Real-time and direct observation of hydrogen absorption dynamics for Pd nanoparticles

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

Materials Research Society Symposium Proceedings, Vol.1262, 6 Pages, 2010/05

Dynamic local structural change of Pd nanoparticles on alumina surface during hydrogen absorption process was directly observed by X-ray absorption fine structure spectroscopy with dispersive mode. Main four parameters of X-ray absorption spectroscopy were determined even in the case of 50 Hz observation. It is clearly revealed that Pd nanoparticles directly change to the hydride phase in 50 ms at 200 kPa of hydrogen pressure. Significant structural distortion was not investigated in the results of the Debye-Waller factor.