| ID | 111231 |
| Title Alternative | Analysis of d-Electron State of Platinum Salts on Silica During Thermal Decomposition by a Laboratory-type X-ray Absorption Spectrometer : Choice of Parameters for in situ Experiments
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| Author |
Yamamoto, Takashi
The University of Tokushima
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Miyamoto, Kazunori
The University of Tokushima
Kondo, Masaya
The University of Tokushima
Yukumoto, Akira
The University of Tokushima
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| Keywords | silica-supported platinum catalyst
in situ XANES
laboratory-type XAFS spectrometer
d-electron occupancy
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| Content Type |
Journal Article
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| Description | The decomposition behavior of H2PtCl6 or Pt(NH3)4Cl2 supported on amorphous silica was investigated by X-ray absorption near edge spectroscopy using a laboratory-type spectrometer. The choice of a monochromator crystal, the slit width and the acquisition time for in situ measurements of catalyst samples is discussed. The whiteline intensities at the Pt L3 edge XANES did not always reflect on the oxidation state of the platinum species, but on the d-orbital occupancy, as pointed out previously. The changing behavior of the Pt d-orbital occupancy of platinum species on silica upon a thermal treatment in air was evaluated by Pt L2,3 edge XANES with Mansour’s method. Metallic platinum formed on silica after calcination at 773 K under air, but cationic platinum species were suggested to have remained.
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| Journal Title |
BUNSEKI KAGAKU
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| ISSN | 05251931
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| NCID | AN00222633
AA11681958
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| Publisher | 日本分析化学会
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| Volume | 64
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| Issue | 12
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| Start Page | 889
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| End Page | 894
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| Published Date | 2016-01-06
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| Rights | © The Japan Society for Analytical Chemistry 2015
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| EDB ID | |
| DOI (Published Version) | |
| URL ( Publisher's Version ) | |
| FullText File | |
| language |
jpn
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| TextVersion |
Publisher
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| departments |
Science and Technology
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