PARTICLE-SIZE STUDIES OF SUPPORTED METAL-CATALYSTS - A COMPARATIVE-STUDY BY X-RAY-DIFFRACTION, EXAFS AND ELECTRON-MICROSCOPY

被引：27

作者：

ASHCROFT, AT

CHEETHAM, AK

HARRIS, PJF

JONES, RH

NATARAJAN, S

SANKAR, G

STEDMAN, NJ

THOMAS, JM

机构：

[1] UNIV CALIF SANTA BARBARA, DEPT MAT, SANTA BARBARA, CA 93106 USA

[2] CHEM CRYSTALLOG LAB, OXFORD OX1 3PD, ENGLAND

[3] UCL ROYAL INST GREAT BRITAIN, DAVY FARADAY LAB, LONDON W1 4BX, ENGLAND

[4] UNIV KEELE, DEPT CHEM, KEELE ST5 5BG, STAFFS, ENGLAND

来源：

CATALYSIS LETTERS | 1994年 / 24卷 / 1-2期

关键词：

PARTICLE SIZE; X-RAY DIFFRACTION; ELECTRON MICROSCOPY; EXAFS; CATALYSTS;

D O I：

10.1007/BF00807374

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：

Supported ruthenium and iridium metal catalysts are studied by X-ray diffraction (XRD), EXAFS analysis and transmission electron microscopy (TEM). Estimates of the mean particle size from these techniques range from 20 to 25 angstrom from XRD, 13 to 16 angstrom from EXAFS and 25 to 32 angstrom from TEM. The strengths and weaknesses of these instrumental methods are discussed, as is the intrinsic comparability of these techniques. From a combination of these methods, the average particle size is estimated to be of the order of 20-30 angstrom.

引用

页码：47 / 57

页数：11

共 19 条

[1] EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE OF SMALL CU AND NI CLUSTERS - BINDING-ENERGY AND BOND-LENGTH CHANGES WITH CLUSTER SIZE [J].