Oxidationless promotion of rapid oxygen during redox CO/(NO+O2) palladium redispersion by cycling

被引：27

作者：

Newton, Mark A.

Belver-Coldeira, Carolina

Martinez-Arias, Arturo

Fernandez-Garcia, Marcos

机构：

[1] European Synchrotron Radiat Facil, Grenoble, France

[2] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2007年 / 46卷 / 45期

关键词：

EXAFS spectroscopy; heterogeneous catalysis; nanoparticles; oxidation; palladium;

D O I：

10.1002/anie.200702134

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Figure Presented) The rapid and reversible dispersion of palladium nanoparticles is considerably enhanced if oxygen gas is present in the oxidizing step of the redox cycle. At 673 K oxidation of the Pd nanoparticles is too slow to compete with this dispersion and only occurs after the Pd particles undergo significant size/morphological alteration. Thus, catalyst dispersion and sintering could be controlled by dynamic feedstock management. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：8629 / 8631

页数：3

共 27 条

[1]

BINSTED N, 1988, EXCURV

[2]

Binsted N, 1988, PAXAS PROGRAMME ANAL

[3] KINETIC MODEL FOR SOLID-STATE REACTIONS [J].