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- W2560111986 abstract "A variety of metal oxides can catalyze the oxidation of water to molecular oxygen when polarized by a sufficiently high electrochemical potential. Minimizing the overpotential and increasing the rate of the oxygen-evolving reaction (OER) are key goals in making such materials a component of viable energy storage devices. However, the structural factors that imbue the metal oxides with their catalytic power are difficult to assess as these solids contain many distinct metal-ion sites, have a varying amount of defect sites within the lattice, and can be composed of multiple phases. In the present study, we determined the magnetic properties for a series of dimeric cobalt complexes in which the two metal centers are bridged by a dioxygen moiety. Our spectroscopically validated electronic structure description indicates that each species is best described as two Co(III) ions that are bound to a μ-η1η1 superoxide ligand. Intriguingly, we found evidence that the two compounds that possess oxygen-evolving activity coordinate the superoxide ion in an unusual, nonplanar fashion. It appears as if the intermediately long Co···Co distance of 3.9 Å is responsible for the unusual superoxide binding geometry. This structural factor may be an important element in the design of solid-state OER catalysts." @default.
- W2560111986 created "2016-12-16" @default.
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- W2560111986 date "2016-12-05" @default.
- W2560111986 modified "2023-10-06" @default.
- W2560111986 title "Electron Paramagnetic Resonance Characterization of Dioxygen-Bridged Cobalt Dimers with Relevance to Water Oxidation" @default.
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- W2560111986 doi "https://doi.org/10.1021/acs.inorgchem.6b01954" @default.
- W2560111986 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27989208" @default.
- W2560111986 hasPublicationYear "2016" @default.
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