INFRARED STUDY OF THE REACTION BETWEEN NITROGEN-OXIDES AND AMMONIA ON TITANIA-SUPPORTED VANADIA CATALYSTS

被引：33

作者：

DINES, TJ ^{[1
]}

ROCHESTER, CH ^{[1
]}

WARD, AM ^{[1
]}

机构：

[1] UNIV DUNDEE,DEPT CHEM,DUNDEE DD1 4HN,SCOTLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1991年 / 87卷 / 09期

关键词：

D O I：

10.1039/ft9918701473

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：

Infrared spectroscopy has been used to study sequential adsorption of ammonia and nitric oxide and of ammonia and nitrogen dioxide on three anatase-supported vanadia catalysts with different vanadia loadings. Facile reaction occurred between ammonium ions at Bronsted-acidic surface sites on vanadia and nitrato species formed by the adsorption of nitrogen dioxide or nitric oxide. Nitric oxide was less reactive because of depletion of surface oxygen during reaction. Pre-reduction of catalyst in hydrogen not only removed surface oxygen but also destroyed catalytically active Bronsted-acidic sites. A reaction mechanism involving an intermediate V-O-N = N species is tentatively proposed.

引用

页码：1473 / 1477

页数：5

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