Irreversible Change in the NO Adsorption State on Pt(111) under High Pressure Studied by AP-XPS, NEXAFS, and STM

被引：24

作者：

Shimada, Toru ^{[2
]}

Mun, Bongjin Simon ^{[3
]}

Nakai, Ikuyo F. ^{[4
]}

Banno, Atsushi ^{[5
]}

Abe, Hitoshi ^{[1
]}

Iwasawa, Yasuhiro ^{[6
]}

Ohta, Toshiaki ^{[7
]}

Kondoh, Hiroshi ^{[1
]}

机构：

[1] Keio Univ, Dept Chem, Yokohama, Kanagawa 2238522, Japan

[2] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

[3] Hanyang Univ, Dept Appl Phys, ERICA, Seoul 426791, South Korea

[4] Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan

[5] Univ Tokyo, Grad Sch Sci, Dept Chem, Tokyo 1130033, Japan

[6] Univ Electrocommun, Dept Appl Phys & Chem, Tokyo 1828585, Japan

[7] Ritsumeikan Univ, SR Ctr, Shiga 5258577, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 40期

关键词：

FINE-STRUCTURE SPECTROSCOPY; SCANNING-TUNNELING-MICROSCOPY; HIGH-RESOLUTION XPS; RH(111) SURFACES; NITRIC-OXIDE; COVERAGE; AG(111); NO/PT(111); PRECURSOR; RU(001);

D O I：

10.1021/jp102777j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 or atomic oxygen takes place via NO dissociation, leading to the formation of NO+C) domains. This result is consistent with near-edge X-ray absorption fine structure (NIHXAFS) and scanning tunneling microscopy (STM) results.

引用

页码：17030 / 17035

页数：6

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