PEM fuel cell cathode contamination in the presence of cobalt ion (Co2+)

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2010.05.031
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TypeArticle
Journal titleElectrochimica Acta
Volume55
IssueAugust 20
Pages58235830; # of pages: 8
SubjectPEM fuel cells; Cobalt ion contamination; Electrode kinetics; Mass transfer; Membrane conductivity
AbstractThis paper reports the effects of Co²⁺ contamination on PEM fuel cell performance as a function of Co²⁺ concentration and operating temperature. A significant drop in fuel cell voltage occurred when Co²⁺ was injected into the cathode air stream, and Co²⁺ contamination became more severe with decreasing temperature. To investigate in detail the mechanism of Co²⁺ poisoning, AC impedance was monitored before and during Co²⁺ injection, revealing that both charge transfer and mass transport related processes deteriorated significantly in the presence of Co²⁺, whereas membrane conductivity decreased to a lesser extent. Surface cyclic voltammetry and contact angle measurements further revealed changes in physical properties, such as active Pt surface area and hydrophilicity, furthering our understanding of the contamination process.
Publication date
LanguageEnglish
AffiliationNRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number16942911
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Record identifier48d4e463-bba7-4a85-9f34-70da50bf0db0
Record created2011-03-02
Record modified2016-05-09
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