Jump to main content
Jump to site search

Issue 2, 2009
Previous Article Next Article

Deposition of an oxomanganese water oxidationcatalyst on TiO2nanoparticles: computational modeling, assembly and characterization

Author affiliations

Abstract

Inexpensive water oxidation catalysts are needed to develop photocatalytic solar cells that mimic photosynthesis and produce fuel from sunlight and water. This paper reports the successful attachment of a dinuclear di-µ-oxo manganese water oxidation catalyst [H2O(terpy)MnIII(µ-O)2 MnIV(terpy)H2O](NO3)3 (1, terpy = 2,2′:6′2″-terpyridine) onto TiO2 nanoparticles (NPs) via direct adsorption, or in situ synthesis. The resulting surface complexes are characterized by EPR and UV-visible spectroscopy, electrochemical measurements and computational modeling. We conclude that the mixed-valence (III,IV) state of 1 attaches to near-amorphous TiO2 NPs by substituting one of its water ligands by the TiO2 NP, as suggested by low-temperature (7 K) EPR data. In contrast, the analogous attachment onto well-crystallized TiO2 NPs leads to dimerization of 1 forming Mn(IV) tetramers on the TiO2 surface as suggested by EPR spectroscopy and electrochemical studies.

Graphical abstract: Deposition of an oxomanganese water oxidation catalyst on TiO2 nanoparticles: computational modeling, assembly and characterization

Back to tab navigation

Supplementary files

Article information


Submitted
22 Oct 2008
Accepted
04 Dec 2008
First published
12 Jan 2009

Energy Environ. Sci., 2009,2, 230-238
Article type
Paper

Deposition of an oxomanganese water oxidation catalyst on TiO2 nanoparticles: computational modeling, assembly and characterization

G. Li, E. M. Sproviero, R. C. Snoeberger III, N. Iguchi, J. D. Blakemore, R. H. Crabtree, G. W. Brudvig and V. S. Batista, Energy Environ. Sci., 2009, 2, 230
DOI: 10.1039/B818708H

Social activity

Search articles by author

Spotlight

Advertisements