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Aoyagi, Hisao
Bunseki, 1993(6), 452 Pages, 1993/00
no abstracts in English
;
J.Electroanal.Chem., 95(2), p.159 - 168, 1979/00
Times Cited Count：25no abstracts in English
Kimata, Tetsuya*; Kato, Sho*; Yamaki, Tetsuya; Yamamoto, Shunya; Hakoda, Teruyuki; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
Platinum (Pt) nanoparticles prepared by Pt-ion implantation in a glassy carbon (GC) substrate exhibited high durability as oxygen reduction catalyst. This result would originate from chemical and electronic interaction between the Pt atoms at the particle surface and the lattice defects in the GC substrate introduced by the ion implantation. We prepared Pt nanoparticles by RF magnetron sputtering on the GC substrate modified by Ar-ion irradiation, and then investigated the influence of Ar-ion irradiation on their electronic structure. X-ray photoelectron spectroscopy demonstrated that the formation of the Pt-C bonding at the interface was promoted by the pre-deposition Ar-ion irradiation of the GC substrate.
Yamaki, Tetsuya; Kato, Sho*; Yamamoto, Shunya; Hakoda, Teruyuki; Kawaguchi, Kazuhiro*; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*
no journal, ,
A glassy carbon (GC) substrate was implanted with 100 keV tungsten (W) and platinum (Pt) ions at different fluences in order to prepare nanoparticles of W-carbides and Pt-metal, respectively, with diameters of 
10 nm. We discuss a detailed study of compound formation and binding interaction resulting from the W or Pt implants in GC for the first time, emphasizing the importance of chemical effects in determining the final properties of the implanted layer. The chemical effects between the implanted species and the GC substrate were investigated mainly by X-ray photoelectron spectroscopy (XPS) while the morphological properties, i.e., the dispersion states of the implants or the size and shape of the precipitated nanoparticles, were observed by transmission electron microscopy (TEM).
Matsumura, Daiju; Okazaki, Hiroyuki*; Idesaki, Akira*; Ishii, Kenji*; Yamaki, Tetsuya*
no journal, ,
