[1C01-05] Treatment of Radiolysis Gas 1

[1C02] R&D on reduction technologies of hydrogen generated in long-term waste storage containers

(8) Reaction mechanism of hydrogen recombination catalysts studied by synchrotron X-ray absorption spectroscopy

*Daiju Matsumura¹, Takuya Tsuji¹, Yasuo Nishihata¹, Ryutaro Hino¹, Masashi Taniguchi², Keisuke Takenaka³, Hitomi Ono³, Tomoaki Kita³, Hirohisa Tanaka³ (1. JAEA, 2. Daihatsu, 3. KG)

Keywords:Synchrotron radiation, XAFS, Recombination catalysts

In order to understand correlation between structure and function for hydrogen recombination catalysts, we observed in situ and time-resolved X-ray absorption fine structure of the catalysts at Pd K- and Pt L3-edges. We have found that the surface oxide layer of the metal nanoparticle plays an important role for the hydrogen recombination reaction.