Electrocatalytic O₂ reduction by a monolayer of hemin: the role of pK(a) of distal and proximal oxygen of a Fe(III)-OOH species in determining reactivity

Chem Commun (Camb). 2014 Oct 21;50(82):12304-7. doi: 10.1039/c4cc03886j.

Abstract

Investigation of the proton coupled electron transfer steps involved in electrocatalytic ORR by hemin modified electrodes allows the determination of pK(a)s of the proximal and distal oxygen atoms of a rate determining Fe(III)-OOH species.