Analysis of reaction mechanisms and kinetics of preferential CO oxidation over Au/γ-Al2O3

被引：11

作者：

Davran-Candan, Tugba ^{[1
]}

Demir, Mehtap ^{[1
]}

Yildirim, Ramazan ^{[1
]}

机构：

[1] Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkey

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2011年 / 104卷 / 02期

关键词：

Preferential CO oxidation; Gold catalysts; Au/gamma-Al2O3; Reaction mechanism; Reaction kinetics; LOW-TEMPERATURE OXIDATION; GOLD-BASED CATALYSTS; SELECTIVE OXIDATION; CARBON-MONOXIDE; AU CATALYSTS; AU/TIO2; OXYGEN; H-2; AU(PPH3)(NO3); NANOPARTICLES;

D O I：

10.1007/s11144-011-0370-8

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：

In this work, the mechanism and kinetics of the preferential CO oxidation over 0.5 wt. % Au/Al2O3 catalyst was investigated. For CO oxidation, the reaction was found to follow a two-step Eley-Rideal-type mechanism, in which the formation and decomposition of the reaction intermediate took place at the gold-support interface. For the PROX case, on the other hand, Langmuir-Hinshelwood-type mechanisms seem to be also significant.

引用

页码：389 / 398

页数：10

共 30 条

[1] Kinetics of CO Oxidation Catalyzed by Supported Gold: A Tabular Summary of the Literature [J].

Aguilar-Guerrero, Veronica ;

Gates, Bruce C. .

CATALYSIS LETTERS, 2009, 130 (1-2) :108-120

[2] A kinetic and DRIFTS study of low-temperature carbon monoxide oxidation over Au-TiO2 catalysts [J].

Bollinger, MA ;

Vannice, MA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 8 (04) :417-443

[3] Influence of dihydrogen and water vapor on the kinetics of CO oxidation over Au/Al2O3 [J].

Calla, JT ;

Davis, RJ .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2005, 44 (14) :5403-5410

[4] Cobalt promotion of Au/TiO2 catalysts for the reaction of carbon monoxide with oxygen and nitrogen oxides [J].

Cant, NW ;

Ossipoff, NJ .

CATALYSIS TODAY, 1997, 36 (01) :125-133

[5] CO oxidation on supported nano-Au catalysts synthesized from a [Au6(PPh3)6](BF4)2 complex [J].

Choudhary, TV ;

Sivadinarayana, C ;

Chusuei, CC ;

Datye, AK ;

Fackler, JP ;

Goodman, DW .

JOURNAL OF CATALYSIS, 2002, 207 (02) :247-255

[6] Nature of the active site for CO oxidation on highly active Au/γ-Al2O3 [J].

Costello, CK ;

Kung, MC ;

Oh, HS ;

Wang, Y ;

Kung, HH .

APPLIED CATALYSIS A-GENERAL, 2002, 232 (1-2) :159-168

[7] Selective CO oxidation over promoted Au/γ-Al2O3 catalysts in the presence of CO2 and H2O in the feed [J].

Davran-Candan, Tugba ;

Tezcanli, Sadi T. ;

Yildirim, Ramazan .

CATALYSIS COMMUNICATIONS, 2011, 12 (12) :1149-1152

[8] Reaction pathway analysis for CO oxidation over anionic gold hexamers using DFT [J].

Davran-Candan, Tugba ;

Aksoylu, A. Erhan ;

Yildirim, Ramazan .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2009, 306 (1-2) :118-122

[9] Trends in the catalytic CO oxidation activity of nanoparticles [J].

Falsig, Hanne ;

Hvolbaek, Britt ;

Kristensen, Iben S. ;

Jiang, Tao ;

Bligaard, Thomas ;

Christensen, Claus H. ;

Norskov, Jens K. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (26) :4835-4839

[10] On the mechanism of selective CO oxidation on nanosized Au/γ-Al2O3 catalysts [J].

Gavril, D. ;

Georgaka, A. ;

Loukopoulos, V. ;

Karaiskakis, G. ;

Nieuwenhuys, B. E. .

GOLD BULLETIN, 2006, 39 (04) :192-199

← 1 2 3 →