Zobrazeno 1 - 10
of 173
pro vyhledávání: '"Shigeki Kuroki"'
Publikováno v:
Tetrahedron Letters. 56:7038-7042
13 C-labeled nitrile N -oxides ( 13 CNOs) were prepared to investigate the structural characteristics of nitrile N -oxide in solution. In the 13 C NMR spectra at room temperature, 13 C signals of 13 CNOs appeared at 35–38 ppm. The chemical shift of
Publikováno v:
Journal of Power Sources. 290:8-13
The oxygen reduction reaction (ORR) activity of pyrolyzed metal-free and metal (Mn, Fe, Co, Ni and Cu)-containing polyaniline (PANI) in polymer electrolyte fuel cell (PEFC) was studied. The metal-free PANI800 shows quite poor ORR catalytic activity,
Publikováno v:
Macromolecules. 48:5300-5309
Solid-state (ss) NMR spectroscopy was applied to study the stabilization process of 30 wt % 13C-labeled atactic-polyacrylonitrile (a-PAN) heat-treated at various temperatures (Ts) under nitrogen and air. Direct polarization magic-angle spinning (DP/M
Publikováno v:
Dalton Transactions. 44:19464-19468
The synthesis of highly reactive perfluoroalkyl Grignard reagents with early transition metal zirconocene complexes and their new types of highly chemo-, regio-, and stereo-selective perfluoroalkylation reactions are reported with epoxides in particu
Publikováno v:
Colloid and Polymer Science. 293:1023-1033
The coil-globule transition of alkali metal (M+) and tetraalkyl ammonium (TAA+) polysulfonates, i.e., poly(styrene sulfonate)s (PSSM, PSSTAA) and poly(vinyl sulfonate)s (PVSM, PVSTAA), in aqueous organic solvents were investigated in terms of the red
Publikováno v:
Carbon. 55:160-167
15 N-labeled polyaniline (PANI) is heat treated at temperatures from 200 to 1000 °C in a nitrogen atmosphere. The carbonization of PANI is determined using solid state (SS) 13 C and 15 N NMR. In an attempt to accurately assign the experimentally obs
Autor:
Shigeki Kuroki, Makoto Saito, Shogo Moriya, Hideharu Niwa, Jun-ichi Ozaki, Kiyoyuki Terakura, Yoshihisa Harada, Seizo Miyata, Masaharu Oshima, Yuta Nabae, Masaki Kobayashi, Katsuyuki Matsubayashi, Takashi Ikeda
Publikováno v:
Journal of Power Sources. 223:30-35
Recently carbon-based catalysts have attracted much attention for its high ability to catalyze oxygen reduction reaction (ORR) in a cathode for polymer electrolyte fuel cells. Among active site models of the catalyst, edge region of sp2 carbon networ
Autor:
Dai Mochizuki, Takashi Okajima, Masayuki Nogami, Shigeki Kuroki, Shinji Baba, Kaede Iizuka, Masanobu Nakayama, Takanori Kiguchi, Yoshihiro Yamamoto
Publikováno v:
Journal of the Ceramic Society of Japan. 121:723-729
Department of Organic and Polymeric Materials, Tokyo Institute of Technology,2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, JapanDevelopment of all solid-state Li secondary based on the use of dry polymer or inorganic electrolytes is vital as they
Publikováno v:
Colloid and Polymer Science. 291:1453-1462
The effects of polymer charge density on the counterion-specific and solvent-specific coil–globule transition of polycarboxylates were investigated for alkali metal salts of poly(styrene-alt-maleic acid) (PSaltMA) and poly(acrylic acid) (PAA) in aq
Autor:
Yoshihisa Harada, Hisao Kiuchi, Seizo Miyata, Yuta Nabae, Shigeki Kuroki, Takashi Ikeda, Hideharu Niwa, Masaki Kobayashi, Kiyoyuki Terakura, Masaharu Oshima, Masa-aki Kakimoto, Masayuki Chokai
Publikováno v:
Electrochimica Acta. 82(No. 0):291-295
We study the characteristics of oxygen adsorption on metal-free carbon-based cathode catalysts derived from nitrogen-containing polyamide (PA) and nitrogen-free phenolic resin (PhRs). Electrochemical analysis and Raman spectroscopy showed higher 2-el