SINTERING OF PT/AL2O3 REFORMING CATALYSTS - EXAFS STUDY OF THE BEHAVIOR OF METAL PARTICLES UNDER OXIDIZING ATMOSPHERE

被引：48

作者：

BORGNA, A

LENORMAND, F

GARETTO, T

APESTEGUIA, CR

MORAWECK, B

机构：

[1] CONSEJO NACL INVEST CIENT & TECN,INCAPE,SANTIAGO ESTERO 2654,RA-3000 SANTA FE,ARGENTINA

[2] INST RECH CATALYSE,CNRS,F-69626 VILLEURBANNE,FRANCE

[3] UNIV STRASBOURG 1,INST LE BEL,IPCMS,F-67070 STRASBOURG,FRANCE

来源：

CATALYSIS LETTERS | 1992年 / 13卷 / 03期

关键词：

EXAFS; PT/AL2O3; REFORMING CATALYST; SINTERING; PLATINUM OXIDE; TPR; CHEMISORPTION MEASUREMENTS;

D O I：

10.1007/BF00770989

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 effect of an oxidative atmosphere (300-degrees-C) is studied on fresh and sintered unchlorinated naphtha reforming catalysts containing 0.6-1% Pt. The TPR profiles show that only one species is formed using our experimental conditions, regardless of the mean crystallite size of the metal particles. The structural information supplied by EXAFS compared with cuboctahedral particle modeling, implies that such species is a surface platinum oxide, the structure of which is close to that of PtO2, but largely distorted. This is true whether the catalyst is sintered or not.

引用

页码：175 / 188

页数：14

共 21 条

[1] ON THE SULFUR-AIDED METAL SUPPORT INTERACTION IN PT/AL2O3-CL CATALYSTS [J].