Gamero-Quijano, Alonso, Huerta Arráez, Francisco, Salinas-Torres, David, Morallon, Emilia, Montilla, Francisco
Enhancement of the Electrochemical Performance of SWCNT dispersed in a Silica Sol-gel Matrix by Reactive Insertion of a Conducting Polymer
Electrochimica Acta. 2014, 135: 114-120. doi:10.1016/j.electacta.2014.04.172
URI: http://hdl.handle.net/10045/46335
DOI: 10.1016/j.electacta.2014.04.172
ISSN: 0013-4686 (Print)
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.
Keywords:PANI, SWCNT, Sol-gel silica, Hybrid nanocomposite
Elsevier
info:eu-repo/semantics/article