A homogeneous cobalt complex mediated electro and photocatalytic O₂/H₂O interconversion in neutral water.

ABSTRACT: The O₂/H₂O redox couple is vital in various renewable energy conversion strategies. This work delves into the Co(L-histidine)₂ complex, a functional mimic of oxygen-carrying metalloproteins, and its electrochemical behavior driving the bidirectional oxygen reduction (ORR) and oxygen evolution (OER) activity in neutral water. This complex electrocatalyzes O₂ via two distinct pathways: a two-electron O₂/H₂O₂ reduction (catalytic rate = 250 s^-1) and a four-electron O₂ to H₂O production (catalytic rate = 66 s^-1). The formation of the key trans-μ-1,2-Co(III)-peroxo intermediate expedites this process. Additionally, this complex effectively oxidizes water to O₂

SUBMITTER: Saini A 

PROVIDER: S-EPMC10618691 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature