期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 35, 页码 14275-14278出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja304030y
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资金
- U.S. Department of Energy (DOE)
- Office of Basic Energy Sciences (BES)
- Division of Chemical Sciences, Geosciences, and Biosciences [DE-ACO2-98CH10886]
- DOE under the BES Hydrogen Fuel Initiative
A novel, highly efficient, and stable water oxidation catalyst was prepared by a pH-controlled adsorption of Co(II) on similar to 10 nm diameter silica nanoparticles. A lower limit of similar to 300 s(-1) per cobalt atom for the catalyst turnover frequency in oxygen evolution was estimated, which attests to a very high catalytic activity. Electron microscopy revealed that cobalt is adsorbed on the SiO2 nanoparticle surfaces as small (1-2 nm) clusters of Co(OH)(2). This catalyst is optically transparent over the entire UV-vis range and is thus suitable for mechanistic investigations by time-resolved spectroscopic techniques.
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