Effects of Ru or Rh Addition on the Activity and Sulfur Tolerance of Pt/ZrO2 for the Oxidation of Methane at Low Temperatures

被引：13

作者：

Ohtsuka, Hirofumi ^{[1
]}

机构：

[1] Osaka Gas Co Ltd, Energy Technol Labs, Konohana Ku, Osaka 5540051, Japan

来源：

CATALYSIS LETTERS | 2013年 / 143卷 / 10期

关键词：

Platinum; Methane; Catalytic oxidation; X-ray absorption fine structure; CATALYTIC COMBUSTION; PT-RU; PD; PLATINUM; REACTIVITY; EMISSIONS; ABATEMENT; SUPPORT; ALLOYS;

D O I：

10.1007/s10562-013-1056-9

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 effects of Ru or Rh addition on the catalytic oxidation of methane over Pt/ZrO2 were investigated at low temperatures under an oxidizing atmosphere. Adding Ru slightly improved the initial activity but significantly suppressed deactivation in the presence of SO2. Deactivation by SO2 was not observed using Ru-Pt/ZrO2 with Ru loadings of 2 wt% or higher. Adding Rh improved the initial activity significantly, but Rh-Pt/ZrO2 catalysts exhibited deactivation in the presence of SO2. Characterization of the catalysts revealed that the loaded Pt is maintained in a high oxidation state, similar to that of Pt4+, in Ru-Pt/ZrO2. These results suggest that the role of Ru is to maintain Pt in a high oxidation state in which Pt exhibits high activity for methane oxidation.

引用

页码：1043 / 1050

页数：8

共 24 条

[1] Platinum nanoparticles on Al2O3: Correlation between the particle size and activity in total methane oxidation [J].

Beck, Irene E. ;

Bukhtiyarov, Valerii I. ;

Pakharukov, Ilya Yu. ;

Zaikovsky, Vladimir I. ;

Kriventsov, Vladimir V. ;

Parmon, Valentin N. .

JOURNAL OF CATALYSIS, 2009, 268 (01) :60-67

[2] Role of the ceria-zirconia support in the reactivity of platinum and palladium catalysts for methane total oxidation under lean conditions [J].

Bozo, C ;

Guilhaume, N ;

Herrmann, JM .

JOURNAL OF CATALYSIS, 2001, 203 (02) :393-406

[3] INVESTIGATION OF PT/AL2O3 AND PD/AL2O3 CATALYSTS FOR THE COMBUSTION OF METHANE AT LOW CONCENTRATIONS [J].

BURCH, R ;

LOADER, PK .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1994, 5 (1-2) :149-164

[4]

Chaston J.C., 1975, PLATINUM METALS REV, V19, P135, DOI [10.1595/003214075X194135140, DOI 10.1595/003214075X194135140]

[5] Reactivity of Chemisorbed Oxygen Atoms and Their Catalytic Consequences during CH4-O2 Catalysis on Supported Pt Clusters [J].

Chin, Ya-Huei ;

Buda, Corneliu ;

Neurock, Matthew ;

Iglesia, Enrique .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (40) :15958-15978

[6] Catalysts for combustion of methane and lower alkanes [J].

Choudhary, TV ;

Banerjee, S ;

Choudhary, VR .

APPLIED CATALYSIS A-GENERAL, 2002, 234 (1-2) :1-23

[7] Low temperature oxidation of methane over Pd-based catalysts - effect of support oxide on the combustion activity [J].

Eguchi, K ;

Arai, H .

APPLIED CATALYSIS A-GENERAL, 2001, 222 (1-2) :359-367

[8] Complete oxidation of methane at low temperature over Pt and Pd catalysts for the abatement of lean-burn natural gas fuelled vehicles emissions:: influence of water and sulphur containing compounds [J].

Gélin, P ;

Urfels, L ;

Primet, M ;

Tena, E .

CATALYSIS TODAY, 2003, 83 (1-4) :45-57

[9] Complete oxidation of methane at low temperature over noble metal based catalysts:: a review [J].

Gélin, P ;

Primet, M .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 39 (01) :1-37

[10] A PHOTOEMISSION-STUDY OF THE OXIDATION OF PLATINUM IN PT-BASED ALLOYS - PT-PD, PT-RU, PT-IR [J].

HILAIRE, L ;

GUERRERO, GD ;

LEGARE, P ;

MAIRE, G ;

KRILL, G .

SURFACE SCIENCE, 1984, 146 (2-3) :569-582

← 1 2 3 →