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Oxygen-induced doping on reduced PEDOT

The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) has shown promise as air electrode in renewable energy technologies like metal–air batteries and fuel cells. PEDOT is based on atomic elements of high abundance and is synthesized at low temperature from solution. The mechanism of oxyge...

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Autores principales: Mitraka, E., Jafari, M. J., Vagin, M., Liu, X., Fahlman, M., Ederth, T., Berggren, M., Jonsson, M. P., Crispin, X.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5436492/
https://www.ncbi.nlm.nih.gov/pubmed/28580144
http://dx.doi.org/10.1039/c6ta10521a
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author Mitraka, E.
Jafari, M. J.
Vagin, M.
Liu, X.
Fahlman, M.
Ederth, T.
Berggren, M.
Jonsson, M. P.
Crispin, X.
author_facet Mitraka, E.
Jafari, M. J.
Vagin, M.
Liu, X.
Fahlman, M.
Ederth, T.
Berggren, M.
Jonsson, M. P.
Crispin, X.
author_sort Mitraka, E.
collection PubMed
description The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) has shown promise as air electrode in renewable energy technologies like metal–air batteries and fuel cells. PEDOT is based on atomic elements of high abundance and is synthesized at low temperature from solution. The mechanism of oxygen reduction reaction (ORR) over chemically polymerized PEDOT:Cl still remains controversial with eventual role of transition metal impurities. However, regardless of the mechanistic route, we here demonstrate yet another key active role of PEDOT in the ORR mechanism. Our study demonstrates the decoupling of conductivity (intrinsic property) from electrocatalysis (as an extrinsic phenomenon) yielding the evidence of doping of the polymer by oxygen during ORR. Hence, the PEDOT electrode is electrochemically reduced (undoped) in the voltage range of ORR regime, but O(2) keeps it conducting; ensuring PEDOT to act as an electrode for the ORR. The interaction of oxygen with the polymer electrode is investigated with a battery of spectroscopic techniques.
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spelling pubmed-54364922017-06-02 Oxygen-induced doping on reduced PEDOT Mitraka, E. Jafari, M. J. Vagin, M. Liu, X. Fahlman, M. Ederth, T. Berggren, M. Jonsson, M. P. Crispin, X. J Mater Chem A Mater Chemistry The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) has shown promise as air electrode in renewable energy technologies like metal–air batteries and fuel cells. PEDOT is based on atomic elements of high abundance and is synthesized at low temperature from solution. The mechanism of oxygen reduction reaction (ORR) over chemically polymerized PEDOT:Cl still remains controversial with eventual role of transition metal impurities. However, regardless of the mechanistic route, we here demonstrate yet another key active role of PEDOT in the ORR mechanism. Our study demonstrates the decoupling of conductivity (intrinsic property) from electrocatalysis (as an extrinsic phenomenon) yielding the evidence of doping of the polymer by oxygen during ORR. Hence, the PEDOT electrode is electrochemically reduced (undoped) in the voltage range of ORR regime, but O(2) keeps it conducting; ensuring PEDOT to act as an electrode for the ORR. The interaction of oxygen with the polymer electrode is investigated with a battery of spectroscopic techniques. Royal Society of Chemistry 2017-03-07 2017-02-06 /pmc/articles/PMC5436492/ /pubmed/28580144 http://dx.doi.org/10.1039/c6ta10521a Text en This journal is © The Royal Society of Chemistry 2017 https://creativecommons.org/licenses/by-nc/3.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/ (https://creativecommons.org/licenses/by-nc/3.0/) ) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Chemistry
Mitraka, E.
Jafari, M. J.
Vagin, M.
Liu, X.
Fahlman, M.
Ederth, T.
Berggren, M.
Jonsson, M. P.
Crispin, X.
Oxygen-induced doping on reduced PEDOT
title Oxygen-induced doping on reduced PEDOT
title_full Oxygen-induced doping on reduced PEDOT
title_fullStr Oxygen-induced doping on reduced PEDOT
title_full_unstemmed Oxygen-induced doping on reduced PEDOT
title_short Oxygen-induced doping on reduced PEDOT
title_sort oxygen-induced doping on reduced pedot
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5436492/
https://www.ncbi.nlm.nih.gov/pubmed/28580144
http://dx.doi.org/10.1039/c6ta10521a
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