Development of water splitting photocatalysts for efficient sunlight utilization

• Project/Area Number: 16K06862
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Catalyst/Resource chemical process
• Research Institution: Shinshu University (2018); The University of Tokyo (2016-2017)
• Principal Investigator: Takata Tsuyoshi 信州大学, 先鋭領域融合研究群環境・エネルギー材料科学研究所, 特任教授 (80334499)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 光触媒 / 水分解 / 太陽光 / 水素製造 / 助触媒 / 半導体 / 太陽光エネルギー / 光電着法 / 耐久性 / 反応容器設計 / 酸窒化物 / 触媒調製 / 太陽光利用 / 反応器設計 / 複合体 / 触媒・化学プロセス / 水素 / エネルギー変換

Outline of Final Research Achievements

In this research project, photocatalytic water splitting system to efficiently utilize solar energy has been studied. The first approach is to enhance quantum efficiency of water splitting photocatalysts developed previously to un upper limit level. In fact, one of the wide-gap oxide photocatalyst has been upgraded to enable near 100% quantum efficiency in water splitting. Another target was to perform overall water splitting on some photocatalysts with narrow bandgap while this target was not sufficiently achieved. A photocatalytic reactor to produce solar hydrogen was newly designed. Quite novel, simple and compact structure was created, which is easily extensible to practical application.

Academic Significance and Societal Importance of the Research Achievements

光触媒自身の開発においては、バンドギャップが大きく紫外光しか利用できないが、その範囲では上限レベルまで反応効率を上げることができた。水分解反応はその素過程の中で酸素生成が4電子反応あるために困難と考えられている。そのような反応において量子収率をほぼ100％に向上させ、そのために必要な触媒の構造と機能を明らかにしたことは当該研究者間でも関心の高い結果となる。

