CO oxidation over promoted Pt catalysts

被引：117

作者：

Mergler, YJ ^{[1
]}

vanAalst, A ^{[1
]}

vanDelft, J ^{[1
]}

Nieuwenhuys, BE ^{[1
]}

机构：

[1] LEIDEN UNIV, LEIDEN INST CHEM, GORLAEUS LABS, NL-2300 RA LEIDEN, NETHERLANDS

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1996年 / 10卷 / 04期

关键词：

CO oxidation; Pt-only catalyst; activity; models; ageing;

D O I：

10.1016/S0926-3373(96)00017-3

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：

A study of CO oxidation by O-2 over Pt catalysts, promoted by MnOx and CoOx, is described. The activities of Pt/SiO2, Pt/MnOx/SiO2 and Pt/CoOx/SiO2 are compared with commercial Pt/Al2O3, Pt/Rh/Al2O3 and Pt/CeOx/Al2O3 catalysts. Since these catalysts differ in dispersion and weight loading of platinum, the turnover frequencies are also compared. The following order in activity in CO oxidation after a reductive pretreatment is found: Pt/CoOx/SiO2 > Pt/MnOx/SiO2, Pt/CeOx/Al2O3 > Pt/Al2O3, Pt/Rh/Al2O3, Pt/SiO2. Over Pt/CoOx/SiO2 CO is already oxidised at room temperature. Possible models to account for the high activity of Pt/CoOx/SiO2 in the CO/O-2 reaction are presented and discussed. Partially reduced metal oxides are necessary to increase the activity of the Pt/CoOx/SiO2, Pt/MnOx/SiO2 or Pt/CeOx/Al2O3 catalysts. It was shown that mild ageing treatments did not affect the activity of the Pt/CoOx/SiO2 catalyst in CO oxidation.

引用

页码：245 / 261

页数：17

共 41 条

[1] CO CHEMISORPTION ON THE [111] AND [100] ORIENTED SINGLE-CRYSTAL SURFACES OF THE ALLOY COPT3
BARDI, U
BEARD, BC
ROSS, PN
[J]. JOURNAL OF CATALYSIS, 1990, 124 (01) : 22 - 29
[2] BIELANSKI A, 1991, OXYGEN CATALYSIS, V7, P211
[3] EFFECTS OF SUPPORT ON THE ADSORPTION AND DISSOCIATION OF CO AND ON THE REACTIVITY OF SURFACE CARBON ON RH CATALYSTS
ERDOHELYI, A
SOLYMOSI, F
[J]. JOURNAL OF CATALYSIS, 1983, 84 (02) : 446 - 460
[4] COMPARISON OF THE PERFORMANCE-CHARACTERISTICS OF PT/SNOX AND AU/MNOX CATALYSTS FOR LOW-TEMPERATURE CO OXIDATION
GARDNER, SD
HOFLUND, GB
UPCHURCH, BT
SCHRYER, DR
KIELIN, EJ
SCHRYER, J
[J]. JOURNAL OF CATALYSIS, 1991, 129 (01) : 114 - 120
[5] Geus J. W., 1967, Dutch Pat. Appl., Patent No. [6705,259, 6705259]
[6] Harrison B., 1988, PLATINUM METALS REV, V32, P73
[7] ALLOYING IN PLATINUM-BASED CATALYSTS FOR GASOLINE REFORMING - A GENERAL STRUCTURAL PROPOSAL
JOYNER, RW
SHPIRO, ES
[J]. CATALYSIS LETTERS, 1991, 9 (3-4) : 239 - 244
[8] USE OF NOBLE-METALS IN AUTOMOBILE EXHAUST CATALYSTS
KUMMER, JT
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (20) : 4747 - 4752
[9] CATALYTIC-OXIDATION OF CO ON RH/SIO2 - A RAPID-RESPONSE FOURIER-TRANSFORM INFRARED TRANSIENT STUDY
LI, YE
GONZALEZ, RD
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (06) : 1589 - 1595
[10] Maire F, 1995, STUD SURF SCI CATAL, V96, P749

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