Angular distributions of desorbing N2 in thermal N2O decomposition on Rh(100)

被引：8
|
作者：
Matsushima, Tatsuo [1 ]
Kokalj, Anton
机构：
[1] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan
[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia
来源：
SURFACE SCIENCE | 2007年 / 601卷 / 18期
基金：
日本学术振兴会;
关键词：
thermal desorption; nitrous oxide; rhodium; surface chemical reaction; angle-resolved DIET; catalysis; density-functional theory calculations;
D O I：
10.1016/j.susc.2007.04.037
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：
The angular distribution of desorbing N-2 was studied in the decomposition of N2O(a) on Rh(100) at 60-140 K by means of angle-resolved temperature-programmed desorption. N-2 desorption shows two peaks at around 80 K and 110 K. At low N2O coverage, the former collimates far from the surface normal toward the [0 0 1] direction, whereas at high coverage, the desorption sharply collimates along the surface normal. The adsorption form of N2O and its dissociation were also examined by DFT-GGA calculations. Dissociating N2O is proposed to be lying along the [0 0 1] direction at low coverage and to change to an upright form bonding through the terminal oxygen at high coverage. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：3996 / 4000
页数：5
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