Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Seiho Sugawara"'
Autor:
Xiao Gao, Kentaro Yamamoto, Tomoyasu Hirai, Noboru Ohta, Tomoki Uchiyama, Toshiki Watanabe, Hideto Imai, Seiho Sugawara, Kazuhiko Shinohara, Yoshiharu Uchimoto
Publikováno v:
ACS Omega, Vol 6, Iss 22, Pp 14130-14137 (2021)
Externí odkaz:
https://doaj.org/article/0c016be3dcfe4dfa8456d8c056c8acc1
Autor:
Seiho Sugawara, Shota Katayama
Publikováno v:
Denki Kagaku. 89:53-65
Autor:
Yoshiharu Uchimoto, Shigeki Sakurai, Syota Katayama, Noriyuki Nagata, Tomoki Uchiyama, Chen Liu, Xiao Gao, Koichiro Oshima, Toshiki Watanabe, Kentaro Yamamoto, Kazuhiko Shinohara, Seiho Sugawara, Hideto Imai, Masazumi Arao
Publikováno v:
ACS Applied Energy Materials. 4:1143-1149
The influence of specific adsorption of the sulfo group in the perfluorosulfonic acid ionomer, Nafion, on the oxygen reduction reaction (ORR) of a carbon-supported Pt/C catalyst using a thin-film r...
Autor:
Tomoki Uchiyama, Chen Liu, Xiao Gao, Kentaro Yamamoto, Seiho Sugawara, Hideto Imai, Koichiro Oshima, Shigeki Sakurai, Masashi Matsumoto, Kazuhiko Shinohara, Toshiki Watanabe, Yoshiharu Uchimoto
Publikováno v:
ACS Applied Energy Materials. 4:810-818
The oxygen reduction reaction (ORR) activity and the coverage of oxide species over a Pd core–Pt shell catalyst on carbon support (Pt/Pd/C) with various Pd core sizes (2.3, 4.3, and 8.0 nm) were in...
Autor:
Yoshiharu Uchimoto, Kentaro Yamamoto, Takanori Itoh, Masakuni Takahashi, Hideto Imai, Hajime Tanida, Kazuhiko Shinohara, Koji Ohara, Seiho Sugawara, Tomoki Uchiyama
Publikováno v:
Bulletin of the Chemical Society of Japan. 93:37-42
The correlation between the Pt–Pt interatomic distance of a Pt/C catalyst and the specific activity of the oxygen reduction reaction is discussed. Total X-ray scattering measurement coupled with pa...
Autor:
Seiho Sugawara, Yoshiharu Uchimoto, Kazuhiko Shinohara, Tomoyasu Hirai, Noboru Ohta, Hideto Imai, Xiao Gao, Toshiki Watanabe, Kentaro Yamamoto, Tomoki Uchiyama
Publikováno v:
ACS Omega
ACS Omega, Vol 6, Iss 22, Pp 14130-14137 (2021)
ACS Omega, Vol 6, Iss 22, Pp 14130-14137 (2021)
The dispersion of perfluorinated sulfonic acid ionomers in catalyst inks is an important factor that controls the performance of catalyst layers in membrane electrode assemblies of polymer electrolyte fuel cells. Herein, the effects of water/alcohol
Autor:
Kentaro Yamamoto, Tomoyasu Hirai, Naoki Takao, Noboru Ohta, Yoshiharu Uchimoto, Tomoki Uchiyama, Kazuhiko Shinohara, Hideto Imai, Xiao Gao, Seiho Sugawara, Masashi Matsumoto
Publikováno v:
Langmuir : the ACS journal of surfaces and colloids. 36(14)
The morphological changes of Nafion thin films with thicknesses from 10 to 200 nm on Pt substrate with various annealing histories (unannealed to 240 °C) were systematically investigated using grazing incidence small-angle X-ray scattering (GISAXS)
Autor:
Yuki Kameya, Takashi Sasabe, Seiho Sugawara, Toshihiko Yoshida, Maria Ohki, Shuichiro Hirai, Norio Iriguchi, Suguru Uemura, Kouji Yokoyama, Hidekazu Sugimori
Publikováno v:
ECS Transactions. 80:819-827
The catalyst layer (CL) of polymer electrolyte fuel cell (PEFC) comprises catalyst particles, catalyst support (e.g., carbon particles), and proton-conductive ionomers. The CL plays a critical role in PEFC operation, and also the production process o
Autor:
Seiho Sugawara, Shota Katayama
Publikováno v:
Journal of Power Sources. 483:229178
Reduction in the gas transport resistance in the immediate vicinity of the interface between the catalyst metal and the ionomer thin film is one of the primary challenges in achieving high-performance polymer electrolyte fuel cells with a low use of
Autor:
Yoshiharu Uchimoto, Kentaro Yamamoto, Xiao Gao, Seiho Sugawara, Noboru Ohta, Naoki Takao, Toshiki Watanabe, Masakuni Takahashi, Hideto Imai, Tomoki Uchiyama, Tomoyasu Hirai, Kazuhiko Shinohara
Publikováno v:
Solid State Ionics. 357:115456
The electrochemical reactions occur on the carbon-supported platinum covered by a proton conducting polymer electrolyte. Thus, it is important to clarify the correlation between proton conductivity and morphology of the polymer electrolyte on Pt or c