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Tang, J.*; Seo, O.*; Rivera Rocabado, D. S.*; Koitaya, Takanori*; Yamamoto, Susumu*; Namba, Yusuke*; Song, C.*; Kim, J.*; Yoshigoe, Akitaka; Koyama, Michihisa*; et al.
Applied Surface Science, 587, p.152797_1 - 152797_8, 2022/06
Times Cited Count：7 Percentile：77.62(Chemistry, Physical)The hydrogen absorption and diffusion mechanisms on cube-shaped Pd nanoparticles (NPs) which are important hydrogen-storage materials were studied using X-ray photoelectron spectroscopy and DFT calculations. In the surface region, hydrogen absorption showed almost similar behavior regardless of the NPs size. It was found that the octahedral sites are more favorable than the tetrahedral sites for hydrogen occupation. We also clarified that the hydrogen atoms absorbing on the smaller-sized Pd NPs diffuse to the subsurface more actively because of the weakened Pd-H bond by the surface disordering, which plays an important role in hydrogen adsorption at a low H
pressure.
Senzaki, Masao; Inoue, Naoko; Kuno, Yusuke; Namba, Takashi
Proceedings of International Conference on Advanced Nuclear Fuel Cycle; Sustainable Options & Industrial Perspectives (Global 2009) (CD-ROM), p.2128 - 2132, 2009/09
The development program of the FR cycle system incorporating nuclear nonproliferation technologies has been conducted in Japan mainly by the Japan Atomic Energy Agency (JAEA). Four areas which are critical in acquiring international acceptance are identified. They are (1) technology that enhances proliferation resistance, (2) advanced safeguards technology, (3) development of proliferation resistance evaluation methodology, and (4) nuclear security and physical protection technology. In each area, close communication between the nuclear energy system and process designers and experts on nuclear nonproliferation safeguards and proliferation resistance is critical for the developed system to be recognized to be proliferation resistant and robust against proliferation threats.
