Electron microscopy (HREM, EELS) study of the reoxidation conditions for recovery of NM/CeO2 (NM: Rh, Pt) catalysts from decoration or alloying phenomena

被引：26

作者：

Bernal, S

Blanco, G

Calvino, JJ

López-Cartes, C

Pérez-Omil, JA

Gatica, JM

Stephan, O

Colliex, C

机构：

[1] Univ Cadiz, Fac Ciencias, Dept Ciencia Mat Ingn Met & Quim Inorgan, Cadiz, Spain

[2] Univ Paris 11, Phys Solides Lab, CNRS, URA 002, F-91405 Orsay, France

来源：

CATALYSIS LETTERS | 2001年 / 76卷 / 3-4期

关键词：

NM/CeO2; catalysts; recovery from strong metal-support interaction; reoxidation temperature; HREM and EELS studies;

D O I：

10.1023/A:1012241327903

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 reversibility of metal-support interaction effects in NM/CeO2 catalysts (NM: Rh, Pt) is investigated using high-resolution electron microscopy and electron energy loss spectroscopy. Reoxidation treatments at 773 K followed by a mild reduction at 473 K are not effective in recovering ceria-based systems from the decorated or alloyed states observed upon high-temperature reduction (T-red > 973 K).

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页码：131 / 137

页数：7

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