論文

2017年8月

Inorganic/whole-cell biohybrid photocatalyst for highly efficient hydrogen production from water

APPLIED CATALYSIS B-ENVIRONMENTAL
  • Yuki Honda
  • ,
  • Motonori Watanabe
  • ,
  • Hidehisa Hagiwara
  • ,
  • Shintaro Ida
  • ,
  • Tatsumi Ishihara

210
開始ページ
400
終了ページ
406
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.apcatb.2017.04.015
出版者・発行元
ELSEVIER SCIENCE BV

To obtain a clean hydrogen production system, we have developed an inorganic-bio hybrid photocatalyst system based on the combination of anatase TiO2, methylviologen (MV) as an electron mediator, and a whole-cell biocatalyst consisting of [FeFe]-hydrogenase and maturase gene-harboring recombinant Escherichia coli; however, the apparent quantum yield at 300 nm (AQY(300)) for hydrogen production was low (0.3%). The system consists of a two-step reaction: (1) photocatalytic MV reduction by Ti02, and (2) hydrogen production with reduced MV using a biocatalyst. The enhancement of step 1 under biocatalyst-friendly conditions was investigated in an attempt to further improve the reaction efficiency. Among the condition tested, the use of 100mM Tris-HCl (pH 7), 150mM NaCl, and 5% (v/v) glycerol with P-25 TiO2 especially enhanced the step 1 reaction by a 300-fold increase in the MV reduction rate compared with previously tested reaction condition (100 mM Tris-HCl( pH 7), 150 mM NaCl, 5% (v/v) glycerol, and 100 mM ascorbate with anatase Ti02). Under the enhanced step 1 reaction, AQY(300) and AQY350 for photocatalytic MV reduction reached 60.8% and 52.2%, respectively. The enhanced step 1 reaction thus significantly improved the overall photocatalytic hydrogen productivity of the hybrid system and AQY(300) and AQY(350) reached 26.4% and 31.2%, respectively. The inorganic-whole-cell biohybrid system can therefore provide noble metal-free, efficient, and clean hydrogen production. (C) 2017 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 15

リンク情報
DOI
https://doi.org/10.1016/j.apcatb.2017.04.015
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000400585500037&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85017448548&origin=inward

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