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Kato, Sho; Yamaki, Tetsuya; Yamamoto, Shunya; Hakoda, Teruyuki; Kawaguchi, Kazuhiro*; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
Ion implantation is a kind of technique to prepare nanoparticles. To prepare platinum (Pt) nanoparticle catalysts, it is very important to control their size. In this research, the process of particle growth was elucidated by in-situ transmission electron microscopy. In the experiment, glassy carbon substrates were implanted with 100 keV Pt ions at the fluences of 7
10
410
ions/cm
. The electrochemical etching was applied to expose the implanted layer. Finally, thermal treatment was conducted to form nanoparticles. Before the thermal treatment, the each implanted Pt were seemed to be monoatomic. When the temperature of the sample reached 375
C, the Pt atoms started to aggregate, and formed uniformly dispersed nanoparticles with diameters of 5 nm. This result indicated that the controllability of our nanoparticle preparation method is high enough to prepare the Pt nanoparticle for cathode catalysts in fuel cells.
Kato, Sho; Yamaki, Tetsuya; Yamamoto, Shunya; Hakoda, Teruyuki; Kawaguchi, Kazuhiro*; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
Pt nanoparticle catalysts prepared by ion implantation are expected to show high durability in fuel cell applications. In this research, the electrochemical stability of the Pt nanoparticles as oxygen reduction catalyst was evaluated.
Tanaka, Hisashi*; Chen, R.*; Asai, Miyuki*; Fukushima, Chikako*; Kawamoto, Toru*; Ishizaki, Manabu*; Kurihara, Masato*; Arisaka, Makoto; Nankawa, Takuya; Watanabe, Masayuki
no journal, ,
Hexacyanoferrate metal Complex (MHCF) is well-known as adsorption materials for Cesium ion. We have developed the effective processing method by making MHCF of nano particle ink. In this paper, we investigated the effect of the presence of other metal cations on electrochemical adsorption and desorption of cesium.