Abstract

The air electrode, which reduces oxygen (O 2 ), 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 O 2 reduction catalyst. Continuous operation for 1500 hours was demonstrated without material degradation or deterioration in performance. O 2 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 O 2 electrode in aqueous solution.

Keywords

ElectrodePEDOT:PSSMaterials scienceChemical engineeringPlatinumReversible hydrogen electrodeCatalysisAqueous solutionCarbon monoxideWorking electrodeElectrochemistryInorganic chemistryComposite materialChemistryPolymerOrganic chemistry

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Publication Info

Year
2008
Type
article
Volume
321
Issue
5889
Pages
671-674
Citations
507
Access
Closed

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Bjørn Winther‐Jensen, Orawan Winther‐Jensen, Maria Forsyth et al. (2008). High Rates of Oxygen Reduction over a Vapor Phase–Polymerized PEDOT Electrode. Science , 321 (5889) , 671-674. https://doi.org/10.1126/science.1159267

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DOI
10.1126/science.1159267