Water oxidation catalyzed by cobalt(II) adsorbed on silica nanoparticles

Tomer Zidki; Lihua Zhang; Vladimir Shafirovich; Sergei V. Lymar

doi:10.1021/ja304030y

Water oxidation catalyzed by cobalt(II) adsorbed on silica nanoparticles

Tomer Zidki, Lihua Zhang, Vladimir Shafirovich, Sergei V. Lymar

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

A novel, highly efficient, and stable water oxidation catalyst was prepared by a pH-controlled adsorption of Co(II) on ∼10 nm diameter silica nanoparticles. A lower limit of ∼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 SiO ₂ 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.

Original language	English
Pages (from-to)	14275-14278
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	134
Issue number	35
DOIs	https://doi.org/10.1021/ja304030y
State	Published - 5 Sep 2012
Externally published	Yes

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title = "Water oxidation catalyzed by cobalt(II) adsorbed on silica nanoparticles",

abstract = "A novel, highly efficient, and stable water oxidation catalyst was prepared by a pH-controlled adsorption of Co(II) on ∼10 nm diameter silica nanoparticles. A lower limit of ∼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 SiO 2 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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AU - Zhang, Lihua

AU - Shafirovich, Vladimir

AU - Lymar, Sergei V.

PY - 2012/9/5

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AB - A novel, highly efficient, and stable water oxidation catalyst was prepared by a pH-controlled adsorption of Co(II) on ∼10 nm diameter silica nanoparticles. A lower limit of ∼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 SiO 2 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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Water oxidation catalyzed by cobalt(II) adsorbed on silica nanoparticles

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