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Single-compartment hydrogen peroxide fuel cells with poly(3,4-ethylenedioxythiophene) cathodes
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering. Graz Univ Technol, Austria.
Redox Me AB, Sweden.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-0280-8017
2018 (English)In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 54, no 84, p. 11873-11876Article in journal (Refereed) Published
Abstract [en]

Single-compartment hydrogen peroxide fuel cells have recently emerged as a promising energy conversion platform since H2O2 is a high energy-density liquid that functions as both fuel and oxidizer. Finding suitable electrocatalysts is challenging since most metallic electrodes also catalyze the disproportionation reaction of H2O2 into H2O and O-2, representing a significant loss mechanism in peroxide fuel cells. Herein we demonstrate that the conducting polymer poly(3,4-ethylenedioxythiophene), PEDOT, is a versatile electrocatalyst for peroxide fuel cells without generating losses due to disproportionation. We find that PEDOT is a cathodic catalyst for reduction of peroxide to water, performing at a level on par with the best reported inorganic catalysts. Using PEDOT as the cathode and nickel as the anode material, open circuit potentials in the range of 0.5-0.6 V are possible, with power densities of 0.20-0.30 mW cm(-2). We provide evidence to understand mechanistically how PEDOT functions as a catalyst for hydrogen peroxide reduction to water. The result of our efforts is a scalable hydrogen peroxide fuel cell cathode, which serves to demonstrate also the capabilities of organic semiconducting materials as electrocatalysts.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2018. Vol. 54, no 84, p. 11873-11876
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URN: urn:nbn:se:liu:diva-152610DOI: 10.1039/c8cc06802jISI: 000447807500003PubMedID: 30280179OAI: oai:DiVA.org:liu-152610DiVA, id: diva2:1262114
Note

Funding Agencies|Vinnova; Knut and Alice Wallenberg Foundation; Erasmus+ scholarship program of the European Commission

Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2018-12-03

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