一种基于四面体钴-硒的分子配合物作为高效电催化剂用于水分解。

Department of Chemistry, Missouri University of Science & Technology, Rolla, MO 65409, USA.

Electrochemical Process Development, Energy & Environmental Research Centre, Grand Forks, ND 58202, USA.

Molecules. 2021 Feb 10;26(4):945. doi: 10.3390/molecules26040945.

The cobalt-seleno-based coordination complex, [Co{(SePPr)N}], is reported with respect to its catalytic activity in oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solutions. An overpotential of 320 and 630 mV was required to achieve 10 mA cm for OER and HER, respectively. The overpotential for OER of this -containing complex is one of the lowest that has been observed until now for molecular cobalt(II) systems, under the reported conditions. In addition, this cobalt-seleno-based complex exhibits a high mass activity (14.15 A g) and a much higher turn-over frequency (TOF) value (0.032 s) at an overpotential of 300 mV. These observations confirm analogous ones already reported in the literature pertaining to the potential of molecular cobalt-seleno systems as efficient OER electrocatalysts.

本文报道了钴-硒基配位化合物 [Co{(SePPr)N}] 在碱性溶液中对氧气析出反应（OER）和析氢反应（HER）的催化活性。OER 和 HER 分别需要 320 mV 和 630 mV 的过电位才能达到 10 mA cm。在报道的条件下，该含钴复合物的 OER 过电位是迄今为止观察到的最低的分子钴（II）体系之一。此外，在 300 mV 的过电位下，该钴-硒基配合物表现出高质量活性（14.15 A g）和更高的周转频率（TOF）值（0.032 s）。这些观察结果证实了文献中已经报道的分子钴-硒体系作为高效 OER 电催化剂的潜力。