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Proceedings Paper

Structural and mechanistic studies of tunable, stable, fast multi-cobalt water oxidation catalysts
Author(s): Guibo Zhu; Hongjin Lv; James W. Vickers; Yurii V. Geletii; Zhen Luo; Jie Song; Zhuangqun Huang; Djamaladdin G. Musaev; Craig L. Hill
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Paper 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.

Paper Details

Date Published: 19 September 2011
PDF: 6 pages
Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090A (19 September 2011); doi: 10.1117/12.894024
Show Author Affiliations
Guibo Zhu, Emory Univ. (United States)
Hongjin Lv, Emory Univ. (United States)
James W. Vickers, Emory Univ. (United States)
Yurii V. Geletii, Emory Univ. (United States)
Zhen Luo, Emory Univ. (United States)
Jie Song, Emory Univ. (United States)
Zhuangqun Huang, Emory Univ. (United States)
Djamaladdin G. Musaev, Emory Univ. (United States)
Craig L. Hill, Emory Univ. (United States)

Published in SPIE Proceedings Vol. 8109:
Solar Hydrogen and Nanotechnology VI
Yasuhiro Tachibana, Editor(s)

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