Pd oxidation under UHV in a model Pd/ceria-zirconia catalyst

被引：60
|
作者：
Smirnov, MY
Graham, GW
机构：
[1] Ford Motor Co, Res Lab, Dearborn, MI 48121 USA
[2] Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源：
CATALYSIS LETTERS | 2001年 / 72卷 / 1-2期
关键词：
palladium; ceria-zirconia; oxygen storage; automotive exhaust catalyst;
D O I：
10.1023/A:1009092005849
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：
A model planar catalyst was prepared by depositing Pd onto a thick (few mum) film of ceria-zirconia in ultrahigh vacuum (UHV), and the oxidation state of Pd and its support was determined by X-ray photoelectron spectroscopy, following thermal treatments in UHV, oxygen, or carbon monoxide. It was found that Pd could be oxidized simply by heating the catalyst in UHV, indicating that transfer of oxygen from the support to the metal is both thermodynamically favorable and facile.
引用
收藏
页码：39 / 44
页数：6
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