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  Interaction of cobalt nanoparticles with oxygen- and nitrogen- functionalized carbon nanotubes and impact on nitrobenzene hydrogenation catalysis

Chen, P., Yang, F., Kostka, A., & Xia, W. (2014). Interaction of cobalt nanoparticles with oxygen- and nitrogen- functionalized carbon nanotubes and impact on nitrobenzene hydrogenation catalysis. ACS Catalysis, 4(5), 1478-1486. doi:10.1021/cs500173t.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-C0E0-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-C0E1-7
Genre: Journal Article

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 Creators:
Chen, Peirong1, Author              
Yang, Fengkai2, Author              
Kostka, Aleksander3, Author              
Xia, Wei2, Author              
Affiliations:
1Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätstrasse 150, Bochum, Germany, ou_persistent22              
2Laboratory of Industrial Chemistry, Ruhr-University Bochum, 44780 Bochum, Germany, ou_persistent22              
3High-Temperature Materials, External Max Planck Fellow, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863347              

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Free keywords: Carbon nanotubes; Catalysis; Cobalt; Hydrogenation; Metallic compounds; Nitrobenzene; Nitrogen; Surfaces, Ambient atmosphere; Cobalt nanoparticles; Functionalized carbon nanotubes; Hydrogenation catalysis; Nitrobenzene hydrogenation; Nitrogen-doping; Reaction conditions; Selective hydrogenation, Nanoparticles
 Abstract: The type and the amount of functional groups on the surface of carbon nanotubes (CNTs) were tuned to improve the activity of supported Co nanoparticles in hydrogenation catalysis. Surface nitrogen species on CNTs significantly promoted the decomposition of the cobalt precursor and the reduction of cobalt oxide, and improved the resistance of metallic Co against oxidation in ambient atmosphere. In the selective hydrogenation of nitrobenzene in the gas phase, Co supported on CNTs with the highest surface nitrogen content showed the highest activity, which is ascribed to the higher reducibility and the lower oxidation state of the Co nanoparticles under reaction conditions. For Co nanoparticles supported on CNTs with a smaller amount of surface nitrogen groups, a repeated reduction at 350 °C was essential to achieve a comparable high catalytic activity reaching 90 conversion at 250 °C, pointing to the importance of nitrogen species for the supported Co nanoparticles in nitrobenzene hydrogenation. © 2014 American Chemical Society.

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Language(s): eng - English
 Dates: 2014-05-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/cs500173t
BibTex Citekey: Chen20141478
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: - Volume / Issue: 4 (5) Sequence Number: - Start / End Page: 1478 - 1486 Identifier: Other: 2155-5435
CoNE: /journals/resource/2155-5435