希瓦氏菌属 S-77 的 [NiFe]氢化酶优于铂作为 H2 氧化反应的电极。
[NiFe]Hydrogenase from Citrobacter sp. S-77 surpasses platinum as an electrode for H2 oxidation reaction.
机构信息
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).
出版信息
Angew Chem Int Ed Engl. 2014 Aug 18;53(34):8895-8. doi: 10.1002/anie.201404701. Epub 2014 Jun 4.
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.
本文报道了一种用于二氢（H2）氧化的电极，它基于柠檬酸杆菌 S-77 的[NiFe]氢化酶([NiFe]S77)。在氢半电池中，50 mV 时，[NiFe]S77 的质量活性比 Pt（基于 1mg 的[NiFe]S77 或 Pt 计算）高 637 倍。[NiFe]S77 电极在空气中也很稳定，并且与 Pt 不同，在被一氧化碳中毒后可以 100%回收。对[NiFe]S77 电极进行表征后，构建了一个包含[NiFe]S77 阳极和 Pt 阴极的燃料电池，其功率密度高于 Pt 可实现的功率密度。
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