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Multi-Electron-Transfer Catalysts Needed for Artificial Photosynthesis

Published online by Cambridge University Press:  18 May 2012

James Vickers ,
Hongjin Lv ,
Petro F. Zhuk ,
Yurii V. Geletii  and
Craig L. Hill
James Vickers
Affiliation:
Department of Chemistry, Emory University, Atlanta, Georgia 30322, U.S.A.
Hongjin Lv
Affiliation:
Department of Chemistry, Emory University, Atlanta, Georgia 30322, U.S.A.
Petro F. Zhuk
Affiliation:
National Aviation University, Kiev, Ukraine
Yurii V. Geletii
Affiliation:
Department of Chemistry, Emory University, Atlanta, Georgia 30322, U.S.A.
Craig L. Hill
Affiliation:
Department of Chemistry, Emory University, Atlanta, Georgia 30322, U.S.A.
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Abstract

We 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).

Keywords

catalytickineticsoxidation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1387: Symposium E – Advanced Materials for Solar-Fuel Generation , 2012 , mrsf11-1387-e02-01
Copyright
Copyright © Materials Research Society 2012

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References

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