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  1. 140 環境・エネルギー材料科学研究所
  2. 1401 学術論文

La5Ti2Cu1-xAgxS5O7 photocathodes operating at positive potentials during photoelectrochemical hydrogen evolution under irradiation of up to 710 nm

http://hdl.handle.net/10091/00022538
http://hdl.handle.net/10091/00022538
7069f1a9-e7ad-4e4a-9184-1c1413979ea4
名前 / ファイル ライセンス アクション
15H05494_07.pdf 15H05494_07.pdf (2.0 MB)
This journal is ©The Royal Society of Chemistry 2015. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Item type 学術雑誌論文 / Journal Article(1)
公開日 2021-02-16
タイトル
言語 en
タイトル La5Ti2Cu1-xAgxS5O7 photocathodes operating at positive potentials during photoelectrochemical hydrogen evolution under irradiation of up to 710 nm
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Hisatomi, Takashi

× Hisatomi, Takashi

WEKO 110369

en Hisatomi, Takashi

Search repository
Okamura, Shintaro

× Okamura, Shintaro

WEKO 110370

en Okamura, Shintaro

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Liu, Jingyuan

× Liu, Jingyuan

WEKO 110371

en Liu, Jingyuan

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Shinohara, Yuki

× Shinohara, Yuki

WEKO 110372

en Shinohara, Yuki

Search repository
Ueda, Koichiro

× Ueda, Koichiro

WEKO 110373

en Ueda, Koichiro

Search repository
Higashi, Tomohiro

× Higashi, Tomohiro

WEKO 110374

en Higashi, Tomohiro

Search repository
Katayama, Masao

× Katayama, Masao

WEKO 110375

en Katayama, Masao

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Minegishi, Tsutomu

× Minegishi, Tsutomu

WEKO 110376

en Minegishi, Tsutomu

Search repository
Domen, Kazunari

× Domen, Kazunari

WEKO 110377

en Domen, Kazunari

Search repository
信州大学研究者総覧へのリンク
氏名 Hisatomi, Takashi
URL https://soar-rd.shinshu-u.ac.jp/profile/ja.ghSpPhyV.html
信州大学研究者総覧へのリンク
氏名 Domen, Kazunari
URL https://soar-rd.shinshu-u.ac.jp/profile/ja.yafCOeLV.html
出版者
出版者 ROYAL SOC CHEMISTRY
引用
内容記述タイプ Other
内容記述 Energy & Environmental Science.8(11):3354-3362(2015)
書誌情報 Energy & Environmental Science

巻 8, 号 11, p. 3354-3362, 発行日 2015-09-22
抄録
内容記述タイプ Abstract
内容記述 A photoelectrochemical (PEC) cell based on a series-connected photocathode and photoanode made of particulate semiconductors is a potentially scalable and inexpensive device for renewable solar hydrogen production via PEC water splitting without any external power supply. The realisation of such PEC devices hinges on the development of photoelectrodes that operate at a small applied voltage. In this study, solid solutions of La5Ti2CuS5O7 (LTC) and La5Ti2AgS5O7 (LTA) were synthesised, and their physical, optical, and PEC properties in the water splitting reaction were discussed. LTC and LTA formed a La5Ti2Cu1-xAgxS5O7 solid solution (LTC(1-x)A(x)) over the whole compositional range. The indirect bandgap energy of LTC(1-x)A(x) changed nonlinearly with respect to composition, attaining its minimum value (ca. 1.8 eV) at a composition of x approximate to 0.16. Photoelectrodes of Al-doped LTC(1-x)A(x) solid solution powder fabricated using the particle transfer method exhibited a photocathodic response regardless of the Ag content. 1% Al-LTC(0.9)A(0.1) photocathodes exhibited the best PEC properties in the hydrogen evolution reaction and yielded a hypothetical half-cell solar-to-hydrogen energy conversion efficiency of 0.25% at +0.6 V vs. RHE, three times higher than the previously reported 1% Sc-LTC. In addition, 1% Al-LTC(0.9)A(0.1) photocathodes were fairly stable at + 0.7 V vs. RHE without any protective modifications. Owing to the positive operational electrode potential of 1% Al-LTC(0.9)A(0.1), unassisted PEC water splitting was accomplished using series-connected photoelectrodes made of 1% Al-LTC(0.9)A(0.1) and BaTaO2N, particulate semiconductors with absorption edge wavelengths of 710 and 660 nm, respectively, at a Faradaic efficiency of unity and a solar-to-hydrogen energy conversion efficiency of approximately 0.1%.
資源タイプ(コンテンツの種類)
内容記述タイプ Other
内容記述 Article
ISSN
収録物識別子タイプ PISSN
収録物識別子 1754-5692
DOI
識別子タイプ DOI
関連識別子 https://doi.org/10.1039/c5ee02431e
関連名称 10.1039/c5ee02431e
権利
権利情報 This journal is ©The Royal Society of Chemistry 2015. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
WoS
表示名 Web of Science
URL http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000364324500029
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