Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Koichiro Asazawa"'
Autor:
Zhong Xie, Wei Qu, Elizabeth A. Fisher, Jason Fahlman, Koichiro Asazawa, Takao Hayashi, Hiroshi Shirataki, Hideaki Murase
Publikováno v:
Materials, Vol 17, Iss 3, p 556 (2024)
The determination of the electrochemically active surface area (ECSA) of a catalyst layer (CL) of a non-precious metal catalyst is of fundamental importance in optimizing the design of a durable CL for anion exchange membrane (AEM) water electrolysis
Externí odkaz:
https://doaj.org/article/9f5133e7c44244c1b2c9c7cf946605a9
Autor:
Hirofumi Kishi, Tomokazu Sakamoto, Koichiro Asazawa, Susumu Yamaguchi, Takeshi Kato, Barr Zulevi, Alexey Serov, Kateryna Artyushkova, Plamen Atanassov, Daiju Matsumura, Kazuhisa Tamura, Yasuo Nishihata, Hirohisa Tanaka
Publikováno v:
Nanomaterials, Vol 8, Iss 12, p 965 (2018)
Platinum group metal-free (PGM-free) catalysts based on transition metal-nitrogen-carbon nanomaterials have been studied by a combination of ex situ and in situ synchrotron X-ray spectroscopy techniques; high-resolution Transmission Electron Microsco
Externí odkaz:
https://doaj.org/article/95d4dc0427004861ab988f64acd03941
Autor:
Takano Aoi, Masato Takeuchi, Koichiro Asazawa, Kato Takeshi, Yoshikazu Iseki, Misaki Yanagi, Yingtong Bao
Publikováno v:
Chemistry Letters. 48:738-741
This study is the first approach to analyze hydrazine (N2H4) in aqueous solution as well as adsorbed on catalyst surfaces by NIR (near-infrared) spectroscopy. N2H4 molecule was observed at 4961 cm−...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85f1af26f0b18a408ae14dd1bf7f81e3
https://doi.org/10.1246/cl.190129
https://doi.org/10.1246/cl.190129
Autor:
Hiroshi Nakanishi, Hideaki Kasai, Koichiro Asazawa, Susumu Yamaguchi, Ryan Lacdao Arevalo, Susan Meñez Aspera
Publikováno v:
Catalysis Letters. 148:1073-1079
Carbohydrazide (CH6N4O) is a potential substitute to hydrazine in fuel cell applications. This paper presents a theoretical study on the adsorption of carbohydrazide on Au(111) and Au3Ni(111) surfaces using first principles calculations based on dens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::108901ba99721272d674b1ba5c1f9934
https://doi.org/10.1007/s10562-018-2327-2
https://doi.org/10.1007/s10562-018-2327-2
Autor:
Hirohisa Tanaka, Koichiro Asazawa, Daiju Matsumura, Susumu Yamaguchi, Shogo Kusano, Hirofumi Kishi, Jun'ichiro Mizuki, Tomokazu Sakamoto
Publikováno v:
Journal of Electronic Materials. 46:3634-3638
A method combining cyclic voltammetry (CV) with x-ray absorption fine structure (XAFS) spectroscopy, viz. CV-XAFS, has been developed to enable in situ real-time investigation of atomic and electronic structures related to electrochemical reactions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7221550529dcdaa1f0ba48169a95b02e
https://doi.org/10.1007/s11664-016-5259-x
https://doi.org/10.1007/s11664-016-5259-x
Autor:
Koichiro Asazawa, Hideaki Ono, Taro Kimura, Junji Inukai, Kenji Miyatake, Junpei Miyake, Takano Aoi
Publikováno v:
Journal of Materials Chemistry A. 5:24804-24812
A novel series of ammonium-containing copolymers (QPAF-4) were designed and synthesized as anion exchange membranes for alkaline fuel cell applications. The copolymers were prepared via a nickel promoted polycondensation reaction with high molecular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2383d0764357925063fb8282c15996e
https://doi.org/10.1039/c7ta09409d
https://doi.org/10.1039/c7ta09409d
Publikováno v:
Macromolecules. 49:4480-4489
A novel series of anion conductive aromatic copolymers were synthesized from preaminated monomers (2,5-, 3,5-, or 2,4-dichloro-N,N-dimethylbenzylamine), and their properties were investigated for alkaline fuel cell applications. The targeted copolyme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64b19fce33e809301dfb067deb0c5d05
https://doi.org/10.1021/acs.macromol.6b00408
https://doi.org/10.1021/acs.macromol.6b00408
Inorganic clusters with a [Fe2MoOS3] core—a functional model for acetylene reduction by nitrogenases
Autor:
Andrew Robertson, Hirohisa Tanaka, Takeshi Yatabe, Seiji Ogo, Hidetaka Nakai, Koji Yoshimoto, Takahiro Matsumoto, Viet Ha Tran, Koichiro Asazawa
Publikováno v:
Dalton Transactions. 45:14620-14627
We report the first example of a wholly inorganic mimic of a part of the FeMoco active centre of nitrogenases. We detail the synthesis, characterisation and reactivity of two related, transient hydride-containing inorganic clusters, a dihydride compl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::128bee8a56f1b3d8c63e7bc96dfeea00
https://doi.org/10.1039/c6dt01655c
https://doi.org/10.1039/c6dt01655c
Autor:
Ulises Martinez, Koichiro Asazawa, Yasuo Nishihata, Plamen Atanassov, Kazuhisa Tamura, Hirohisa Tanaka, Kateryna Artyushkova, Tomokazu Sakamoto, Daiju Matsumura, Alexey Serov
Publikováno v:
Electrochimica Acta. 163:116-122
Carbon supported Ni, Ni0.87Zn0.13, and Co hydrazine electrooxidation catalysts were synthesized by an impregnation/freeze-drying procedure followed by thermal annealing for use as anode catalyst of direct hydrazine hydrate fuel cells (DHFCs). The cel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::371f24eb864e5827573d4620db2aff8a
https://doi.org/10.1016/j.electacta.2015.02.156
https://doi.org/10.1016/j.electacta.2015.02.156
Autor:
Koichiro Asazawa, Eriko Nishino, Manai Shimada, Kenji Miyatake, Susumu Yamaguchi, Junko Yamada, Junpei Miyake
Publikováno v:
Chemistry Letters. 45:664-666
The properties of anion-exchange membranes composed of fluorinated block copoly(arylene ether)s, QPE-bl-3, were investigated. QPE-bl-3 membranes exhibited high chemical stability under accelerated ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0ddac4647f5c766e6cce3b7e6617e9b
https://doi.org/10.1246/cl.160161
https://doi.org/10.1246/cl.160161