Evolution of Pd chemical states and effects of C3H6 and H2O on the CO oxidation over Pd/CeO2 catalyst - Details

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Abstract：

Determination　of　dynamic　changes　of　the　supported　Pd　catalysts　under　the　reaction　conditions　of　CO/Hydrocarbons　(HCs)　oxidation　is　of　great　importance　to　the　development　of　high　performance　catalysts　for　vehicle　exhaust　purification.　Here　we　found　that　Pd/CeO2　catalysts　dominated　with　either　PdO　or　Ce1−xPdxO2−δ　species,　obtained　by　modulating　the　interaction　between　the　Pd　precursors　and　the　CeO2　support　during　the　preparation,　show　different　dynamic　properties　under　the　conditions　of　CO　oxidation　and　also　different　deactivation　behaviors　when　C3H6　is　coexisting.　Under　the　CO　oxidation　condition,　the　PdO　species　can　be　easily　reduced　to　metallic　Pd,　whereas　the　Ce1−xPdxO2−δ　species　remain　mainly　as　ionic　Pd2+.　In　situ　IR　characterization　revealed　that　the　chemical　states　of　Pd　species　on　CeO2　during　CO　oxidation　were　related　to　their　redox　properties,　which　also　dramatically　affect　the　role　of　C3H6　and　H2O　in　the　reactions.　©　2022　Elsevier　B.V.

Keyword：

Redox reactions Palladium Cerium oxide Catalyst supports Oxidation Interface states

Author Community：

[ 1 ] [Wang, Mingzhi]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China
[ 2 ] [Ma, Peijie]Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Wu, Zhuangzhuang]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China
[ 4 ] [Chu, Shasha]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China
[ 5 ] [Zheng, Yanping]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China
[ 6 ] [Zhou, Zhaohui]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China
[ 7 ] [Weng, Weizheng]State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen; 361005, China

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Source ：

Applied Surface Science

ISSN： 0169-4332

Year： 2022

Volume： 599

6 . 7

JCR@2022

6 . 7 0 0

JCR@2022

ESI Discipline： MATERIALS SCIENCE;

ESI HC Threshold：66

JCR Journal Grade：1

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 14

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 6

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