Title

Decreasing Membrane Degradation Through Heteropolyacid Sub-Layers

Abstract

Heteropolyacids (HPAs) were adsorbed onto high surface area carbon, and incorporated in polymer electrolyte membrane fuel cells (PEMFCs) between the electrodes and membrane, forming "sub-layers." The addition of HPAs to these sub-layers significantly decreased membrane degradation in cells subjected to accelerated stress tests, as evidenced by a 50% reduction in fluoride emission rate (FER) and open circuit voltage (OCV) decay. Evidence of increased HPA and platinum concentration within the sub-layer indicates substantial HPA mobility. Modeling of the voltage profile through the sub-layer and membrane indicated that platinum precipitation was possible within the sub-layer, and that this is dependent on both the reduction potential and concentration of the HPA. © 2012 The Electrochemical Society.

Publication Date

4-12-2013

Publication Title

Journal of the Electrochemical Society

Volume

160

Issue

1

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1149/2.017302jes

Socpus ID

84875949014 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84875949014

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