Interfacial doping of carbon nanotubes at the polarisable organic/water interface: a liquid/liquid pseudo-capacitor

Peter Toth; Andrew N.J. Rodgers; Aminu Rabiu; D. Ibañez; J. X. Yang; A. Colina; Robert Dryfe

doi:10.1039/C6TA02489K

Interfacial doping of carbon nanotubes at the polarisable organic/water interface: a liquid/liquid pseudo-capacitor

Peter Toth, Andrew N.J. Rodgers, Aminu Rabiu, D. Ibañez, J. X. Yang, A. Colina, Robert Dryfe

Universidad de Burgos

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

Abstract

The electrochemical reactivity of single-walled carbon nanotube (SWCNT) films, assembled at a polarisable organic/water interface, has been probed using model redox species. Electrons generated by the oxidation of organic 1,1’-
dimethylferrocene (DMFc) to DMFc+ can be transferred through the assembled SWCNT layer and reduce aqueous ferricyanide (Fe(CN)_6^3- to ferrocyanide (Fe(CN)_6^4-), with a doping interaction observed. Several electrochemical
techniques, including cyclic voltammetry and electrochemical impedance spectroscopy (EIS), were employed to confirm that the model redox couples dope/charge the SWCNTs. In situ Raman spectro-electrochemistry was also applied to verify the charge transfer processes occurring at the assembled SWCNT films and confirm that the doping effect of the carbon
nanotubes is initiated by electrochemical reactions. This doping interaction indicating that the adsorbed SWCNT films can act as a pseudo-capacitor, showing a high area-normalised capacitance. The deeper understanding of the electrochemical properties of SWCNTs, gained from this study, will help determine the performance of this material for practical applications.

Original language	English
Pages (from-to)	7365-7371
Journal	Journal of Materials Chemistry A
Volume	4
DOIs	https://doi.org/10.1039/C6TA02489K
Publication status	Published - 11 Apr 2016

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10.1039/C6TA02489KLicence: CC BY

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title = "Interfacial doping of carbon nanotubes at the polarisable organic/water interface: a liquid/liquid pseudo-capacitor",

abstract = "The electrochemical reactivity of single-walled carbon nanotube (SWCNT) films, assembled at a polarisable organic/water interface, has been probed using model redox species. Electrons generated by the oxidation of organic 1,1{\textquoteright}-dimethylferrocene (DMFc) to DMFc+ can be transferred through the assembled SWCNT layer and reduce aqueous ferricyanide (Fe(CN)63- to ferrocyanide (Fe(CN)64-), with a doping interaction observed. Several electrochemicaltechniques, including cyclic voltammetry and electrochemical impedance spectroscopy (EIS), were employed to confirm that the model redox couples dope/charge the SWCNTs. In situ Raman spectro-electrochemistry was also applied to verify the charge transfer processes occurring at the assembled SWCNT films and confirm that the doping effect of the carbonnanotubes is initiated by electrochemical reactions. This doping interaction indicating that the adsorbed SWCNT films can act as a pseudo-capacitor, showing a high area-normalised capacitance. The deeper understanding of the electrochemical properties of SWCNTs, gained from this study, will help determine the performance of this material for practical applications.",

author = "Peter Toth and Rodgers, {Andrew N.J.} and Aminu Rabiu and D. Iba{\~n}ez and Yang, {J. X.} and A. Colina and Robert Dryfe",

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doi = "10.1039/C6TA02489K",

language = "English",

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T1 - Interfacial doping of carbon nanotubes at the polarisable organic/water interface: a liquid/liquid pseudo-capacitor

AU - Toth, Peter

AU - Rodgers, Andrew N.J.

AU - Rabiu, Aminu

AU - Ibañez, D.

AU - Yang, J. X.

AU - Colina, A.

AU - Dryfe, Robert

PY - 2016/4/11

Y1 - 2016/4/11

N2 - The electrochemical reactivity of single-walled carbon nanotube (SWCNT) films, assembled at a polarisable organic/water interface, has been probed using model redox species. Electrons generated by the oxidation of organic 1,1’-dimethylferrocene (DMFc) to DMFc+ can be transferred through the assembled SWCNT layer and reduce aqueous ferricyanide (Fe(CN)63- to ferrocyanide (Fe(CN)64-), with a doping interaction observed. Several electrochemicaltechniques, including cyclic voltammetry and electrochemical impedance spectroscopy (EIS), were employed to confirm that the model redox couples dope/charge the SWCNTs. In situ Raman spectro-electrochemistry was also applied to verify the charge transfer processes occurring at the assembled SWCNT films and confirm that the doping effect of the carbonnanotubes is initiated by electrochemical reactions. This doping interaction indicating that the adsorbed SWCNT films can act as a pseudo-capacitor, showing a high area-normalised capacitance. The deeper understanding of the electrochemical properties of SWCNTs, gained from this study, will help determine the performance of this material for practical applications.

AB - The electrochemical reactivity of single-walled carbon nanotube (SWCNT) films, assembled at a polarisable organic/water interface, has been probed using model redox species. Electrons generated by the oxidation of organic 1,1’-dimethylferrocene (DMFc) to DMFc+ can be transferred through the assembled SWCNT layer and reduce aqueous ferricyanide (Fe(CN)63- to ferrocyanide (Fe(CN)64-), with a doping interaction observed. Several electrochemicaltechniques, including cyclic voltammetry and electrochemical impedance spectroscopy (EIS), were employed to confirm that the model redox couples dope/charge the SWCNTs. In situ Raman spectro-electrochemistry was also applied to verify the charge transfer processes occurring at the assembled SWCNT films and confirm that the doping effect of the carbonnanotubes is initiated by electrochemical reactions. This doping interaction indicating that the adsorbed SWCNT films can act as a pseudo-capacitor, showing a high area-normalised capacitance. The deeper understanding of the electrochemical properties of SWCNTs, gained from this study, will help determine the performance of this material for practical applications.

U2 - 10.1039/C6TA02489K

DO - 10.1039/C6TA02489K

M3 - Article

SN - 2050-7488

VL - 4

SP - 7365

EP - 7371

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

ER -

Interfacial doping of carbon nanotubes at the polarisable organic/water interface: a liquid/liquid pseudo-capacitor

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