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  Activating cobalt nanoparticles via the Mott-Schottky effect in nitrogen-rich carbon shells for base-free aerobic oxidation of alcohols to esters

Su, H., Zhang, K.-X., Zhang, B., Wang, H.-H., Yu, Q.-Y., Li, X.-H., et al. (2017). Activating cobalt nanoparticles via the Mott-Schottky effect in nitrogen-rich carbon shells for base-free aerobic oxidation of alcohols to esters. Journal of the American Chemical Society, 139(2), 811-818. doi:10.1021/jacs.6b10710.

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 Creators:
Su, Hui, Author
Zhang, Ke-Xin, Author
Zhang, Bing, Author
Wang, Hong-Hui, Author
Yu, Qiu-Ying, Author
Li, Xin-Hao, Author
Antonietti, Markus1, Author           
Chen, Jie-Sheng, Author
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1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Heterogeneous catalysts of inexpensive and reusable transition-metal are attractive alternatives to homogeneous cat-alysts; the relatively low activity of transition-metal nanoparticles has become the main hurdle for their practical ap-plications. Here, the de novo design of a Mott-Schottky-type heterogeneous catalyst is reported to boost the activity of a transition-metal nanocatalyst through electron transfer at the metal/nitrogen-doped carbon interface. The Mott-Schottky catalyst of nitrogen-rich carbon-coated cobalt nanoparticles (Co@NC) was prepared through direct polycon-densation of simple organic molecules and inorganic metal salts in the presence of g-C3N4 powder. The Co@NC with controllable nitrogen content and thus tunable Fermi energy and catalytic activity exhibited a high turnover frequency (TOF) value (8.12 mol methyl benzoate mol-1 Co h-1) for the direct, base-free, aerobic oxidation of benzyl alcohols to methyl benzoate; this TOF is 30-fold higher than those of the state-of-the-art transition-metal-based nanocatalysts reported in the literature. The presented efficient Mott-Schottky catalyst can trigger the synthesis of a series of alkyl esters and even diesters in high yields.

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 Dates: 2016-12-232017
 Publication Status: Issued
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 Identifiers: DOI: 10.1021/jacs.6b10710
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Title: Journal of the American Chemical Society
  Other : J. Am. Chem. Soc.
  Abbreviation : JACS
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 139 (2) Sequence Number: - Start / End Page: 811 - 818 Identifier: ISSN: 0002-7863