Research Products

• [Journal Article] An Al-doped SrTiO3 photocatalyst maintaining sunlight-driven overall water splitting activity for over 1000h of constant illumination (2019)
  • Author(s): Lyu Hao、Hisatomi Takashi、Goto Yosuke、Yoshida Masaaki、Higashi Tomohiro、Katayama Masao、Takata Tsuyoshi、Minegishi Tsutomu、Nishiyama Hiroshi、Yamada Taro、Sakata Yoshihisa、Asakura Kiyotaka、Domen Kazunari
  • Journal Title: Chemical Science Volume: 10 Issue: 11 Pages: 3196-3201
  • DOI: 10.1039/c8sc05757e
  • NAID: 120007113441
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Metal selenide photocatalysts for visible-light-driven Z-scheme pure water splitting (2019)
  • Author(s): Chen Shanshan、Ma Guijun、Wang Qian、Sun Song、Hisatomi Takashi、Higashi Tomohiro、Wang Zheng、Nakabayashi Mamiko、Shibata Naoya、Pan Zhenhua、Hayashi Toshio、Minegishi Tsutomu、Takata Tsuyoshi、Domen Kazunari
  • Journal Title: Journal of Materials Chemistry A Volume: 7 Issue: 13 Pages: 7415-7422
  • DOI: 10.1039/c9ta00768g
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Particulate Photocatalysts for Water Splitting: Recent Advances and Future Prospects (2019)
  • Author(s): T. Takata, K. Domen
  • Journal Title: ACS Energy Letters Volume: 4 Issue: 2 Pages: 542-549
  • DOI: 10.1021/acsenergylett.8b02209
  • Peer Reviewed
• [Journal Article] Overall water splitting by Ta3N5 nanorod single crystals grown on the edges of KTaO3 particles (2018)
  • Author(s): Wang Zheng、Inoue Yasunobu、Hisatomi Takashi、Ishikawa Ryo、Wang Qian、Takata Tsuyoshi、Chen Shanshan、Shibata Naoya、Ikuhara Yuichi、Domen Kazunari
  • Journal Title: Nature Catalysis Volume: 1 Issue: 10 Pages: 756-763
  • DOI: 10.1038/s41929-018-0134-1
  • Peer Reviewed
• [Journal Article] A Particulate Photocatalyst Water-Splitting Panel for Large-Scale Solar Hydrogen Generation (2018)
  • Author(s): Y. Goto, T. Hisatomi, Q. Wang, T. Higashi, K. Ishikiriyama, T. Maeda, Y. Sakata, S. Okunaka, H. Tokudome, M. Katayama, S. Akiyama, H. Nishiyama, Y. Inoue, T. Takewaki, T. Setoyama, T. Minegishi, T. Takata, T. Yamada, K. Domen
  • Journal Title: Joule Volume: 2 Issue: 3 Pages: 509-520
  • DOI: 10.1016/j.joule.2017.12.009
  • Peer Reviewed / Open Access
• [Journal Article] Efficient Photocatalytic Water Splitting Using Al-Doped SrTiO3 Coloaded with Molybdenum Oxide and Rhodium-Chromium Oxide (2018)
  • Author(s): T. H. Chiang, H. Lyu, T. Hisatomi, Y. Goto, T. Takata, M. Katayama, T. Minegishi, K. Domen
  • Journal Title: ACS Catalysis Volume: 8 Issue: 4 Pages: 2782-2788
  • DOI: 10.1021/acscatal.7b04264
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Overall water splitting by photoelectrochemical cells consisting of (ZnSe)0.85(CuIn0.7Ga0.3Se2)0.15 photocathodes and BiVO4 photoanodes (2017)
  • Author(s): T. Higashi, H. Kaneko, T. Minegishi, H. Kobayashi, M. Zhong, Y. Kuang, T. Hisatomi, M. Katayama, T. Takata, H. Nishiyama, T. Yamada, K. Domen
  • Journal Title: Chem. Communication Volume: 53 Issue: 85 Pages: 11674-11677
  • DOI: 10.1039/c7cc06637f
  • Peer Reviewed
• [Journal Article] Particulate photocatalysts for overall water splitting (2017)
  • Author(s): S. Chen, T. Takata, K. Domen
  • Journal Title: Nature Reviews Materials Volume: 2 Issue: 10 Pages: 1705-1705
  • DOI: 10.1038/natrevmats.2017.50
  • Peer Reviewed
• [Journal Article] Development of non-oxide semiconductors as light harvesting materials in photocatalytic and photoelectrochemical water splitting (2017)
  • Author(s): T. Takata, K. Domen
  • Journal Title: Dalton Transactions Volume: 46 Issue: 32 Pages: 10529-10544
  • DOI: 10.1039/c7dt00867h
  • Peer Reviewed
• [Journal Article] Particulate photocatalyst sheets based on carbon conductor layer for efficient Z-scheme pure-water splitting at ambient pressure (2017)
  • Author(s): Q. Wang, T. Hisatomi, Y. Suzuki, Z. Pan, J. Seo, M. Katayama, T. Minegishi, H. Nishiyama, T. Takata, K. Seki, A. Kudo, T. Yamada, K. Domen
  • Journal Title: J. Am. Chem. Soc. Volume: 139 Issue: 4 Pages: 1675-1683
  • DOI: 10.1021/jacs.6b12164
  • Peer Reviewed
• [Journal Article] Photocatalyst Sheets Composed of Particulate LaMg1/3Ta2/3O2N and Mo-Doped BiVO4 for Z-Scheme Water Splitting under Visible Light (2016)
  • Author(s): Z. Pan, T. Hisatomi, Q. Wang, S. Chen, M. Nakabayashi, N. Shibata, C. Pan, T. Takata, M. Katayama, T. Minegishi, A. Kudo, and K. Domen
  • Journal Title: ACS Catal. Volume: 6 Issue: 10 Pages: 7188-7196
  • DOI: 10.1021/acscatal.6b01561
  • Peer Reviewed
• [Journal Article] Photoreduced Graphene Oxide as a Conductive Binder to Improve the Water Splitting Activity of Photocatalyst Sheets (2016)
  • Author(s): Pan Zhenhua, Hisatomi Takashi, Wang Qian, Chen Shanshan, Iwase Akihide, Nakabayashi Mamiko, Shibata Naoya, Takata Tsuyoshi, Katayama Masao, Minegishi Tsutomu, Kudo Akihiko, Domen Kazunari
  • Journal Title: Advanced Functional Materials Volume: 26 Pages: 7011-7019
  • Peer Reviewed
• [Presentation] 限界量子収率での水分解実証例 (2019)
  • Author(s): 高田剛、姜君哲、酒多喜久、堂免一成
  • Organizer: 日本化学会 第99春季年会
• [Presentation] 大面積展開を指向したソーラー水分解光触媒システムの開発 (2018)
  • Author(s): 高田剛、堂免一成
  • Organizer: 第48回石油・石油化学討論会
• [Presentation] ソーラー水分解光触媒パネルのコンパクトデザイン (2018)
  • Author(s): 高田剛、久富隆史、片山正士、西山洋、秋山誠治、堂免一成
  • Organizer: 第122回触媒討論会
• [Presentation] 大規模展開を指向したソーラー水分解光触媒パネルの作製 (2017)
  • Author(s): 高田 剛・後藤 陽介・久富隆史・片山正士・西山洋・秋山誠治・井上泰宣・堂免一成
  • Organizer: 第120回触媒討論会
• [Presentation] Photocatalytic Water Splitting on (Oxy)nitride Semiconductors (2017)
  • Author(s): Tsuyoshi Takata, Kazunari Domen
  • Organizer: 12th International Congress on Nitride Semiconductors
  • Int'l Joint Research / Invited
• [Presentation] フラックス法によるAlドープSrTiO3水分解光触媒の高活性化 (2017)
  • Author(s): 後藤陽介、ワンチェン、久富隆史、石桐山巧樹、酒多喜久、片山正士、高田剛、嶺岸耕、山田太郎、堂免一成
  • Organizer: 日本化学会第97春季年回
  • Place of Presentation: 慶應義塾大学日吉キャンパス
• [Presentation] LaMg1/3Nb2/3O2Nの合成と水分解活性の検討 (2017)
  • Author(s): 石塚大策、久富隆史、高田剛、片山正士、嶺岸耕、堂免一成
  • Organizer: 日本化学会第97春季年回
  • Place of Presentation: 慶應義塾大学日吉キャンパス
• [Presentation] Ta系ペロブスカイト型酸窒化物光触媒の水分解活性に対する表面修飾の効果 (2017)
  • Author(s): 岡本寛也、小寺正徳、久富隆史、高田剛、片山正士、嶺岸耕、堂免一成
  • Organizer: 日本化学会第97春季年回
  • Place of Presentation: 慶應義塾大学日吉キャンパス