Enhancement of the Electrochemical Performance of SWCNT dispersed in a Silica Sol-gel Matrix by Reactive Insertion of a Conducting Polymer

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Title: Enhancement of the Electrochemical Performance of SWCNT dispersed in a Silica Sol-gel Matrix by Reactive Insertion of a Conducting Polymer
Authors: Gamero Quijano, Daniel Alonso | Huerta Arráez, Francisco | Salinas Torres, David | Morallon, Emilia | Montilla, Francisco
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: PANI | SWCNT | Sol-gel silica | Hybrid nanocomposite
Knowledge Area: Química Física
Issue Date: 20-Jul-2014
Publisher: Elsevier
Citation: Electrochimica Acta. 2014, 135: 114-120. doi:10.1016/j.electacta.2014.04.172
Abstract: The electroassisted encapsulation of Single-Walled Carbon Nanotubes was performed into silica matrices (SWCNT@SiO2). This material was used as the host for the potentiostatic growth of polyaniline (PANI) to yield a hybrid nanocomposite electrode, which was then characterized by both electrochemical and imaging techniques. The electrochemical properties of the SWCNT@SiO2-PANI composite material were tested against inorganic (Fe3+/Fe2+) and organic (dopamine) redox probes. It was observed that the electron transfer constants for the electrochemical reactions increased significantly when a dispersion of either SWCNT or PANI was carried out inside of the SiO2 matrix. However, the best results were obtained when polyaniline was grown through the pores of the SWCNT@SiO2 material. The enhanced reversibility of the redox reactions was ascribed to the synergy between the two electrocatalytic components (SWCNTs and PANI) of the composite material.
Sponsor: This work was financed by the following research projects: MAT2010-15273 of the Spanish Ministerio de Economia y Competitividad and CIVP16A1821 of the Fundación Ramón Areces and PROMETEO 2013/038 of the Generalitat Valenciana. Alonso Gamero-Quijano is grateful to Generalitat Valenciana (Santiago Grisolia Program) for the funding of his research fellowship. David Salinas-Torres is grateful to Ministerio de Economia y Competitividad for the funding of his research fellowship.
URI: http://hdl.handle.net/10045/46335
ISSN: 0013-4686 (Print) | 1873-3859 (Online)
DOI: 10.1016/j.electacta.2014.04.172
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier Ltd.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.electacta.2014.04.172
Appears in Collections:INV - GEPE - Artículos de Revistas

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