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Improved methanol barrier property of Nafion hybrid membrane by incorporating nanofibrous interlayer self-immobilized with high level of phosphotungstic acid

Abouzari-lotf, Ebrahim Abouzari and Nasef, Mohamed Mahmoud and Ghassemi, Hossein and Zakeri, Masoumeh and Ahmad, Arshad and Abdollahi, Yadollah (2015) Improved methanol barrier property of Nafion hybrid membrane by incorporating nanofibrous interlayer self-immobilized with high level of phosphotungstic acid. ACS Applied Materials and Interfaces, 7 (31). pp. 17008-17015. ISSN 1944-8244

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Official URL: http://dx.doi.org/10.1021/acsami.5b02268

Abstract

High level of phosphotungstic acid (PWA) was self-immobilized on electrospun nylon nanofiberous sheet to fabricate highly selective methanol barrier layer for sandwich structured proton conducting membranes. Simple tuning for the assembly conditions of central layer and thickness of outer Nafion layers allowed obtaining different composite membranes with superior methanol barrier properties (namely, P = 3.59 × 10-8 cm2 s-1) coupled with proton conductivities reaching 58.6 mS cm-1 at 30 °C. Comparable activation energy for proton transport and more than 20 times higher selectivity than Nafion 115 confirm the effectiveness of the central layer and resulting membranes for application in direct methanol fuel cells (DMFCs). When tested in DMFC single cell, the performance of hybrid membrane was far better than Nafion 115 especially at higher methanol concentrations

Item Type:Article
Uncontrolled Keywords:proton transfer, self-immobilized materials
Subjects:T Technology > T Technology (General)
T Technology > TP Chemical technology
Divisions:Malaysia-Japan International Institute of Technology
ID Code:55681
Deposited By: Fazli Masari
Deposited On:27 Sep 2016 01:05
Last Modified:21 Aug 2017 03:26

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