Abstract

Pt I~u and Ln-edges XANES clarified the oxidation state of platinum catalysts supported on various metal oxides.The acidbase property seemed one of the most dominant factors to control the electron state of platinum.On the reduced samples, there was a tendency that acidic support reduced the 5d-electron density of platinum, while the oxidized samples on acidic support contained more metallic platinum.The latter tendency agreed well with high activity of platinum catalysts on acidic supports toward propane combustion in oxidizing condition, and it was explained by a hypothetical mechanism for prevention of oxidation of platinum by acidic supports.

Keywords

XANESPlatinumCatalysisState (computer science)Oxidation stateChemistryChemical engineeringMaterials scienceComputer scienceSpectroscopyPhysicsOrganic chemistryEngineering

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Publication Info

Year
1999
Type
article
Volume
6
Issue
3
Pages
471-473
Citations
50
Access
Closed

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Hisao Yoshida, Yoshiteru Yazawa, Naoya Takagi et al. (1999). XANES study of the support effect on the state of platinum catalysts. Journal of Synchrotron Radiation , 6 (3) , 471-473. https://doi.org/10.1107/s0909049598017919

Identifiers

DOI
10.1107/s0909049598017919