Development of highly-active water splitting photocatalyst for solar hydrogen generation

• Project/Area Number: 16K17944
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Energy-related chemistry
• Research Institution: Tokyo Metropolitan University (2017); The University of Tokyo (2016)
• Principal Investigator: GOTO Yosuke 首都大学東京, 理工学研究科, 特任研究員 (60760783)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 水分解光触媒 / ソーラー水素製造 / 新規物質 / 無機化学 / 光触媒 / 水素製造

Outline of Final Research Achievements

We have investigated the detailed synthesis condition of novel oxysulfide La2Ta2ZrS2O8 for highly-active water splitting photocatalyst. We show La2Ta2ZrS2O8 phase was obtained by sulfurization of amorphous oxide precursor at relatively low temperature, 850 degC. This shows comparable water splitting activity to that obtained using conventional solid state reactions.
In addition, we also developed highly-active Al-doped SrTiO3 photocatalyst. SrCl2 flux-treated SrTiO3 with Al2O3 additive shows the quantum efficiency of 56% at 365 nm. Solar-to-hydrogen conversion efficiency of this photocatalyst reaches 0.6% under simulated sunlight.
A particulate ZnSe-CIGS photocathode was also investigated. This photocathode modified with CdS and ZnS was capable of utilizing photons up to 900 nm, while the onset potential was evaluated to be as high as 0.8 V vs. RHE.

Research Products

• [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] E_ect of Te substitution on crystal structure and transport properties of AgBiSe2 thermoelectric material (2018)
  • Author(s): Y. Goto, A. Nishida, H. Nishiate, M. Murata, C. H. Lee, A. Miura, C. Moriyoshi, Y. Kuroiwa, and Y. Mizuguchi
  • Journal Title: Dalton Trans. Volume: 47 Issue: 8 Pages: 2575-2580
  • DOI: 10.1039/c7dt04821a
  • Peer Reviewed
• [Journal Article] Selenium isotope effect in layered bismuth chalcogenide superconductor LaO0.6F0.4Bi(S,Se)2 (2018)
  • Author(s): K. Hoshi, Y. Goto, Y. Mizuguchi
  • Journal Title: Phys. Rev. B Volume: 97 Issue: 9 Pages: 094509-094513
  • DOI: 10.1103/physrevb.97.094509
  • Peer Reviewed
• [Journal Article] Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2- Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd) (2018)
  • Author(s): Y. Mizuguchi, K. Hoshi, Y. Goto, A. Miura, K. Tadanaga, C. Moriyoshi, Y. Kuroiwa
  • Journal Title: J. Phys. Soc. Jpn. Volume: 87 Issue: 2 Pages: 023704-023707
  • DOI: 10.7566/jpsj.87.023704
  • NAID: 210000134687
  • Peer Reviewed
• [Journal Article] A particulate (ZnSe)0.85(CuIn0.7Ga0.3Se2)0.15 photocathode modified with CdS and ZnS for sunlight-driven overall water splitting (2017)
  • Author(s): Y. Goto, T. Minegishi, Y. Kageshima, T. Higashi, H. Kaneko, Y. Kuang, M. Nakabayashi, N. Shibata, H. Ishihara, T. Hayashi, A. Kudo, T. Yamada, K. Domen
  • Journal Title: J. Mater. Chem. A Volume: 5 Issue: 40 Pages: 21242-21248
  • DOI: 10.1039/c7ta06663e
  • Peer Reviewed
• [Journal Article] SnAs-Based Layered Superconductor NaSn2As2 (2017)
  • Author(s): Goto Yosuke、Yamada Akira、Matsuda Tatsuma D.、Aoki Yuji、Mizuguchi Yoshikazu
  • Journal Title: Journal of the Physical Society of Japan Volume: 86 Issue: 12 Pages: 123701-123701
  • DOI: 10.7566/jpsj.86.123701
  • NAID: 210000134601
  • Peer Reviewed / Open Access
• [Journal Article] Bulk Superconductivity Induced by Se Substitution in BiCh2- Based Layered Compounds Eu0.5Ce0.5FBiS2－xSex (2017)
  • Author(s): Y. Goto, R. Sogabe, Y. Mizuguchi
  • Journal Title: J. Phys. Soc. Jpn. Volume: 86 Issue: 10 Pages: 104712-104716
  • DOI: 10.7566/jpsj.86.104712
  • NAID: 210000134560
  • Peer Reviewed
• [Journal Article] Synthesis and photocatalytic activity of La5Ti2Cu(S1-xSex)5O7 solid solutions for H2 production under visible light irradiation (2017)
  • Author(s): Swarnava Nandy, Yosuke Goto, Takashi Hisatomi, Yosuke Moriya, Tsutomu Minegishi, Masao Katayama, Kazunari Domen
  • Journal Title: ChemPhotoChem Volume: 印刷中 Issue: 6 Pages: 265-272
  • DOI: 10.1002/cptc.201700005
  • Peer Reviewed / Acknowledgement Compliant
• [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、Wang Qian、久富隆史、石切山巧樹、酒多喜久、片山正士、高田剛、嶺岸耕、山田太郎、堂免一成
  • Organizer: 第97回日本化学会春季年会
  • Place of Presentation: 慶応義塾大学（横浜）
  • Year and Date: 2017-03-16
• [Presentation] Effect of elemental substitution on thermoelectric properties of BiS2-based layered compounds (2017)
  • Author(s): Y. Goto, A. Nishida, C. H. Lee, Y. Mizuguchi
  • Organizer: European Materials Research Society 2017 Fall Meeting, Warsaw (2017).
  • Int'l Joint Research
• [Presentation] Enhanced thermoelectric performance in BiS2-based layered compound LaOBiS2-xSex (2017)
  • Author(s): Y. Goto, A. Nishida, O. Miura, C. H. Lee, Y. Mizuguchi
  • Organizer: Superstripes 2017, Ischia (2017).
  • Int'l Joint Research
• [Presentation] 層状ビスマスカルコゲナイド熱電材料開発の進捗 (2017)
  • Author(s): 後藤陽介
  • Organizer: 日本熱電学会第22回研究会、東京 (2017)
• [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、Wang Qian、久富隆史、石切山巧樹、酒田喜久、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春季年会、横浜 (2017).
• [Presentation] 粒子転写法により作製したZnSe-Cu(In,Ga)Se2固溶体光カソードの光電気化学的特性 (2016)
  • Author(s): 後藤陽介、兼古寛之、久富隆史、片山正士、嶺岸耕、山田太郎、堂免一成
  • Organizer: 第118回触媒討論会
  • Place of Presentation: 岩手大学（盛岡）
  • Year and Date: 2016-09-21
• [Patent(Industrial Property Rights)] 超電導体 (2018)
  • Inventor(s): 水口佳一、後藤陽介
  • Industrial Property Rights Holder: 水口佳一、後藤陽介
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2018-031880
  • Filing Date: 2018