Cargando…
Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination
Replacement of noble metals in catalysts for cathodic oxygen reduction reaction with transition metals mostly create active sites based on a composite of nitrogen-coordinated transition metal in close concert with non-nitrogen-coordinated carbon-embedded metal atom clusters. Here we report a non-pla...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4490352/ https://www.ncbi.nlm.nih.gov/pubmed/26059552 http://dx.doi.org/10.1038/ncomms8343 |
_version_ | 1782379486898028544 |
---|---|
author | Strickland, Kara Miner, Elise Jia, Qingying Tylus, Urszula Ramaswamy, Nagappan Liang, Wentao Sougrati, Moulay-Tahar Jaouen, Frédéric Mukerjee, Sanjeev |
author_facet | Strickland, Kara Miner, Elise Jia, Qingying Tylus, Urszula Ramaswamy, Nagappan Liang, Wentao Sougrati, Moulay-Tahar Jaouen, Frédéric Mukerjee, Sanjeev |
author_sort | Strickland, Kara |
collection | PubMed |
description | Replacement of noble metals in catalysts for cathodic oxygen reduction reaction with transition metals mostly create active sites based on a composite of nitrogen-coordinated transition metal in close concert with non-nitrogen-coordinated carbon-embedded metal atom clusters. Here we report a non-platinum group metal electrocatalyst with an active site devoid of any direct nitrogen coordination to iron that outperforms the benchmark platinum-based catalyst in alkaline media and is comparable to its best contemporaries in acidic media. In situ X-ray absorption spectroscopy in conjunction with ex situ microscopy clearly shows nitrided carbon fibres with embedded iron particles that are not directly involved in the oxygen reduction pathway. Instead, the reaction occurs primarily on the carbon–nitrogen structure in the outer skin of the nitrided carbon fibres. Implications include the potential of creating greater active site density and the potential elimination of any Fenton-type process involving exposed iron ions culminating in peroxide initiated free-radical formation. |
format | Online Article Text |
id | pubmed-4490352 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-44903522015-07-13 Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination Strickland, Kara Miner, Elise Jia, Qingying Tylus, Urszula Ramaswamy, Nagappan Liang, Wentao Sougrati, Moulay-Tahar Jaouen, Frédéric Mukerjee, Sanjeev Nat Commun Article Replacement of noble metals in catalysts for cathodic oxygen reduction reaction with transition metals mostly create active sites based on a composite of nitrogen-coordinated transition metal in close concert with non-nitrogen-coordinated carbon-embedded metal atom clusters. Here we report a non-platinum group metal electrocatalyst with an active site devoid of any direct nitrogen coordination to iron that outperforms the benchmark platinum-based catalyst in alkaline media and is comparable to its best contemporaries in acidic media. In situ X-ray absorption spectroscopy in conjunction with ex situ microscopy clearly shows nitrided carbon fibres with embedded iron particles that are not directly involved in the oxygen reduction pathway. Instead, the reaction occurs primarily on the carbon–nitrogen structure in the outer skin of the nitrided carbon fibres. Implications include the potential of creating greater active site density and the potential elimination of any Fenton-type process involving exposed iron ions culminating in peroxide initiated free-radical formation. Nature Pub. Group 2015-06-10 /pmc/articles/PMC4490352/ /pubmed/26059552 http://dx.doi.org/10.1038/ncomms8343 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Strickland, Kara Miner, Elise Jia, Qingying Tylus, Urszula Ramaswamy, Nagappan Liang, Wentao Sougrati, Moulay-Tahar Jaouen, Frédéric Mukerjee, Sanjeev Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title | Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title_full | Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title_fullStr | Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title_full_unstemmed | Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title_short | Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
title_sort | highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4490352/ https://www.ncbi.nlm.nih.gov/pubmed/26059552 http://dx.doi.org/10.1038/ncomms8343 |
work_keys_str_mv | AT stricklandkara highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT minerelise highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT jiaqingying highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT tylusurszula highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT ramaswamynagappan highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT liangwentao highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT sougratimoulaytahar highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT jaouenfrederic highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination AT mukerjeesanjeev highlyactiveoxygenreductionnonplatinumgroupmetalelectrocatalystwithoutdirectmetalnitrogencoordination |