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Akademický článek

Effects of Ag Nanoparticle Coated Metal Electrodes on Electrochemical CO2 Reduction in Aqueous KHCO3

Autor: Kayo KOIKE, Miyuki NARA, Minori FUKUSHIMA, Hyojung BAE, Jun-Seok HA, Katsushi FUJII, Satoshi WADA

Publikováno v: Electrochemistry, Vol 90, Iss 3, Pp 037009-037009 (2022)

Electrochemical CO2 reduction is crucial for developing a sustainable closed-carbon-cycle society; however, the factors determining product selectivity have not been fully established, especially when the reaction is carried out over metal cathodes.

Externí odkaz: https://doaj.org/article/f7edf290a0f64f6a9f3e9242ce97d95b

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Carrier Pathway for Photoelectrochemical Water Oxidation with Intermediate State in n-type GaN Compared with Route of Anodic Corrosion

Autor: Shinichiro Nakamura, Takenari Goto, Katsushi Fujii, Masakazu Sugiyama, Kayo Koike, Satoshi Wada

Publikováno v: The Journal of Physical Chemistry C. 125:8562-8569

Photoelectrochemical water splitting is a solar-to-chemical energy conversion technique. However, when n-type nonoxide semiconductors are used as photoanodes, they corrode, which is a competitive r...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc7f0dcd6ce3c0e8048a0a9206caf7f0
https://doi.org/10.1021/acs.jpcc.0c11366

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Distributed control of a user-on-demand renewable-energy power-source system using battery and hydrogen hybrid energy-storage devices

Autor: Satoshi Wada, Kayo Koike, Tsuno Katsuhiko, Yamashita Daiji, Masakazu Sugiyama, Katsushi Fujii

Publikováno v: International Journal of Hydrogen Energy. 44:27542-27552

A user-on-demand power source based on renewable energy requires storage devices to balance power sources and power demands because of the fluctuation of power sources like solar cells or wind power generators. The role of the control system is defin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d76388de1127ecffa2387837b8fef86f
https://doi.org/10.1016/j.ijhydene.2019.08.234

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First principles calculations of surface dependent electronic structures: a study on β-FeOOH and γ-FeOOH

Autor: Takeshi Morikawa, Tomiko M. Suzuki, Kaoru Ohno, Shinichiro Nakamura, Katsushi Fujii, Kayo Koike, Yuki Sakamoto, Yusuke Noda

Publikováno v: Physical Chemistry Chemical Physics. 21:18486-18494

We report a theoretical study on iron oxyhydroxide (FeOOH). The FeOOH surface is expected to act as an efficient electrochemical catalyst for the oxygen evolution reaction (OER), because it is based on iron, an element of the fourth highest Clarke nu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bbe251a6bf066f3e3017f3cb1f4bcc3
https://doi.org/10.1039/c9cp00157c

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Investigation of carrier transfer mechanism of NiO-loaded n-type GaN photoanodic reaction for water oxidation by comparison between band model and optical measurements

Autor: Katsushi Fujii, Kayo Koike, Takenari Goto, Shinichiro Nakamura, Satoshi Wada

Publikováno v: MRS Communications. 8:480-486

The electrochemical catalytic effects of the NiO islands and layer on n-type GaN were investigated. The NiO islands covered some parts of the GaN surface and were seen to improve photoanodic current and prevent photoanodic corrosion. However, the NiO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c78c86edd53466315c4af38f5e5d33f
https://doi.org/10.1557/mrc.2018.51

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Effects of NiO-loading on n-type GaN photoanode for photoelectrochemical water splitting using different aqueous electrolytes

Autor: Masakazu Sugiyama, Kayo Koike, Satoshi Ohara, Yoshiaki Nakano, Kazuhiro Yamamoto, Katsushi Fujii, Tomoka Kikitsu, Shinichiro Nakamura, Kazunari Ozasa

Publikováno v: International Journal of Hydrogen Energy. 42:9493-9499

n-type GaN photoanodes used for water splitting have stability problems. One means of resolving this is loading NiO catalyst on the n-type GaN surface. Aqueous electrolytes H2SO4, HCl, KOH, and NaOH are usually used for photoelectrochemical water spl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5605a326082d36175f9d5fd293808ac
https://doi.org/10.1016/j.ijhydene.2016.12.141

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Bio-mimic energy storage system with solar light conversion to hydrogen by combination of photovoltaic devices and electrochemical cells inspired by the antenna-associated photosystem II

Autor: Satoshi Wada, Kayo Koike, Katsushi Fujii, Tomonori Kawano

Publikováno v: Plant Signal Behav

Global warming caused by anthropogenic activity is one of the serious problems today. In order to suppress the global warming, the shift from fossil fuel–based energy source to the nature-oriented sustainable energy is encouraged. In this concept p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca7632023a01bcf6f067b89d744ef0d0
https://doi.org/10.1080/15592324.2020.1723946

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