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
Author
Miyamoto, Kazunori The University of Tokushima
Kondo, Masaya The University of Tokushima
Yukumoto, Akira The University of Tokushima
Keywords
silica-supported platinum catalyst
in situ XANES
laboratory-type XAFS spectrometer
d-electron occupancy
Content Type
Journal Article
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.
Journal Title
BUNSEKI KAGAKU
ISSN
05251931
NCID
AN00222633
AA11681958
Publisher
日本分析化学会
Volume
64
Issue
12
Start Page
889
End Page
894
Published Date
2016-01-06
Rights
© The Japan Society for Analytical Chemistry 2015
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
Publisher
departments
Science and Technology