Multi-walled carbon nanotubes/graphene nanoribbons hybrid materials with superior electrochemical performance

Graphene nanoribbons (GNRs) were synthesized by oxidation of arc discharge multi-walled carbon nanotubes (MWCNTs) in concentrated H2SO4 using KMnO4 as oxidizing agent at different times from 15 to 120min. One of the GNR samples was further electrochemically and chemically reduced. The material obtai...

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Bibliographic Details
Published in:Electrochemistry communications 2014-02, Vol.39, p.26-29
Main Authors: Hernández-Ferrer, Javier, Laporta, Pablo, Gutiérrez, Fabiana, Rubianes, María D., Rivas, Gustavo, Martínez, Mª Teresa
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Electrochemical methods
Electrochemical sensing
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Graphene nanoribbons
Hybrid materials
Other electrodes
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Summary:Graphene nanoribbons (GNRs) were synthesized by oxidation of arc discharge multi-walled carbon nanotubes (MWCNTs) in concentrated H2SO4 using KMnO4 as oxidizing agent at different times from 15 to 120min. One of the GNR samples was further electrochemically and chemically reduced. The material obtained after 15min of oxidation time (GNR015) was a hybrid material containing MWCNTs, partially unzipped GNRs-MWCNTs and fully unzipped GNRs, and it demonstrated a superior electrochemical performance. This material presented the highest heterogeneous charge transfer constant and sensitivity towards H2O2 reduction. These properties are due to the balance between the content of unzipped MWCNTs, Csp2 carbon structure and oxygen moieties. GNR015, thus reveals as a promising platform for further applications in electrochemical sensing. •A hybrid GNR-MWCNT material has been synthesized in a simple, low-cost procedure.•It has high electroactive area and very fast electron transfer.•This nanomaterial possesses high activity towards H2O2 reduction.•Electrochemical properties of this material are better than MWCNTs and GNRs.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2013.12.006