Synthesis, electronic and chemical properties of MoOx clusters on Au(111)

被引：25

作者：

Chang, ZP ^{[1
]}

Song, Z ^{[1
]}

Liu, G ^{[1
]}

Rodriguez, JA ^{[1
]}

Hrbek, J ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

来源：

SURFACE SCIENCE | 2002年 / 512卷 / 1-2期

关键词：

gold; molybdenum; molybdenum oxides; nitrogen oxides; surface chemical reaction; synchrotron radiation photoelectron; spectroscopy;

D O I：

10.1016/S0039-6028(02)01495-4

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：

A novel procedure for the synthesis of molybdenum oxide nanoparticles has been developed. Mo nanoparticles were prepared on Au(1 1 1) by dissociation Of MO(CO)(6) molecules at 500 K. These Mo nanoparticles were found inactive towards oxygen according to results of synchrotron-based high-resolution photoelectron spectroscopy (PES). There was no sign of molybdenum oxide formation after an exposure to 150 L of oxygen at 300-850 K. However, these Mo nanoparticles can be oxidized by reaction with NO2 at 500 K to form molybdenum oxides, MoO2 or MoO3. The stability of the MoO3 particles upon annealing was further investigated by PES. The fully oxidized MoO3 clusters do not react with ethylene. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：L353 / L360

页数：8

共 39 条

[1] LOCAL SITE SYMMETRY OF DISPERSED MOLYBDENUM OXIDE CATALYSTS - XANES AT THE MO L2,3-EDGES [J].