Characterization of metal-incorporated molecular sieves

被引：25

作者：

Chao, KJ ^{[1
]}

Wei, AC

Wu, HC

Lee, JF

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan

[2] Synchrontron Radiat Res Ctr, Hsinchu 300, Taiwan

来源：

CATALYSIS TODAY | 1999年 / 49卷 / 1-3期

关键词：

molecular sieves; metal-containing aluminophosphate;

D O I：

10.1016/S0920-5861(98)00434-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Metal-containing aluminophosphate molecular sieves (MeAPOs) were observed to exhibit remarkable catalytic activity in partial oxidation of hydrocarbons under mild condition. in this paper we review the spectroscopic characterization of framework incorporation and redox behavior of vanadium and cobalt in MeAPOs. EXAFS/XANES and XPS studies of the oxidation state and coordination of V and Co in as-prepared MeAPOs and after odor treatments will also be presented. These studies show that fourfold coordinated Co2+ Of CoAPO-11 was only partially oxidized to Co3+, while grafted V4+ Of VAPO-5 was almost completely oxidized to V5+ after calcination. All Co and V species remain in the AlPO4 framework during redox treatments. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：277 / 284

页数：8

共 42 条

[1] X-ray absorption spectroscopic study of Bronsted, Lewis, and redox centers in cobalt-substituted aluminum phosphate catalysts [J].