In situ and real-time XAFS study for the structure anad shape of Pd metal particles under CO/NO atmosphere

Matsumura, Daiju ; Okajima, Yuka; Nishihata, Yasuo; Mizuki, Junichiro; Taniguchi, Masashi*; Uenishi, Mari*; Tanaka, Hirohisa*

Dynamic structure changes of Pd metal particles on LaFeO $_{3}$ and Al $_{2}$ O $_{3}$ were observed by dispersive XAFS optics during successive gas change of CO/NO. Observation rate of 0.2 Hz for dispersive XAFS enabled us to study precise structure of Pd metal particles under oxidation-reduction, expansion-contraction and sintering-dispersion transformations during gas change. Especially, it was revealed that the Pd particles on Al $_{2}$ O $_{3}$ show faster reaction for expansion of lattice under CO atmosphere and inner oxidation under NO atmosphere than those on LaFeO $_{3}$ . Depending on the interaction between metal particle and support, many surface adsorption structure on Pd metal particles were influenced.

Language	:	Japanese
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Meeting title	:	日本物理学会2009年秋季大会(物性)
Held date	:	2009/09
Location (city)	:	熊本
Location (country)	:	日本
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Keywords	:	no keyword
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Cooperating Institute	:	ダイハツ工業

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Registration No. : BB20092213
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