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

页码：25 / 29

页数：5

共 23 条

[1]

Beck DD, 1995, STUD SURF SCI CATAL, V96, P721

[2]

de Boer FR., 1988, COHESION METALS TRAN

[3] Microkinetic model studies of impurity effects on CO+O2, CO+NO and CO+NO+O2 reactions over supported Pt-Rh nanocatalysts [J].

De Sarkar, A ;

Khanra, BC .

CHEMICAL PHYSICS LETTERS, 2004, 384 (4-6) :339-343

[4]

De Sarkar A, 2002, CHEM PHYS LETT, V353, P426, DOI 10.1016/S0009-2614(02)00056-8

[5] MOLECULAR-BEAM INVESTIGATION OF CATALYTIC-OXIDATION OF CO ON PD (111) [J].

ENGEL, T ;

ERTL, G .

JOURNAL OF CHEMICAL PHYSICS, 1978, 69 (03) :1267-1281

[6] KINETIC OSCILLATIONS IN THE NO+CO REACTION ON PT(100) - EXPERIMENTS AND MATHEMATICAL-MODELING [J].

FINK, T ;

DATH, JP ;

IMBIHL, R ;

ERTL, G .

JOURNAL OF CHEMICAL PHYSICS, 1991, 95 (03) :2109-2126

[7] Automotive exhaust catalysis [J].

Gandhi, HS ;

Graham, GW ;

McCabe, RW .

JOURNAL OF CATALYSIS, 2003, 216 (1-2) :433-442

[8] SURFACE-COMPOSITION OF POLYCRYSTALLINE PD15RH FOLLOWING HIGH-TEMPERATURE OXIDATION IN AIR [J].

GRAHAM, GW ;

POTTER, T ;

BAIRD, RJ ;

GANDHI, HS ;

SHELEF, M .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1986, 4 (03) :1613-1616

[9] SURFACE-CHEMISTRY MODELS OF CARBON-MONOXIDE OXIDATION ON SUPPORTED PLATINUM CATALYSTS [J].

HERZ, RK ;

MARIN, SP .

JOURNAL OF CATALYSIS, 1980, 65 (02) :281-296

[10] Automotive catalytic converters: current status and some perspectives [J].

Kaspar, J ;

Fornasiero, P ;

Hickey, N .

CATALYSIS TODAY, 2003, 77 (04) :419-449

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