Electrocatalytic water oxidation by a molecular catalyst incorporated into a metal-organic framework thin film.

ABSTRACT: A molecular water oxidation catalyst, [Ru(tpy)(dcbpy)(OH₂)](ClO₄)₂ (tpy = 2,2':6',2''-terpyridine, dcbpy = 2,2'-bipyridine-5,5'-dicarboxylic acid) [1], has been incorporated into FTO-grown thin films of UiO-67 (UiO = University of Oslo), by post-synthetic ligand exchange. Cyclic voltammograms (0.1 M borate buffer at pH = 8.4) of the resulting UiO67-[RuOH₂]@FTO show a reversible wave associated with the Ru^III/II couple in the anodic scan, followed by a large current response that arises from electrocatalytic water oxidation beyond 1.1 V vs. Ag/AgCl. Water oxidation can be observed at an applied potential of 1.5 V over the timescale of hours with a current density of 11.5 μA cm^-2. Oxygen evolution was quantified in situ over t

SUBMITTER: Johnson BA 

PROVIDER: S-EPMC6095457 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature