ADSORPTION AND DISSOCIATION OF NO ON PT(100) AND (310) STUDIED BY AES, UPS AND XPS

被引：41

作者：

SUGAI, S ^{[1
]}

TAKEUCHI, K ^{[1
]}

BAN, T ^{[1
]}

MIKI, H ^{[1
]}

KAWASAKI, K ^{[1
]}

KIOKA, T ^{[1
]}

机构：

[1] SCI UNIV TOKYO,FAC ENGN,SHINJUKU KU,TOKYO 162,JAPAN

来源：

SURFACE SCIENCE | 1993年 / 282卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(93)90610-V

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：

Adsorption states of nitric oxide on Pt(100) and Pt(310) surfaces were studied by Auger electron spectroscopy (AES), ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS). The molecular NO and the dissociated N and O atoms coexist on both the platinum surfaces at room temperature. As the temperature rises, a part of the molecules desorbs quickly and another part decomposes into N and O up to 420 K for Pt(100) and 400 K for Pt(310). The N atoms desorb as N2 up to 420 K. A part of the dissociated O atoms penetrates into a few atomic layers of the platinum crystals up to about 600 K, and they diffuse back to the surface with the thermal desorption of O2 at higher temperatures. The Pt(310) surface is slightly more active for the N-O bond breaking than Pt(100), and less than Pt(410).

引用

页码：67 / 75

页数：9

共 18 条

[1] A MODEL FOR THE PLANE TO PLANE VARIATIONS IN CATALYTIC ACTIVITY SEEN DURING NITRIC-OXIDE DECOMPOSITION ON PLATINUM [J].