Low-temperature CO oxidation over Co3O4/Al2O3

被引：271

作者：

Jansson, J ^{[1
]}

机构：

[1] Chalmers Univ Technol, Competence Ctr Catalysis, Dept Chem React Engn, S-41296 Gothenburg, Sweden

来源：

JOURNAL OF CATALYSIS | 2000年 / 194卷 / 01期

关键词：

CO oxidation; low temperature; cobalt oxide; isotope-labeled oxygen; reaction mechanism; catalyst pretreatment; deactivation;

D O I：

10.1006/jcat.2000.2924

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 oxidation of CO over Co3O4/gamma-Al2O3 at room temperature (21 degrees C) has been studied in a continuous-flow reactor system with oxidising and reducing pretreatment, at varying stoichiometric ratios, and by using isotope-labeled O-18(2), The fresh catalyst was characterised by temperature-programmed reduction and temperature-programmed oxidation. CO deactivates the oxidised catalyst but the rate of deactivation can be suppressed by having a high O-2/CO ratio. The isotope study showed that the oxygen participating in the oxidation of CO comes from oxygen bound to the cobalt oxide surface. Finally, a mechanism for the CO oxidation over Co3O4/gamma-Al2O3 is proposed. (C) 2000 Academic Press.

引用

页码：55 / 60

页数：6

共 22 条

[1] TEMPERATURE-PROGRAMMED REDUCTION OF COO/AL2O3 CATALYSTS
ARNOLDY, P
MOULIJN, JA
[J]. JOURNAL OF CATALYSIS, 1985, 93 (01) : 38 - 54
[2] Boreskov G.K., 1982, CATALYSIS SCI TECHNO, V3, P39
[3] CHEMISORPTION STUDIES ON COBALT SINGLE-CRYSTAL SURFACES .1. CARBON-MONOXIDE ON CO(0001)
BRIDGE, ME
COMRIE, CM
LAMBERT, RM
[J]. SURFACE SCIENCE, 1977, 67 (02) : 393 - 404
[4] INFLUENCE OF DRY OPERATING-CONDITIONS - OBSERVATION OF OSCILLATIONS AND LOW-TEMPERATURE CO OXIDATION OVER CO3O4 AND AU/CO3O4 CATALYSTS
CUNNINGHAM, DAH
KOBAYASHI, T
KAMIJO, N
HARUTA, M
[J]. CATALYSIS LETTERS, 1994, 25 (3-4) : 257 - 264
[5] FTIR studies on the selective oxidation and combustion of light hydrocarbons at metal oxide surfaces .2. Propane and propene oxidation on Co3O4
Finocchio, E
Busca, G
Lerenzelli, V
Escribano, VS
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (09): : 1587 - 1593
[6] FTIR studies on the selective oxidation and combustion of light hydrocarbons at metal oxide surfaces .3. Comparison of the oxidation of C-3 organic compounds over Co3O4, MgCr2O4 and CuO
Finocchio, E
Willey, RJ
Busca, G
Lorenzelli, V
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (01): : 175 - 180
[7] CATALYTIC PROPERTIES AND SURFACE-STATES OF COBALT-CONTAINING OXIDATION CATALYSTS
GARBOWSKI, E
GUENIN, M
MARION, MC
PRIMET, M
[J]. APPLIED CATALYSIS, 1990, 64 (1-2): : 209 - 224
[8] OBSERVATION OF A DEUTERIUM KINETIC ISOTOPE EFFECT IN THE CHEMISORPTION AND REACTION OF METHANOL ON NI(111)
GATES, SM
RUSSELL, JN
YATES, JT
[J]. SURFACE SCIENCE, 1984, 146 (01) : 199 - 210
[9] LOW-TEMPERATURE OXIDATION OF CO OVER GOLD SUPPORTED ON TIO2, ALPHA-FE2O3, AND CO3O4
HARUTA, M
TSUBOTA, S
KOBAYASHI, T
KAGEYAMA, H
GENET, MJ
DELMON, B
[J]. JOURNAL OF CATALYSIS, 1993, 144 (01) : 175 - 192
[10] GOLD CATALYSTS PREPARED BY COPRECIPITATION FOR LOW-TEMPERATURE OXIDATION OF HYDROGEN AND OF CARBON-MONOXIDE
HARUTA, M
YAMADA, N
KOBAYASHI, T
IIJIMA, S
[J]. JOURNAL OF CATALYSIS, 1989, 115 (02) : 301 - 309

← 1 2 3 →