Redox behavior of the model catalyst Pd/CeO2-x/Pt(111)

被引：67

作者：

Wilson, E. L. ^{[1
]}

Grau-Crespo, R. ^{[1
]}

Pang, C. L. ^{[1
,2
]}

Cabailh, G. ^{[1
,2
]}

Chen, Q. ^{[1
,2
]}

Purton, J. A. ^{[3
]}

Catlow, C. R. A. ^{[1
]}

Brown, W. A. ^{[1
]}

de Leeuw, N. H. ^{[1
]}

Thornton, G. ^{[1
,2
]}

机构：

[1] UCL, Dept Chem, London WC1H 0AJ, England

[2] UCL, London Ctr Nanotechnol, London WC1H 0AJ, England

[3] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 29期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1021/jp8004103

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：

Photoelectron spectroscopy and scanning tunneling microscopy have been used to investigate how the oxidation state of Ce in CeO2-x(111) ultrathin films is influenced by the presence of Pd nanoparticles. Pd induces an increase in the concentration of Ce3+ cations, which is interpreted as charge transfer from Pd to CeO2-x(111) on the basis of DFT+U calculations. Charge transfer from Pd to Ce4+ is found to be energetically favorable even for individual Pd adatoms. These results have implications for our understanding of the redox behavior of ceria-based model catalyst systems.

引用

页码：10918 / 10922

页数：5