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稲川 康平*; 松村 大樹; 谷口 昌司*; 上垣 伸弥*; 中山 智仁*; 浦野 純乃介*; 青谷 拓朗*; 田中 裕久*
Journal of Physical Chemistry C, 127(24), p.11542 - 11549, 2023/06
被引用回数：0 パーセンタイル：0(Chemistry, Physical)Passive autocatalytic recombiner (PAR) represents a potential technology for ensuring process safety in the hydrogen society. PARs function through the catalytic oxidation of generated or leaked hydrogen, facilitating its conversion into water and effectively mitigating the risk of hydrogen explosions. CO is recognized as a catalyst poison that hampers surface catalytic reactions. To investigate the negative effects of CO on the local structure of platinum metal nanoparticle catalysts during water formation, in situ and time-resolved X-ray absorption spectroscopy analyses were conducted. The results revealed that the Pt-Fe/CZY catalyst exhibited notable hydrogen oxidation activity even in the presence of CO. The enhanced performance can be attributed to the combined effects of Pt-Fe alloy composition and CZY support materials.
吉本 政弘; 植野 智晶; 富樫 智人; 竹田 修; 金澤 謙一郎; 渡辺 真朗; 山崎 良雄; 神谷 潤一郎; 高柳 智弘; 倉持 勝也; et al.
IEEE Transactions on Applied Superconductivity, 18(2), p.297 - 300, 2008/06
被引用回数：4 パーセンタイル：30.85(Engineering, Electrical & Electronic)There are seven septum magnets for the beam injection and extraction at the RCS in J-PARC. In design of the septum magnets, the most important is that the magnetic leakage field outside the septum will disappear, but it is difficult in fact. In order to reduce the leakage field from the septum magnets at the beam orbit in the ring, the silicon steel sheets are set at the outside of the septum magnets as the magnetic shields. However sufficient spaces to set the thick magnetic shields are not securable at the divergent duct areas. Therefore the vacuum chambers are made by the magnetic stainless steel and the leakage fields in the chambers can be reduced. As results of the 3D field calculations by TOSCA, the magnetic leakage field can be suppressed to a few Gauss or less.
