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[NiFe]Hydrogenase from Citrobacter sp. S‐77 Surpasses Platinum as an Electrode for H 2 Oxidation Reaction
Author(s) -
Matsumoto Takahiro,
Eguchi Shigenobu,
Nakai Hidetaka,
Hibino Takashi,
Yoon KiSeok,
Ogo Seiji
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201404701
Subject(s) - electrode , platinum , anode , cathode , citrobacter , carbon monoxide , hydrogen , hydrogenase , standard hydrogen electrode , inorganic chemistry , chemistry , materials science , catalysis , working electrode , electrochemistry , organic chemistry , biochemistry , escherichia coli , enterobacteriaceae , gene
Reported herein is an electrode for dihydrogen (H 2 ) oxidation, and it is based on [NiFe]Hydrogenase from Citrobacter sp. S‐77 ([NiFe] S77 ). It has a 637 times higher mass activity than Pt (calculated based on 1 mg of [NiFe] S77 or Pt) at 50 mV in a hydrogen half‐cell. The [NiFe] S77 electrode is also stable in air and, unlike Pt, can be recovered 100 % after poisoning by carbon monoxide. Following characterization of the [NiFe] S77 electrode, a fuel cell comprising a [NiFe] S77 anode and Pt cathode was constructed and shown to have a a higher power density than that achievable by Pt.