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High rates of oxygen reduction over a vapor phase-polymerized PEDOT electrode
journal contribution
posted on 2008-08-01, 00:00 authored by B Winther-Jensen, O Winther-Jensen, Maria ForsythMaria Forsyth, D MacFarlaneThe air electrode, which reduces oxygen (O2), is a critical component in energy generation and storage applications such as fuel cells and metal/air batteries. The highest current densities are achieved with platinum (Pt), but in addition to its cost and scarcity, Pt particles in composite electrodes tend to be inactivated by contact with carbon monoxide (CO) or by agglomeration. We describe an air electrode based on a porous material coated with poly(3,4-ethylenedioxythiophene) (PEDOT), which acts as an O2 reduction catalyst. Continuous operation for 1500 hours was demonstrated without material degradation or deterioration in performance. O2 conversion rates were comparable with those of Pt-catalyzed electrodes of the same geometry, and the electrode was not sensitive to CO. Operation was demonstrated as an air electrode and as a dissolved O2 electrode in aqueous solution.
History
Journal
ScienceVolume
321Issue
5889Pagination
671 - 674Publisher
American Association for the Advancement of ScienceLocation
Washington, DCPublisher DOI
ISSN
0036-8075eISSN
1095-9203Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2008, American Association for the Advancement of ScienceUsage metrics
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