Reaction of CO oxidation on platinum, rhodium, a platinum-rhodium alloy, and a heterophase bimetallic platinum/rhodium surface

被引：6
|
作者：
Kalinkin, A. V. [1 ]
Pashis, A. V. [1 ]
Bukhtiyarov, V. I. [1 ]
机构：
[1] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia
来源：
KINETICS AND CATALYSIS | 2007年 / 48卷 / 02期
关键词：
D O I：
10.1134/S0023158407020152
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 reaction of CO oxidation on thin metal films of platinum, rhodium, and their alloy and on a heterophase bimetallic Pt/Rh surface that consisted of platinum particles of size 10-20 nm on the surface of rhodium was studied in the region of low reactant pressures (lower than 2 x 10(-5) mbar). At low temperatures (T < 200 degrees C), the activity of samples increased in the order Rh > Pt/Rh > Pt-Rh alloy > Pt. Above 200 degrees C, the rate of reaction on the heterophase Pt/Rh surface was almost twice as high as the sum of the rates of reaction on the individual metals; this fact is indicative of a synergistic effect. The nature of this effect is considered.
引用
收藏
页码：298 / 304
页数：7
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