The improved electrochemical performance of cross-linked 3D graphene nanoribbon monolith electrodes

Thazhe Veettil Vineesh; Subbiah Alwarappan; Tharangattu N. Narayanan

doi:10.1039/c4nr07315k

The improved electrochemical performance of cross-linked 3D graphene nanoribbon monolith electrodes

Thazhe Veettil Vineesh, Subbiah Alwarappan, Tharangattu N. Narayanan

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Technical advancement in the field of ultra-small sensors and devices demands the development of novel micro- or nano-based architectures. Here we report the design and assembly of cross-linked three dimensional graphene nanoribbons (3D GNRs) using solution based covalent binding of individual 2D GNRs and demonstrate its electrochemical application as a 3D electrode. The enhanced performance of 3D GNRs over individual 2D GNRs is established using standard redox probes-[Ru(NH₃)₆]^3+/2+, [Fe(CN)₆]^3-/4- and important bio-analytes-dopamine and ascorbic acid. 3D GNRs are found to have high double layer capacitance (2482 μF cm^-2) and faster electron transfer kinetics; their exceptional electrocatalytic activity towards the oxygen reduction reaction is indicative of their potential over a wide range of electrochemical applications. Moreover, this study opens a new platform for the design of novel point-of-care devices and electrodes for energy devices.

Original language	English
Pages (from-to)	6504-6509
Number of pages	6
Journal	Nanoscale
Volume	7
Issue number	15
DOIs	https://doi.org/10.1039/c4nr07315k
State	Published - 21 Apr 2015
Externally published	Yes

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© The Royal Society of Chemistry.

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University Grants Committee

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abstract = "Technical advancement in the field of ultra-small sensors and devices demands the development of novel micro- or nano-based architectures. Here we report the design and assembly of cross-linked three dimensional graphene nanoribbons (3D GNRs) using solution based covalent binding of individual 2D GNRs and demonstrate its electrochemical application as a 3D electrode. The enhanced performance of 3D GNRs over individual 2D GNRs is established using standard redox probes-[Ru(NH3)6]3+/2+, [Fe(CN)6]3-/4- and important bio-analytes-dopamine and ascorbic acid. 3D GNRs are found to have high double layer capacitance (2482 μF cm-2) and faster electron transfer kinetics; their exceptional electrocatalytic activity towards the oxygen reduction reaction is indicative of their potential over a wide range of electrochemical applications. Moreover, this study opens a new platform for the design of novel point-of-care devices and electrodes for energy devices.",

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The improved electrochemical performance of cross-linked 3D graphene nanoribbon monolith electrodes

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