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

descriptionPublicationkeyboard_double_arrow_right Article , Journal , Other literature type 30 Jul 2015 Italy Publisher:MDPI AGJournal:Energies, volume 8, pages 7,805-7,817 (eissn: 1996-1073,

Authors: Stassi Alessandro; Gatto Irene; Saccà Ada; Baglio Vincenzo; Aricò Antonino S;

doi: 10.3390/en8087805

handle: 20.500.14243/295155

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

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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.

Country

Italy

Related Organizations

National Research Council
Italy
Institute for Advanced Energy Technologies
Italy

Keywords

Technology, Polymer electrolyte membrane fuel cell (PEMFC), Oxygen reduction, polymer electrolyte membrane fuel cell (PEMFC), polymer electrolyte membrane fuel cell (PEMFC); heteropoly acids; Cs 0.5 H 0.5 PW 12 O 40 ; intermediate temperature; oxygen reduction, Cs<inf>0.5</inf>H<inf>0.5</inf>PW<inf>12</inf>O<inf>40</inf>, Cs0.5H0.5PW12O40, Cs, T, Cs0.5H0.5PW12O40, heteropoly acids, intermediate temperature, oxygen reduction, Intermediate temperature, Heteropoly acids, jel: jel:Q40, jel: jel:Q, jel: jel:Q43, jel: jel:Q42, jel: jel:Q41, jel: jel:Q48, jel: jel:Q47, jel: jel:Q49, jel: jel:Q0, jel: jel:Q4

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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average