ID 111231
タイトル別表記
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
著者
宮本, 一範 徳島大学
近藤, 正哉 徳島大学
行本, 晃 徳島大学
キーワード
silica-supported platinum catalyst
in situ XANES
laboratory-type XAFS spectrometer
d-electron occupancy
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
分析化学
ISSN
05251931
cat書誌ID
AN00222633
AA11681958
出版者
日本分析化学会
64
12
開始ページ
889
終了ページ
894
発行日
2016-01-06
権利情報
© The Japan Society for Analytical Chemistry 2015
EDB ID
304648
出版社版DOI
出版社版URL
フルテキストファイル
言語
jpn
著者版フラグ
出版社版
部局
理工学系