[NiFe]Hydrogenase from Citrobacter sp. S‐77 Surpasses Platinum as an Electrode for H2 Oxidation Reaction |
| |
| Authors: | Dr. Takahiro Matsumoto Shigenobu Eguchi Dr. Hidetaka Nakai Prof. Takashi Hibino Dr. Ki‐Seok Yoon Prof. Seiji Ogo |
| |
| Affiliation: | 1. International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER), Kyushu University, 744 Moto‐oka, Nishi‐ku, Fukuoka 819‐0395 (Japan) http://www.cstm.kyushu‐u.ac.jp/ogo/;2. Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Moto‐oka, Nishi‐ku, Fukuoka 819‐0395 (Japan);3. Graduate School of Environmental Studies, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601 (Japan);4. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Kawaguchi Center Building, 4‐1‐8 Honcho, Kawaguchi, Saitama, 332‐0012 (Japan) |
| |
| 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. |
| |
| Keywords: | anode enzymes fuel cells hydrogen nickel |
|
|
