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Polyoxometalate ions are used as ligands in water‐oxidation processes related to solar energy production. An important step in these reactions is the association and dissociation of water from the catalytic sites, the rates of which are unknown. Here we report the exchange rates of water ligated to CoII atoms in two polyoxotungstate sandwich molecules using the 17O‐NMR‐based Swift–Connick method....
A new catalytic kinetic spectrophotometric method for the determination of trace amount of cobalt(II) in microemulsion medium has been developed. This method is based on the catalytic effect of cobalt(II) on the hydrogen peroxide(H2O2) oxidation of hydroxyphenyl fluorone (DBH-PF) in the presence of cetyltrimethylammonium bromide (CTMAB) microemulsion medium and NaOH medium. All the variables were...
The oxidation of nanosized metallic cobalt to cobalt oxide during Fischer–Tropsch synthesis has long been postulated as a major deactivation mechanism apparently related to cobalt crystallite size. To establish a connection between cobalt crystallite size and oxidation behaviour, well-defined spherical Co/SiO 2 model catalysts with average cobalt crystallites sizes of 4, 13, and 28 nm were...
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