Combined TPD and FTIR studies of Co/ZrO2 catalysts:: determination of the cobalt dispersion

被引：3

作者：

Hadjiivanov, K ^{[1
]}

Panayotov, D ^{[1
]}

Avreyska, V ^{[1
]}

Tsyntsarski, B ^{[1
]}

Klissurski, D ^{[1
]}

Marinova, T ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, BU-1113 Sofia, Bulgaria

来源：

SURFACE AND INTERFACE ANALYSIS | 2002年 / 34卷 / 01期

关键词：

cobalt; zirconia; temperature-programmed desorption; FTIR spectroscopy; nitrogen monoxide; adsorption;

D O I：

10.1002/sia.1259

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：

Adsorption of NO on cobalt catalysts supported on zirconia and sulphated zirconia results in the formation of three main types of species: Zr4+(SO42-)-NO and Zr4+(NO3-)-NO nitrosyls (infrared band at 1940-1906 cm(-1)), which are of low stability (temperature-programmed desorption maximum at 55-80degreesC); Co2+(NO)(2) geminal nitrosyls (set of bands at 1903-1868 and 1814-1777 cm(-1)) characterized by temperature-programmed desorption maxima at 90-100degreesC; and linear Con+-NO species (1942-1858 cm(-1)) desorbing at 120-140degreesC. On the basis of the results obtained, a simple temperature-programmed desorption technique for determination of the cobalt dispersion is developed. Copyright (C) 2002 John Wiley Sons, Ltd.

引用

页码：88 / 91

页数：4

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