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

Chen, Peirong; Yang, Fengkai; Kostka, Aleksander; Xia, Wei

doi:10.1021/cs500173t

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

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

MPS-Authors

/persons/resource/persons125233

Kostka, Aleksander
High-Temperature Materials, External Max Planck Fellow, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

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.

Cite as: https://hdl.handle.net/21.11116/0000-0001-C0E0-8

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.