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Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions

Electrochemical oxygen reduction reaction (ORR) is an important energy-related process requiring alternative catalysts to expensive platinum-based ones. Although recently some advancements in carbon catalysts have been reported, there is still a lack of understanding which surface features might enh...

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Autores principales: de Falco, Giacomo, Florent, Marc, Jagiello, Jacek, Cheng, Yongqiang, Daemen, Luke L., Ramirez-Cuesta, Anibal J., Bandosz, Teresa J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7941033/
https://www.ncbi.nlm.nih.gov/pubmed/33733074
http://dx.doi.org/10.1016/j.isci.2021.102216
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author de Falco, Giacomo
Florent, Marc
Jagiello, Jacek
Cheng, Yongqiang
Daemen, Luke L.
Ramirez-Cuesta, Anibal J.
Bandosz, Teresa J.
author_facet de Falco, Giacomo
Florent, Marc
Jagiello, Jacek
Cheng, Yongqiang
Daemen, Luke L.
Ramirez-Cuesta, Anibal J.
Bandosz, Teresa J.
author_sort de Falco, Giacomo
collection PubMed
description Electrochemical oxygen reduction reaction (ORR) is an important energy-related process requiring alternative catalysts to expensive platinum-based ones. Although recently some advancements in carbon catalysts have been reported, there is still a lack of understanding which surface features might enhance their efficiency for ORR. Through a detailed study of oxygen adsorption on carbon molecular sieves and using inelastic neutron scattering, we demonstrated here that the extent of oxygen adsorption/interactions with surface is an important parameter affecting ORR. It was found that both the strength of O(2) physical adsorption in small pores and its specific interactions with surface ether functionalities in the proximity of pores positively influence the ORR efficiency. We have shown that ultramicropores and hydrophobic surface rich in ether-based groups and/or electrons enhance ORR on carbon electrocatalysts and the performance parameters are similar to those measured on Pt/C with the number of electron transfer equal to 4.
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spelling pubmed-79410332021-03-16 Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions de Falco, Giacomo Florent, Marc Jagiello, Jacek Cheng, Yongqiang Daemen, Luke L. Ramirez-Cuesta, Anibal J. Bandosz, Teresa J. iScience Article Electrochemical oxygen reduction reaction (ORR) is an important energy-related process requiring alternative catalysts to expensive platinum-based ones. Although recently some advancements in carbon catalysts have been reported, there is still a lack of understanding which surface features might enhance their efficiency for ORR. Through a detailed study of oxygen adsorption on carbon molecular sieves and using inelastic neutron scattering, we demonstrated here that the extent of oxygen adsorption/interactions with surface is an important parameter affecting ORR. It was found that both the strength of O(2) physical adsorption in small pores and its specific interactions with surface ether functionalities in the proximity of pores positively influence the ORR efficiency. We have shown that ultramicropores and hydrophobic surface rich in ether-based groups and/or electrons enhance ORR on carbon electrocatalysts and the performance parameters are similar to those measured on Pt/C with the number of electron transfer equal to 4. Elsevier 2021-02-23 /pmc/articles/PMC7941033/ /pubmed/33733074 http://dx.doi.org/10.1016/j.isci.2021.102216 Text en © 2021 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
de Falco, Giacomo
Florent, Marc
Jagiello, Jacek
Cheng, Yongqiang
Daemen, Luke L.
Ramirez-Cuesta, Anibal J.
Bandosz, Teresa J.
Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title_full Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title_fullStr Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title_full_unstemmed Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title_short Alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
title_sort alternative view of oxygen reduction on porous carbon electrocatalysts: the substance of complex oxygen-surface interactions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7941033/
https://www.ncbi.nlm.nih.gov/pubmed/33733074
http://dx.doi.org/10.1016/j.isci.2021.102216
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