An AES, UPS and HREELS study of the oxidation and reaction of NB(110)

被引：19

作者：

Wang, YS

Wei, XM

Tian, ZJ

Cao, YM

Zhai, RS

Ushikubo, T

Sato, K

Zhuang, SX

机构：

[1] DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA

[2] MITSUBISHI CHEM CORP,YOKOHAMA,KANAGAWA 227,JAPAN

[3] UNIV SCI & TECHNOL CHINA,DEPT CHEM PHYS,HEFEI 230026,PEOPLES R CHINA

来源：

SURFACE SCIENCE | 1997年 / 372卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

electron energy loss spectroscopy; niobium; oxidation;

D O I：

10.1016/S0039-6028(96)01253-8

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 oxidation of Nb(110) upon oxygen adsorption has been investigated using AES, UPS and HREELS. For low and medium exposures of oxygen, two new loss features at 720 and similar to 950 cm(-1) develop, which are assigned to Nb-O and Nb-O-Nb stretching vibrations, respectively. When oxygen exposure is high, a broad and strong loss peak at 600-900 cm(-1) appears, which is due to bulk-like Nb-O-Nb stretching vibrations, the changes in the vibrational spectroscopy suggest that, with increasing oxidation of the surface, NbO4 tetrahedra transform into NbO6 octahedra. Experiments involving methanol adsorption further confirm these results concerning the process of oxidation.

引用

页码：L285 / L290

页数：6

共 17 条

[1] CHARACTERIZATION OF THE ADSORPTION AND DECOMPOSITION OF METHANOL ON NI(110) [J].