Y
Yoshihisa Harada
Researcher at University of Tokyo
Publications - 176
Citations - 5311
Yoshihisa Harada is an academic researcher from University of Tokyo. The author has contributed to research in topics: Absorption spectroscopy & Emission spectrum. The author has an hindex of 34, co-authored 163 publications receiving 4578 citations. Previous affiliations of Yoshihisa Harada include Tokyo Institute of Technology & National Institute for Materials Science.
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Journal ArticleDOI
The inhomogeneous structure of water at ambient conditions
Congcong Huang,Kjartan Thor Wikfeldt,Takashi Tokushima,Dennis Nordlund,Yoshihisa Harada,Uwe Bergmann,Marc Niebuhr,Thomas M. Weiss,Yuka Horikawa,Mikael Leetmaa,Mathias P. Ljungberg,Osamu Takahashi,Annika Lenz,Lars Ojamäe,Alexander P. Lyubartsev,Shik Shin,Lars G. M. Pettersson,Anders Nilsson +17 more
TL;DR: The present results provide experimental evidence that the extreme differences anticipated in the hydrogen-bonding environment in the deeply supercooled regime surprisingly remain in bulk water even at conditions ranging from ambient up to close to the boiling point.
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X-ray absorption analysis of nitrogen contribution to oxygen reduction reaction in carbon alloy cathode catalysts for polymer electrolyte fuel cells
Hideharu Niwa,Koji Horiba,Yoshihisa Harada,Masaharu Oshima,Takashi Ikeda,Kiyoyuki Terakura,Jun-ichi Ozaki,Seizo Miyata +7 more
TL;DR: In this article, the electronic structure of nitrogen introduced into various carbon-based cathode catalysts for the polymer electrolyte fuel cell (PEFC) was investigated using X-ray absorption spectroscopy (XAS).
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High resolution X-ray emission spectroscopy of liquid water : The observation of two structural motifs
Takashi Tokushima,Yoshihisa Harada,Osamu Takahashi,Yasunori Senba,Haruhiko Ohashi,Lars G. M. Pettersson,Anders Nilsson,Anders Nilsson,Shik Shin +8 more
TL;DR: The structure of liquid water is presently under intense debate as discussed by the authors, and the connection between X-ray spectroscopy and the structure of the hydrogen bonding network is discussed in detail.
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Atomic-scale characterization of nitrogen-doped graphite: Effects of dopant nitrogen on the local electronic structure of the surrounding carbon atoms
Takahiro Kondo,Simone Casolo,Tetsuya Suzuki,Taishi Shikano,Masataka Sakurai,Yoshihisa Harada,Makoto Saito,Masaharu Oshima,Mario Italo Trioni,Gian Franco Tantardini,Gian Franco Tantardini,Junji Nakamura +11 more
TL;DR: In this article, the local atomic and electronic structures of a nitrogen-doped graphite surface were reported by scanning tunneling microscopy, scan tunneling spectroscopy, x-ray photoelectron spectroscopic, and first-principles calculations.
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Intermediate honeycomb ordering to trigger oxygen redox chemistry in layered battery electrode
Benoit Mortemard de Boisse,Benoit Mortemard de Boisse,Guandong Liu,Jiangtao Ma,Shin-ichi Nishimura,Shin-ichi Nishimura,Sai Cheong Chung,Sai Cheong Chung,Hisao Kiuchi,Yoshihisa Harada,Jun Kikkawa,Yoshio Kobayashi,Masashi Okubo,Masashi Okubo,Atsuo Yamada,Atsuo Yamada +15 more
TL;DR: It is clarified that the large extra capacity of ordered Na2 RuO3 is enabled by a spontaneously ordered intermediate Na1RuO3 phase with ilmenite O1 structure, which induces frontier orbital reorganization to trigger the oxygen redox reaction, unveiling a general requisite for the stable oxygen redOx reaction in high-capacity Na2MO3 cathodes.