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Superacidity in Nafion/MOF Hybrid Membranes Retains Water at Low Humidity to Enhance Proton Conduction for Fuel Cells

Patel, HA; Mansor, N; Gadipelli, S; Brett, DJL; Guo, Z; (2016) Superacidity in Nafion/MOF Hybrid Membranes Retains Water at Low Humidity to Enhance Proton Conduction for Fuel Cells. ACS APPLIED MATERIALS & INTERFACES , 8 (45) pp. 30687-30691. 10.1021/acsami.6b12240. Green open access

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Abstract

A hybrid membrane of superacid sulfated Zr–MOF (SZM) and Nafion shows much superior performance to Nafion, particularly for fuel cell operating under low humidity. The Brønsted acidic sites in SZM networks retain an ample amount of water which facilitated proton conduction under low humidity. The water retention properties of Nafion–SZM hybrid membranes with 1 wt % loading of SZM increased at 35% relative humidity and outperformed commercial unfilled Nafion membrane. The proton conductivity increases by 23% for Nafion–SZM hybrid compared to unfilled Nafion membrane. The Nafion–SZM membrane also shows higher performance stability at 35% relative humidity than Nafion, as confirmed by close monitoring of the change of open circuit voltage for 24 h.

Type: Article
Title: Superacidity in Nafion/MOF Hybrid Membranes Retains Water at Low Humidity to Enhance Proton Conduction for Fuel Cells
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsami.6b12240
Publisher version: http://dx.doi.org/10.1021/acsami.6b12240
Language: English
Additional information: This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Keywords: Science & Technology, Technology, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Science & Technology - Other Topics, Materials Science, fuel cell, membrane, proton conduction, metal-organic frameworks, superacidity, METAL-ORGANIC FRAMEWORKS, CORE-SHELL NANOFILLER, SUPERPROTONIC CONDUCTIVITY, RELAXATIONS, INTERPLAY, MOF,
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1534839
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