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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%."}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Hisatomi, Takashi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110369", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Okamura, Shintaro", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110370", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Liu, Jingyuan", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110371", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Shinohara, Yuki", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110372", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Ueda, Koichiro", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110373", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Higashi, Tomohiro", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110374", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Katayama, Masao", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110375", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Minegishi, Tsutomu", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110376", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Domen, Kazunari", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "110377", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2021-02-16"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "15H05494_07.pdf", "filesize": [{"value": "2.0 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensefree": "This journal is ©The Royal Society of Chemistry 2015. 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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/10091/000225387069f1a9-e7ad-4e4a-9184-1c1413979ea4
名前 / ファイル | ライセンス | アクション |
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This journal is ©The Royal Society of Chemistry 2015. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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× Okamura, Shintaro× Liu, Jingyuan× Shinohara, Yuki× Ueda, Koichiro× Higashi, Tomohiro× Katayama, Masao× Minegishi, Tsutomu× Domen, Kazunari |
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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 |
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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 |