Structural surface investigations of cerium-zirconium mixed oxide nanocrystals with enhanced reducibility

被引：34

作者：

Hernandez, Juan C.

Hungria, Ana B.

Perez-Omil, Jose A. ^{[1
]}

Trasobares, Susana

Bernal, Serafin

Midgley, Paul A.

Alavi, Ali

Calvino, Jose J.

机构：

[1] Univ Cadiz, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Puerto Real 11510, Spain

[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 26期

关键词：

D O I：

10.1021/jp072466a

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：

High-resolution electron microscopy, high-angle annular dark field images, electron tomography data, and density functional theory calculations are presented that show the occurrence of significant structural and surface modifications in a nanocrystalline sample of cerium-zirconium mixed oxide upon high-temperature reduction with hydrogen followed by mild oxidation. Our findings may lend further support to a recently proposed model in accordance with which the enhanced reducibility exhibited by the mixed oxide after this treatment is due to parallel modifications occurred in its surface chemistry.

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页码：9001 / 9004

页数：4

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