Tailoring the Surface Chemistry of Activated Carbon Cloth by Electrochemical Methods

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Title: Tailoring the Surface Chemistry of Activated Carbon Cloth by Electrochemical Methods
Authors: Tabti, Zakaria | Ruiz-Rosas, Ramiro | Quijada Tomás, César | Cazorla-Amorós, Diego | Morallon, Emilia
Research Group/s: Materiales Carbonosos y Medio Ambiente | Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Electro-oxidation | Porous carbon materials | Activated carbon fiber | Functionalization | Surface chemistry | Surface modification
Knowledge Area: Química Inorgánica | Química Física
Issue Date: 23-Jun-2014
Publisher: American Chemical Society
Citation: ACS Applied Materials & Interfaces. 2014, 6(14): 11682-11691. doi:10.1021/am502475v
Abstract: This paper presents a systematic study of the effect of the electrochemical treatment (galvanostatic electrolysis in a filter-press electrochemical cell) on the surface chemistry and porous texture of commercial activated carbon cloth. The same treatments have been conducted over a granular activated carbon in order to clarify the effect of morphology. The influence of different electrochemical variables, such as the electrode polarity (anodic or cathodic), the applied current (between 0.2 and 1.0 A) and the type of electrolyte (HNO3 and NaCl) have also been analyzed. The anodic treatment of both activated carbons causes an increase in the amount of surface oxygen groups, whereas the cathodic treatment does not produce any relevant modification of the surface chemistry. The HNO3 electrolyte produced a lower generation of oxygen groups than the NaCl one, but differences in the achieved distribution of surface groups can be benefitial to selectively tune the surface chemistry. The porous texture seems to be unaltered after the electro-oxidation treatment. The validity of this method to introduce surface oxygen groups with a pseudocapacitive behavior has been corroborated by cyclic voltammetry. As a conclusion, the electrochemical treatment can be easily implemented to selectively and quantitatively modify the surface chemistry of activated carbons with different shapes and morphologies.
Sponsor: The authors thank the MINECO and FEDER for financial support (MAT2010-15273 project). R.R.R. gratefully acknowledges funding from MINECO through “Juan de la Cierva” program (JCI-2012-12664).
URI: http://hdl.handle.net/10045/44747
ISSN: 1944-8244 (Print) | 1944-8252 (Online)
DOI: 10.1021/am502475v
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 American Chemical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/am502475v
Appears in Collections:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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