High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols
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Título: | High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols |
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Autor/es: | García Cruz, Leticia | Casado-Coterillo, Clara | Irabien, Ángel | Montiel, Vicente | Iniesta, Jesus |
Grupo/s de investigación o GITE: | Electroquímica Aplicada y Electrocatálisis |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Palabras clave: | Graphene oxide | Graphene composite electrolyte membrane | Chitosan | Poly (vinyl) alcohol | Alkaline anion-exchange membrane (AAEM) | Alcohol permeability |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 1-abr-2016 |
Editor: | MDPI |
Cita bibliográfica: | García-Cruz L, Casado-Coterillo C, Irabien Á, Montiel V, Iniesta J. High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols. C. 2016; 2(2):10. doi:10.3390/c2020010 |
Resumen: | Mixed matrix membranes (MMM) based on chitosan (CS) and poly (vinyl) alcohol (PVA) with a 50:50 w/w ratio doped with graphene oxide (GO) are prepared by solution casting and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), water uptake, alcohol permeability, ion exchange capacity (IEC) and OH− conductivity measurements. The SEM analysis revealed a dense MMM where the GO nanosheets were well dispersed over the entire polymer matrix. The incorporation of GO increased considerably the thermal stability of the CS:PVA membrane. The GO-based MMM exhibited a low conductivity of 0.19 mS·cm−1 in part because the GO sheets did not change the crystallinity of the CS:PVA matrix. The reinforced structure created by the hydrogen bonds between the GO filler and the CS:PVA matrix resulted to be a good physical barrier for alcohol permeability, achieving a coefficient of diffusion of 3.38 × 10−7 and 2.43 × 10−7 cm2·s−1 after 60 and 120 min, respectively, thus avoiding additional alcohol crossover. Finally, the electrochemical performance of the GO-based MMM in the electrooxidation of propargyl alcohol was investigated in a Polymer Electrolyte Membrane Electrochemical Reactor (PEMER) under alkaline conditions, through the polarization curve and the electrolysis reactions, showing a performance comparable to anion-exchange commercial membranes. |
Patrocinador/es: | This work has been funded by the Spanish MINECO through projects CTQ2012-31229 and the “Ramón y Cajal” grant RYC2011-08550 (C.C.C.), at the University of Cantabria, and the PhD fellowship BES-2011-045147 and EEBB-14-09094 mobility grant for L.G.C’s research stay at the University of Cantabria. |
URI: | http://hdl.handle.net/10045/54036 |
ISSN: | 2311-5629 |
DOI: | 10.3390/c2020010 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.3390/c2020010 |
Aparece en las colecciones: | INV - LEQA - Artículos de Revistas |
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