SURFACE-ACTIVE SITES OF V2O5-WO3 CATALYSTS

被引：80

作者：

SATSUMA, A ^{[1
]}

HATTORI, A ^{[1
]}

MIZUTANI, K ^{[1
]}

FURUTA, A ^{[1
]}

MIYAMOTO, A ^{[1
]}

HATTORI, T ^{[1
]}

MURAKAMI, Y ^{[1
]}

机构：

[1] JGC CORP,KINUURA RES DEPT,HANDA,AICHI 475,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1988年 / 92卷 / 21期

关键词：

Spectroscopic analysis - Tungsten compounds - Vanadium compounds;

D O I：

10.1021/j100332a042

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 surface active sites of V2O5-WO3 catalysts were investigated by means of secondary ion mass spectrometry (SIMS), IR spectroscopy of adsorbed NH3, temperature-programmed desorption (TPD) of NH3, and the NARP (NO-NH3 rectangular pulse) technique, and the bulk and surface of the catalysts were characterized by means of X-ray diffraction (XRD), IR, electron spin resonance (ESR), and X-ray photoelectron spectroscopy (XPS). It was concluded that the redox sites on V2O5-WO3 catalysts are are not only the surface V=O species but also the surface W=O species interacting with vanadium ions. As for the acid sites examined by TPD of NH3, both the surface concentration and the strength are not changed by the addition of WO3.

引用

页码：6052 / 6058

页数：7

共 72 条

[41] CATALYTIC REACTIONS ON WELL-CHARACTERIZED VANADIUM-OXIDE CATALYSTS .2. OXIDATION OF ETHYLENE [J].