Emory University The Craig Hill Research Group

H2O oxidation catalysis

Last Updated: 10/18/2013

Water oxidation catalysts (WOCs) must be designed to be hydrolytically, thermally and oxidatively stable under catalytic conditions. WOCs, in general, must posess multiple redox active metal sites, to accumulate charge during multi-electron redox reactions, such as water oxidation. POMs are capable of meeting such high demands and recently, several POM WOCs have been reported. In 2008, the complex, [{Ru4O4(OH)2(H2O)4}(γ-SiW10O36)2]10-, Ru4POM, was shown to  catalyze water oxidation at near neutral pH, both electrochemically and photochemically. In 2010, the complex, [Co4(H2O)2(PW9O34)2]10-, Co4POM, was reported to catalyze photochemical water oxidation at near neutral pH. At the time, Co4POM was the fastest reported molecular WOC, with a TOF of 5 s-1. This area is continuing to develop, and was recently reviewed in 2012. 

Students working on this project: James Vickers, Hongjin Lv, Jordan Sumliner & Guibo Zhu

 

                              

 

Ru4POM, left and Co4POM, right represent a class of carbon-free, soluble WOCs.
 

JACS, 2008, 131, 17360-17370

Science, 2010, 328, 342-345

JACS, 2013, 135, 14110-14118

Chem. Soc. Rev., 2012, 41, 7572-7589


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