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Bulk electronic tra...
Bulk electronic transport impacts on electron transfer at conducting polymer electrode-electrolyte interfaces.
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- Wijeratne, Kosala (author)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Ail, Ujwala, 1980- (author)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Brooke, Robert, 1989- (author)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Vagin, Mikhail, 1976- (author)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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- Liu, Xianjie, Ph.D. 1971- (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
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- Fahlman, Mats, 1967- (author)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
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- Crispin, Xavier, 1972- (author)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
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(creator_code:org_t)
- 2018-11-05
- 2018
- English.
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In: Proceedings of the National Academy of Sciences of the United States of America. - : National academy of sciences. - 0027-8424 .- 1091-6490. ; :7, s. 11899-11904
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https://www.pnas.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Electrochemistry is an old but still flourishing field of research due to the importance of the efficiency and kinetics of electrochemical reactions in industrial processes and (bio-)electrochemical devices. The heterogeneous electron transfer from an electrode to a reactant in the solution has been well studied for metal, semiconductor, metal oxide, and carbon electrodes. For those electrode materials, there is little correlation between the electronic transport within the electrode material and the electron transfer occurring at the interface between the electrode and the solution. Here, we investigate the heterogeneous electron transfer between a conducting polymer electrode and a redox couple in an electrolyte. As a benchmark system, we use poly(3,4-ethylenedioxythiophene) (PEDOT) and the Ferro/ferricyanide redox couple in an aqueous electrolyte. We discovered a strong correlation between the electronic transport within the PEDOT electrode and the rate of electron transfer to the organometallic molecules in solution. We attribute this to a percolation-based charge transport within the polymer electrode directly involved in the electron transfer. We show the impact of this finding by optimizing an electrochemical thermogalvanic cell that transforms a heat flux into electrical power. The power generated by the cell increased by four orders of magnitude on changing the morphology and conductivity of the polymer electrode. As all conducting polymers are recognized to have percolation transport, we believe that this is a general phenomenon for this family of conductors.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- conducting polymer
- electron transfer
- thermogalvanic cell
Publication and Content Type
- ref (subject category)
- art (subject category)
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Wijeratne, Kosal ...
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Ail, Ujwala, 198 ...
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Brooke, Robert, ...
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Vagin, Mikhail, ...
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Liu, Xianjie, Ph ...
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Fahlman, Mats, 1 ...
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Crispin, Xavier, ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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Proceedings of t ...
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Linköping University