CORRELATION BETWEEN CO FREQUENCY AND PT COORDINATION-NUMBER - A DRIFT STUDY ON SUPPORTED PT CATALYSTS

被引：179

作者：

KAPPERS, MJ

VANDERMAAS, JH

机构：

[1] Department of Analytical Molecule Spectrometry, Faculty of Chemistry, University of Utrecht, TB Utrecht, 3508

来源：

CATALYSIS LETTERS | 1991年 / 10卷 / 5-6期

关键词：

FTIR SPECTROSCOPY; DIFFUSE REFLECTANCE; SUPPORTED PLATINUM; CO ADSORPTION; METAL COORDINATION NUMBER;

D O I：

10.1007/BF00769171

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 infrared stretching frequencies of linear-bonded carbon monoxide on face, edge and corner atoms have been identified with four platinum catalysts. The metal particles were supported on different absorbentia and each having a different average particle size, ranging from about 10 to 200 angstrom. The nu-CO approximately values of the various absorption bands correlate linearly with the number of nearest neighbours of the different surface sites (n in C(n)). Effects of an interaction between Pt clusters and support on the linear-CO stretching frequency have not been observed. This empirical correlation between nu-CO approximately and C(n), and the advantages of in situ Diffuse Reflectance Fourier transform Infrared Spectroscopy in combination with derivative spectrometry opens the possibility to monitor the dispersity of supported platinum in a simple and relatively quick way.

引用

页码：365 / 373

页数：9

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