Journal: 2011 MRS Fall Meeting
Manuscript ID: Draft
Manuscript Type: Symposium E
Date Submitted by the Author: n/a
Complete List of Authors: Vickers, James; Emory University, Chemistry
Lv, Hongjin; Emory University, Chemistry
Zhuk, Petro; National Aviation University,
Geletii, Yurii; Emory University, Chemistry
Hill, Craig; Emory University, Chemistry
Keywords: catalytic, kinetics, oxidationWe report a study on catalytic water oxidation by cobalt in oxygen ligand environments
because such systems are as promising as any in the water oxidation component of solar fuel
production. We have re-examined the catalytic activity of Co(II) in aqueous solution using either
[Ru(bpy)3]3+ as a stoichiometric oxidant or in visible-light-driven reactions with persulfate as a
sacrificial electron acceptor. In both systems a distinctive induction period is observed. A simple
kinetic model is proposed that describes the experimental data well. The presence of an
induction period is explained by relatively slow formation of the true catalyst from
aquacobalt(II)
