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Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors
The development of non−Pt or carbon−based catalysts for anion exchange membrane fuel cells (AEMFCs) requires identification of the active sites of the catalyst. Since not only metals but also carbon materials exhibit oxygen reduction reaction (ORR) activity in alkaline conditions, the contribution o...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657715/ https://www.ncbi.nlm.nih.gov/pubmed/36364577 http://dx.doi.org/10.3390/nano12213800 |
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author | Kim, Yunjin Min, Jiho Ko, Keonwoo Sravani, Bathinapatla Chougule, Sourabh S. Choi, Yoonseong Choi, Hyeonwoo Hong, SeoYeong Jung, Namgee |
author_facet | Kim, Yunjin Min, Jiho Ko, Keonwoo Sravani, Bathinapatla Chougule, Sourabh S. Choi, Yoonseong Choi, Hyeonwoo Hong, SeoYeong Jung, Namgee |
author_sort | Kim, Yunjin |
collection | PubMed |
description | The development of non−Pt or carbon−based catalysts for anion exchange membrane fuel cells (AEMFCs) requires identification of the active sites of the catalyst. Since not only metals but also carbon materials exhibit oxygen reduction reaction (ORR) activity in alkaline conditions, the contribution of carbon-based materials to ORR performance should also be thoroughly analyzed. However, the conventional CN(−) poisoning experiments, which are mainly used to explain the main active site of M−N−C catalysts, are limited to only qualitative discussions, having the potential to make fundamental errors. Here, we report a modified electrochemical analysis to quantitatively investigate the contribution of the metal and carbon active sites to ORR currents at a fixed potential by sequentially performing chronoamperometry with two reaction inhibitors, CN(−) and benzyl trimethylammonium (BTMA(+)). As a result, we discover how to quantify the individual contributions of two active sites (Pt nanoparticles and carbon support) of carbon−supported Pt (Pt/C) nanoparticles as a model catalyst. This study is expected to provide important clues for the active site analysis of carbon-supported non−Pt catalysts, such as M−N−C catalysts composed of heterogeneous elements. |
format | Online Article Text |
id | pubmed-9657715 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96577152022-11-15 Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors Kim, Yunjin Min, Jiho Ko, Keonwoo Sravani, Bathinapatla Chougule, Sourabh S. Choi, Yoonseong Choi, Hyeonwoo Hong, SeoYeong Jung, Namgee Nanomaterials (Basel) Article The development of non−Pt or carbon−based catalysts for anion exchange membrane fuel cells (AEMFCs) requires identification of the active sites of the catalyst. Since not only metals but also carbon materials exhibit oxygen reduction reaction (ORR) activity in alkaline conditions, the contribution of carbon-based materials to ORR performance should also be thoroughly analyzed. However, the conventional CN(−) poisoning experiments, which are mainly used to explain the main active site of M−N−C catalysts, are limited to only qualitative discussions, having the potential to make fundamental errors. Here, we report a modified electrochemical analysis to quantitatively investigate the contribution of the metal and carbon active sites to ORR currents at a fixed potential by sequentially performing chronoamperometry with two reaction inhibitors, CN(−) and benzyl trimethylammonium (BTMA(+)). As a result, we discover how to quantify the individual contributions of two active sites (Pt nanoparticles and carbon support) of carbon−supported Pt (Pt/C) nanoparticles as a model catalyst. This study is expected to provide important clues for the active site analysis of carbon-supported non−Pt catalysts, such as M−N−C catalysts composed of heterogeneous elements. MDPI 2022-10-28 /pmc/articles/PMC9657715/ /pubmed/36364577 http://dx.doi.org/10.3390/nano12213800 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kim, Yunjin Min, Jiho Ko, Keonwoo Sravani, Bathinapatla Chougule, Sourabh S. Choi, Yoonseong Choi, Hyeonwoo Hong, SeoYeong Jung, Namgee Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title | Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title_full | Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title_fullStr | Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title_full_unstemmed | Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title_short | Activity Quantification of Fuel Cell Catalysts via Sequential Poisoning by Multiple Reaction Inhibitors |
title_sort | activity quantification of fuel cell catalysts via sequential poisoning by multiple reaction inhibitors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657715/ https://www.ncbi.nlm.nih.gov/pubmed/36364577 http://dx.doi.org/10.3390/nano12213800 |
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