19 September 2011 Structural and mechanistic studies of tunable, stable, fast multi-cobalt water oxidation catalysts
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Abstract
New multi-cobalt-containing polyoxometalates (POMs) are soluble, fast and tunable water oxidation catalysts (WOCs). We report additional studies of [Co4(H2O)2(PW9O34)2]10- (1), a very fast, soluble and oxidative stable WOC: new kinetics data further indicate that Co2+ is not kinetically important in water oxidations catalyzed by 1. Second, we report a new WOC, [{Co4(ì-OH)(H2O)3}(Si2W19O70)]11- that coexists in a 1:1 ratio in the solid state (2a and 2b), and while it is oxidatively stable, it is not hydrolytically stable, rearranging to [Co(H2O)SiW11O39]6- in aqueous solution. All these studies provide insights relating structural, electronic and other features of these WOCs to their reactivity and stability.
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Guibo Zhu, Guibo Zhu, Hongjin Lv, Hongjin Lv, James W. Vickers, James W. Vickers, Yurii V. Geletii, Yurii V. Geletii, Zhen Luo, Zhen Luo, Jie Song, Jie Song, Zhuangqun Huang, Zhuangqun Huang, Djamaladdin G. Musaev, Djamaladdin G. Musaev, Craig L. Hill, Craig L. Hill, } "Structural and mechanistic studies of tunable, stable, fast multi-cobalt water oxidation catalysts", Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090A (19 September 2011); doi: 10.1117/12.894024; https://doi.org/10.1117/12.894024
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