Light-Driven Water Oxidation with Metal Hexacyanometallate Heterogeneous Catalysts

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Institute of Chemical Research of Catalonia (ICIQ), Avnida Paisos Catalans 16, E-43007 Tarragona, Spain
Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluis Companys, 23, E-08010 Barcelona, Spain
Cite this: ACS Catal. 2014, 4, 6, 1637–1641
Publication Date (Web):April 16, 2014
https://doi.org/10.1021/cs500298e
Copyright © 2014 American Chemical Society
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Abstract

The catalytic activity of metal hexacyanometallates (Prussian blue-type coordination polymers) was tested in photoactivated water oxidation by [Ru(2-2′-bpy)3]2+/persulfate system at pH close to neutrality. This screening shows that manganese and cobalt N-coordinated compounds are able to catalyze the oxygen evolution reaction. Mn hexacyanometalates show low activity. Co hexacyanometalates, in contrast, appear highly active and promote robust catalysis with excellent quantum yield (≤88%), even in acidic media. Our results indicate that these catalysts are viable candidates for a photoactivated water oxidation process as part of an artificial photosynthesis scheme.

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Experimental details regarding synthesis, catalysis, and oxygen monitoring; structural and spectroscopic characterization data. This material is available free of charge via the Internet at http://pubs.acs.org.

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