Enhanced electron transfer kinetics through hybrid graphene-carbon nanotube films

We report the first study of the electrochemical reactivity of a graphenated carbon nanotube (g-CNT) film. The electron transfer kinetics of the ferri-ferrocyanide couple were examined for a g-CNT film and compared to the kinetics to standard carbon nanotubes (CNTs). The g-CNT film exhibited much hi...

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Bibliographic Details
Published in:Electrochemistry communications 2014-11, Vol.48, p.103-106
Main Authors: Henry, Philémon A., Raut, Akshay S., Ubnoske, Stephen M., Parker, Charles B., Glass, Jeffrey T.
Format: Article
Language:English
Subjects:
Chemistry
Edge planes
Electrochemistry
Electrodes: preparations and properties
Electron-transfer
Exact sciences and technology
General and physical chemistry
Hybrid graphene-carbon nanotubes film
Kinetics
Other electrodes
Raman spectra
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Summary:We report the first study of the electrochemical reactivity of a graphenated carbon nanotube (g-CNT) film. The electron transfer kinetics of the ferri-ferrocyanide couple were examined for a g-CNT film and compared to the kinetics to standard carbon nanotubes (CNTs). The g-CNT film exhibited much higher catalytic activity, with a heterogeneous electron-transfer rate constant, k0, approximately two orders of magnitude higher than for standard CNTs. Scanning electron microscopy and Raman spectroscopy were used to correlate the higher electron transfer kinetics with the higher edge-density of the g-CNT film. [Display omitted] •Grapheneated carbon nanotubes (g-CNT) films show faster kinetics than standard CNTs•g-CNTs have a higher edge density than CNTs•The faster kinetics of g-CNTs are correlated to their higher edge density.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2014.08.024