[NiFe]Hydrogenase from Citrobacter sp. S-77 surpasses platinum as an electrode for H2 oxidation reaction

Takahiro Matsumoto; Shigenobu Eguchi; Hidetaka Nakai; Takashi Hibino; Ki-Seok Yoon; Seiji Ogo

doi:10.1002/anie.201404701

[NiFe]Hydrogenase from Citrobacter sp. S-77 surpasses platinum as an electrode for H2 oxidation reaction

Angew Chem Int Ed Engl. 2014 Aug 18;53(34):8895-8. doi: 10.1002/anie.201404701. Epub 2014 Jun 4.

Authors

Takahiro Matsumoto¹, Shigenobu Eguchi, Hidetaka Nakai, Takashi Hibino, Ki-Seok Yoon, 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/; Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395 (Japan).

PMID: 24895095
DOI: 10.1002/anie.201404701

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bioelectric Energy Sources
Citrobacter / enzymology*
Dielectric Spectroscopy
Electrodes*
Hydrogen / chemistry*
Hydrogenase / chemistry*
Oxidation-Reduction
Platinum / chemistry*

Substances

Platinum
Hydrogen
nickel-iron hydrogenase
Hydrogenase