structure (NEXAFS) and scanning tunneling microscopy (STM) results.

AB - Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has been applied to the investigation of NO adsorption on Pt(111) under various pressures of NO (up to 1 Torr) at room temperature. Under 10-7 Torr, molecular NO occupies the most stable fcc-hollow sites and partially occupies the energetically unfavorable atop sites. NO reversibly desorbs from the atop sites after evacuation. At NO pressures higher than 10-6 Torr, however, irreversible adsorption of atomic oxygen takes place via NO dissociation, leading to the formation of NO+O domains. This result is consistent with near-edge X-ray absorption fine structure (NEXAFS) and scanning tunneling microscopy (STM) results.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

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Irreversible change in the NO adsorption state on Pt(111) under high pressure studied by AP-XPS, NEXAFS, and STM

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