Platinum-Based Catalyst for Diesel Hydrocarbon Oxidation

The catalytic performance of Pt-based catalysts for the total oxidation of hydrocarbons was investigated.The activity of supported Pt catalysts（Pt/Al2O3,Pt/ZrO2,Pt/TiO2,and Pt/H-ZSM-5）depends on the metal oxide support.Pt/Al2O3 showed the highest catalytic activity when the catalysts were aged at 75...

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Published inChinese journal of catalysis Vol. 32; no. 5; pp. 777 - 781
Main Authors HANEDA, Masaaki, SASAKI, Motoi, HAMADA, Hideaki, OZAWA, Masakuni
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2011
Subjects
alumina
Aluminum oxide
Catalysis
Catalysts
diesel oxidation catalyst
Hydrocarbons
Oxidation
Platinum
surface acid-base property
Surface chemistry
Titanium dioxide
valence state of platinum surface
surface acid-base property
valence state of platinum surface
platinum
alumina
diesel oxidation catalyst
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Summary:The catalytic performance of Pt-based catalysts for the total oxidation of hydrocarbons was investigated.The activity of supported Pt catalysts（Pt/Al2O3,Pt/ZrO2,Pt/TiO2,and Pt/H-ZSM-5）depends on the metal oxide support.Pt/Al2O3 showed the highest catalytic activity when the catalysts were aged at 750°C for 50 h in air.The activity of Pt/Al2O3 was dependent on the valence state of the Pt surface.Pt/Al2O3 with the Pt surface in the metallic state was more active than with the surface in the cationic state.The surface density of acid and basic sites on the Al2O3 support controlled the valence state of the Pt surface and stability of the Pt particles in the highly dispersed state,respectively.
Bibliography:Masaaki HANEDA,,Motoi SASAKI,Hideaki HAMADA,Masakuni OZAWA Ceramics Research Laboratory,Nagoya Institute of Technology,0-- Asahigaoka,Tajimi,Gifu 0-00,Japan Research Center for New Fuels and Vehicle Technology,National Institute of Advanced Industrial Science and Technology（AIST）, AIST Tsukuba Central 5,1-1-1 Higashi,Tsukuba,Ibaraki 305-8565,Japan
The catalytic performance of Pt-based catalysts for the total oxidation of hydrocarbons was investigated.The activity of supported Pt catalysts（Pt/Al2O3,Pt/ZrO2,Pt/TiO2,and Pt/H-ZSM-5）depends on the metal oxide support.Pt/Al2O3 showed the highest catalytic activity when the catalysts were aged at 750°C for 50 h in air.The activity of Pt/Al2O3 was dependent on the valence state of the Pt surface.Pt/Al2O3 with the Pt surface in the metallic state was more active than with the surface in the cationic state.The surface density of acid and basic sites on the Al2O3 support controlled the valence state of the Pt surface and stability of the Pt particles in the highly dispersed state,respectively.
21-1195/O6
diesel oxidation catalyst; platinum; alumina; valence state of platinum surface; surface acid-base property
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0253-9837
1872-2067
1872-2067
DOI:10.1016/s1872-2067(10)60192-1