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- Title
[NiFe]Hydrogenase from Citrobacter sp. S-77 Surpasses Platinum as an Electrode for H<sub>2</sub> Oxidation Reaction.
- Authors
Matsumoto, Takahiro; Eguchi, Shigenobu; Nakai, Hidetaka; Hibino, Takashi; Yoon, Ki ‐ Seok; Ogo, Seiji
- Abstract
Reported herein is an electrode for dihydrogen (H2) 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.
- Subjects
HYDROGENASE; CITROBACTER; PLATINUM; ELECTRODES; OXIDATION; STANDARD hydrogen electrode
- Publication
Angewandte Chemie, 2014, Vol 126, Issue 34, p9041
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201404701