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Energies 2015, 8(8), 7805-7817; doi:10.3390/en8087805

Enhancement of Oxygen Reduction and Mitigation of Ionomer Dry-Out Using Insoluble Heteropoly Acids in Intermediate Temperature Polymer-Electrolyte Membrane Fuel Cells

CNR-ITAE Institute of Advanced Energy Technologies "Nicola Giordano", Via Salita S. Lucia sopra Contesse 5, 98126 Messina, Italy
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Academic Editor: Vladimir Gurau
Received: 15 June 2015 / Revised: 17 July 2015 / Accepted: 24 July 2015 / Published: 30 July 2015
(This article belongs to the Special Issue Polymer Electrolyte Membrane Fuel Cells 2015)
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Abstract

The use of Cs0.5H0.5PW12O40 insoluble salt as a superacid promoter in the catalyst layer of a polymer electrolyte membrane fuel cell (PEMFC) has been investigated. An increase of performance has been recorded at intermediate temperatures (110–130 °C) and under low relative humidity (R.H.). The promoter appears to mitigate the ionomer dry-out effects in the catalytic layer and produces an increase of the extent of the catalyst-electrolyte interface as demonstrated by cyclic voltammetry analysis. These effects are also corroborated by a significant decrease of polarization resistance at intermediate temperatures. Such characteristics have been demonstrated for a conventional membrane-electrode assembly based on a Pt-Co alloy and a Nafion 115 membrane. View Full-Text
Keywords: polymer electrolyte membrane fuel cell (PEMFC); heteropoly acids; Cs0.5H0.5PW12O40; intermediate temperature; oxygen reduction polymer electrolyte membrane fuel cell (PEMFC); heteropoly acids; Cs0.5H0.5PW12O40; intermediate temperature; oxygen reduction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Stassi, A.; Gatto, I.; Saccà, A.; Baglio, V.; Aricò, A.S. Enhancement of Oxygen Reduction and Mitigation of Ionomer Dry-Out Using Insoluble Heteropoly Acids in Intermediate Temperature Polymer-Electrolyte Membrane Fuel Cells. Energies 2015, 8, 7805-7817.

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