200 Hz observation of hydrogenation reaction of Pd nanoparticles by using dispersive XAFS optics

分散型XAFS光学系を使用したPd微粒子の水素化反応の200Hz観測

松村 大樹   ; 岡島 由佳*; 西畑 保雄; 水木 純一郎

Matsumura, Daiju; Okajima, Yuka*; Nishihata, Yasuo; Mizuki, Junichiro

Palladium is well known to show high performance for the hydrogen storage materials. We have observed the X-ray absorption fine structure (XAFS) spectra with dispersive optics in order to understand the size effect of the Pd particles concerning the hydrogen storage process. XAFS spectra were observed at BL14B1 of SPring-8 by dispersive mode. Pd-Pd interatomic distance was expanded by about 0.1 due to the hydrogen absorption reaction at room temperature. We also observed increase of Debye-Waller factor while hydrogen absorption reaction proceeds.