期刊
ELECTROCHIMICA ACTA
卷 110, 期 -, 页码 465-473出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.04.056
关键词
Iridium oxide composites; Nanomaterials; Electrocatalytic oxidation; Arsenic; Ultrafiltration
资金
- ECOS-CONICYT [C07E07]
- CNRS-CONYCIT [19960]
- FONDECT [1110079]
- PIA (Anillo ACT 130)
- Region Rhone-Alpes
- [ANR-11-LABX-003]
Nanocomposite materials have been synthesized by electrodeposition of iridium oxide nanoparticles into poly(pyrrole-alkylammonium) films coated by oxidative electropolymerization of a pyrrole-alkylammonium monomer onto carbon electrodes, and characterized by electrochemistry in aqueous electrolytes and by transmission electron microscopy. Iridium oxide-based nanocomposite electrode materials appeared efficient electrocatalysts for the oxidation of arsenic(III) into arsenic(V) species at low potentials, i.e. in the 03-0.7V vs. Ag/AgCl range, and over a large pH range. Bulk electrocatalytic oxidation of arsenite solutions could be performed in the presence of a water-soluble poly(quaternary ammonium) salt acting as the supporting electrolyte and also as an As(V) complexing agent, which allowed the combination of electrocatalytic oxidation of As(III) with the liquid phase polymer-assisted retention (LPR) technique to efficiently remove arsenic from polluted solutions. (C) 2013 Elsevier Ltd. All rights reserved.
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