Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Tomoyuki Ichikawa"'
Autor:
Masaya Morishita, Tomoyuki Ichikawa, Masaaki A. Tanaka, Motoharu Furuta, Daisuke Mashimo, Syuta Honda, Jun Okabayashi, Ko Mibu
Publikováno v:
Physical Review Materials. 7
We fabricated two types of cobalt-ferrite (001) thin films, insulative Fe-rich cobalt-ferrite CoxFe3-xO4+{\delta} (I-CFO) and conductive Fe-rich cobalt-ferrite CoyFe3-yO4 (C-CFO), with perpendicular magnetic anisotropy (PMA) on MgO (001) substrates.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b435da07b8cea5ae11542b22733596ea
https://doi.org/10.1103/physrevmaterials.7.054402
https://doi.org/10.1103/physrevmaterials.7.054402
Autor:
Fangqin Guo, Yufeng Wang, Shuji Takamine, Ko Kishimoto, Tomoyuki Ichikawa, Hiroki Miyaoka, Yoshihiro Shimizu, Tessui Nakagawa, Takayuki Ichikawa
Publikováno v:
International Journal of Hydrogen Energy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3aa0cae69031ed601b0595bbc924d208
https://doi.org/10.1016/j.ijhydene.2023.03.411
https://doi.org/10.1016/j.ijhydene.2023.03.411
Autor:
Tomoyuki Ichikawa, Hikaru Oyama, Keita Yamamoto, Machi Kanna, Takayuki Ichikawa, Hiroki Miyaoka, Yoshitsugu Kojima
Publikováno v:
Chemical Communications. 57:6003-6006
NaBH4 does not absorb NH3 below 100 kPa but transforms into a liquid state after NH3 absorption. On the other hand, LiBH4 absorbs NH3 at pressures lower than 100 kPa. Interestingly, mixed borohydrides absorbed NH3 at low pressures and were liquefied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::138d12009fa5a6dda27ad0eeb4214e22
https://doi.org/10.1039/d1cc00761k
https://doi.org/10.1039/d1cc00761k
Autor:
Masakuni Yamaguchi, Yoshitsugu Kojima, Hikaru Miyaoka, Hiroki Miyaoka, Tengfei Zhang, Tomoyuki Ichikawa
Publikováno v:
International Journal of Hydrogen Energy. 45:22189-22194
Ammonia absorption behavior of insoluble proton-based solid acids such as proton-exchanged montmorillonite, proton-exchanged zeolites α-zirconium phosphate and acid impregnated activated carbon in the water solution, was studied by ammonia and pH me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6e83134cc261c7fd32fdcb6b5f7d77c
https://doi.org/10.1016/j.ijhydene.2020.05.255
https://doi.org/10.1016/j.ijhydene.2020.05.255
Autor:
Tomoyuki Ichikawa, Kyohei Yamamoto, Takayuki Ichikawa, Hiroki Miyaoka, Keita Shinzato, Yuki Nakagawa, Yongming Wang, Shigehito Isobe, Toshiro Yamaguchi
Publikováno v:
International Journal of Hydrogen Energy. 45:6806-6812
In this work, nitrogenation, ammonia generation, regeneration reactions of lithium-tin alloy is investigated as pseudo catalytic process of ammonia synthesis. Li17Sn4 synthesized by thermochemical method at 500 °C can react with 0.1 MPa of N2 below
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c69f2879849843ff6289ce0bc29ebf0
https://doi.org/10.1016/j.ijhydene.2019.12.190
https://doi.org/10.1016/j.ijhydene.2019.12.190
Autor:
Masaaki Tanaka, Motoharu Furuta, Tomoyuki Ichikawa, Masaya Morishita, Yu-Min Hung, Syuta Honda, Teruo Ono, Ko Mibu
Publikováno v:
Applied Physics Letters. 122:042401
We demonstrated the generation of perpendicularly spin-polarized electronic currents using a tunnel spin-filtering effect through insulative Fe-rich cobalt ferrite Co xFe3− xO4+δ (I-CFO) barriers with perpendicular magnetic anisotropy (PMA). The I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c973362c48a1441bfad4a2f70cc6a478
https://doi.org/10.1063/5.0131390
https://doi.org/10.1063/5.0131390
Autor:
Fangqin Guo, Hikaru Oyama, Hiroyuki Gi, Kyohei Yamamoto, Shigehito Isobe, Tomoyuki Ichikawa, Hiroki Miyaoka, Takayuki Ichikawa
Publikováno v:
Journal of Alloys and Compounds. 918:165732
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df3b4cf5160a8505d0c3678b146532c9
https://doi.org/10.1016/j.jallcom.2022.165732
https://doi.org/10.1016/j.jallcom.2022.165732
Publikováno v:
International Journal of Hydrogen Energy. 43:14486-14492
Liquid ammonia is an attractive hydrogen carrier because of high storage capacity. According to ISO14687-2, an acceptable ammonia concentration in hydrogen for polymer electrolyte membrane (PEM) fuel cell vehicles is 0.1 ppm. When ammonia is used as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ed7e8b692a875446c5e6d6eed89fc7f
https://doi.org/10.1016/j.ijhydene.2018.06.065
https://doi.org/10.1016/j.ijhydene.2018.06.065
Publikováno v:
International Journal of Hydrogen Energy. 42:5220-5226
The effect of vanadium doping on the kinetics and thermodynamics of hydrogenation–dehydrogenation process of Mg 2 Ni have been investigated. Two samples, Mg 2 Ni-5 wt.% V and Mg 2 Ni-10 wt.% vanadium were prepared by ball milling process. The hydro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f40c99701966ce43e4599d34f306970
https://doi.org/10.1016/j.ijhydene.2016.10.128
https://doi.org/10.1016/j.ijhydene.2016.10.128
Autor:
Takayuki Ichikawa, Yoshitsugu Kojima, Hikaru Yamamoto, Hiroki Miyaoka, Kiyotaka Goshome, Tomoyuki Ichikawa
Publikováno v:
MATERIALS TRANSACTIONS. 56:410-414
Lithium nitride Li3N is hydrogenated below 300°C under 0.5MPa of H2, and then LiNH2 and LiH are formed as products. Furthermore, the reaction between LiNH2 and H2 proceeds below 250°C under 0.5MPa of H2 flow condition, which forms NH3 and LiH. In t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c10451175a639991eb90d98c41c3c17
https://doi.org/10.2320/matertrans.m2014382
https://doi.org/10.2320/matertrans.m2014382