CO oxidation and NO reduction over supported Pt-Rh and Pd-Rh nanocatalysts: a comparative study

被引：16
|
作者：
De Sarkar, A [1 ]
Khanra, B [1 ]
机构：
[1] Saha Inst Nucl Phys, Condensed Matter Phys Grp, Kolkata 700064, W Bengal, India
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2005年 / 229卷 / 1-2期
关键词：
nanocatalysts; Monte-Carlo (MC) simulation; microkinetic model; three-way catalysts;
D O I：
10.1016/j.molcata.2004.10.052
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 surface compositions of supported Pt50Rh50 and Pd50Rh50 three-way catalysts (TWC) have been simulated by Monte-Carlo (MC) technique and used for calculating the activity of the catalysts for CO oxidation and NO reduction. Pd-Rh shows a higher activity than Pt-Rh for CO oxidation in presence of O-2, while Pt-Rh is a better CO oxidation catalyst in absence of 0,. For NO reduction, Pt-Rh nanoparticles are better catalysts both in presence and absence of O-2. beta-N-2 is found to be the most dominant channel for N-2 formation on Pt-Rh nanoparticles, while, delta-N-2 is found to be the most dominant pathway for N-2 production on Pd-Rh. The poisoning effect of sulphur is found to be more on Pd-Rh catalyst than on Pt-Rh catalyst. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：25 / 29
页数：5
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