INFLUENCE OF METAL-PARTICLE SIZE AND EFFECT OF GOLD ADDITION ON THE ACTIVITY AND SELECTIVITY OF PT/AL2O3 CATALYSTS IN THE REDUCTION OF NITRIC-OXIDE BY METHANE

被引：40

作者：

DEMICHELI, MC ^{[1
]}

HOANG, LC ^{[1
]}

MENEZO, JC ^{[1
]}

BARBIER, J ^{[1
]}

PINABIAUCARLIER, M ^{[1
]}

机构：

[1] GAS FRANCE,CTR ETUDES & RECH SCI & TECH APPL,DIRECT ETUDES & TECH NOUVELLES,F-93211 LA PLAINE ST DENI,FRANCE

来源：

APPLIED CATALYSIS A-GENERAL | 1993年 / 97卷 / 01期

关键词：

GOLD; METAL PARTICLE SIZE; METHANE; NITRIC OXIDE; PLATINUM ALUMINA; REDUCTION;

D O I：

10.1016/0926-860X(93)80060-4

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 catalytic reduction of nitric oxide by methane over alumina supported platinum and Pt Au catalysts was investigated using a gas mixture of 2 vol.-% NO and CH4 in helium at 250-350-degrees-C. With monometallic platinum catalysts, the specific reaction rate was found to increase with increasing particle sizes from 1.5 to 15 nm, indicating that the reaction can occur preferentially on large platinum planes. This result was confirmed through addition of gold selectively deposited on the edges and corners of platinum particles. The selectivity pattern obtained suggests that the formation of strongly adsorbed species (NO22-) is favoured on small platinum particles of higher oxidation state.

引用

页码：L11 / L17

页数：7

共 20 条

[1] CHEMISORPTION AND FTIR STUDY OF BIMETALLIC PT-AU/SIO2 CATALYSTS
BALAKRISHNAN, K
SACHDEV, A
SCHWANK, L
[J]. JOURNAL OF CATALYSIS, 1990, 121 (02) : 441 - 455
[2] INFLUENCE OF CARRIER AND OXYGEN TREATMENT ON THE CATALYTIC BEHAVIOR OF SUPPORTED PLATINUM-GOLD ALLOYS
DEJONGSTE, HC
PONEC, V
[J]. JOURNAL OF CATALYSIS, 1980, 64 (01) : 228 - 231
[3] DOMINGUEZ JM, UNPUB
[4] FAKCHE A, 1991, THESIS POITIERS U
[5] EFFECT OF MULTIPLE SITES AND COMPETITION IN ADSORPTION ON KINETICS OF REACTIONS CATALYZED BY METALS
FRENNET, A
LIENARD, G
CRUCQ, A
DEGOLS, L
[J]. JOURNAL OF CATALYSIS, 1978, 53 (01) : 150 - 163
[6] CHEMISORPTION AND EXCHANGE WITH DEUTERIUM OF METHANE ON METALS
FRENNET, A
[J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1974, 10 (01): : 37 - 68
[7] GALVAGNO S, 1979, J CATAL, V55, P272
[8] NITRIC-OXIDE REDUCTION BY METHANE OVER RH/AL2O3 CATALYSTS
HARDEE, JR
HIGHTOWER, JW
[J]. JOURNAL OF CATALYSIS, 1984, 86 (01) : 137 - 146
[9] HU YA, 1975, THESIS RICE U
[10] HU YH, 1977, KINET KATAL, V18, P545

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