CHARACTERIZATION BY XPS AND XAS OF SUPPORTED PT/TIO2-CEO2 CATALYSTS

被引：95

作者：

DAUSCHER, A

HILAIRE, L

LENORMAND, F

MULLER, W

MAIRE, G

VASQUEZ, A

机构：

[1] COMMISS EUROPEAN COMMUNITIES,JOINT RES CTR,B-2440 GEEL,BELGIUM

[2] UNIV NACL AUTONOMA MEXICO,INST FIS,MEXICO CITY 01000,MEXICO

来源：

SURFACE AND INTERFACE ANALYSIS | 1990年 / 16卷 / 1-12期

关键词：

D O I：

10.1002/sia.740160173

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：

TiO2 and CeO2 are will known for inducing strong metal‐support interactions J(SMSI) of a different nature when used as supports for Pt catalysts. X‐ray photoelectron spectroscopy analysis of mixtures of TiO2CeO2 oxide supports (80:20 and 20:80) reveals at the surface a remarkable stabilization of cerium in the +3 oxidation state; the stabilization is more pronounced with lower cerium oxide concentration. X‐ray absorption spectroscopy measurements done on the LIII edge show the same variation as a function of cerium oxide concentration, but in the bulk the reduction is much lower. Cerium in Pt/TiO2CeO2 catalysts exhibits the same behaviour. Copyright © 1990 John Wiley & Sons Ltd.

引用

页码：341 / 346

页数：6

共 20 条

[1] PT-TI ALLOY FORMATION FROM HIGH-TEMPERATURE REDUCTION OF A TITANIA-IMPREGNATED PT CATALYST - IMPLICATIONS FOR STRONG METAL SUPPORT INTERACTION [J].