STUDY ON THE OXIDATIVE COUPLING OF METHANE - XRD AND XPS STUDY OF TIO2-BASED CATALYSTS PROMOTED BY DIFFERENT ADDITIVES

被引：9

作者：

GONG, MC ^{[1
]}

ZHOU, JL ^{[1
]}

XU, ZH ^{[1
]}

CHEN, YQ ^{[1
]}

CHEN, Y ^{[1
]}

机构：

[1] SICHUAN UNIV,CTR ANALYT & TESTING,CHENGDU 610064,PEOPLES R CHINA

来源：

CATALYSIS TODAY | 1995年 / 24卷 / 03期

关键词：

D O I：

10.1016/0920-5861(95)00038-H

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The catalytic performance of Mn/TiO2, La-Mn/TiO2, Li-Mn/TiO2 and Li-La-Mn/TiO2 for the oxidative coupling of methane (OCM) was investigated. The catalysts were characterized with XRD and X-ray photoelectron spectroscopy (XPS). The results revealed that catalyst Li-La-Mn/TiO2 exhibited high activity and C-2 selectivity, Ti in this catalyst existed in the Ti(IV) state; Li could promote the formation of lanthanum titanate via the interaction of La and TiO2, the formed La2Ti2O7 and La-4 Ti9O24 distributed in the inner surface layer and Mn existed in the outer surface layer in low valence number. The high activity and C-2 selectivity of catalyst Li-La-Mn/TiO2 were intimately related to the valence number of Mn, Li, La and to their distribution on the catalyst surface layer.

引用

页码：259 / 261

页数：3