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Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification

[Image: see text] Non-precious metal catalysts show great promise to replace the state-of-the-art Pt-based catalysts for catalyzing the oxygen reduction reaction (ORR), while their catalytic activity still needs to be greatly improved before their broad-based application. Here, we report a facile ap...

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Autores principales: Zhang, Gui-Rong, Yong, Cong, Shen, Liu-Liu, Yu, Hui, Brunnengräber, Kai, Imhof, Timo, Mei, Donghai, Etzold, Bastian J. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10119856/
https://www.ncbi.nlm.nih.gov/pubmed/37024101
http://dx.doi.org/10.1021/acsami.2c21441
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author Zhang, Gui-Rong
Yong, Cong
Shen, Liu-Liu
Yu, Hui
Brunnengräber, Kai
Imhof, Timo
Mei, Donghai
Etzold, Bastian J. M.
author_facet Zhang, Gui-Rong
Yong, Cong
Shen, Liu-Liu
Yu, Hui
Brunnengräber, Kai
Imhof, Timo
Mei, Donghai
Etzold, Bastian J. M.
author_sort Zhang, Gui-Rong
collection PubMed
description [Image: see text] Non-precious metal catalysts show great promise to replace the state-of-the-art Pt-based catalysts for catalyzing the oxygen reduction reaction (ORR), while their catalytic activity still needs to be greatly improved before their broad-based application. Here, we report a facile approach to improving the performance of zeolitic imidazolate framework-derived carbon (ZDC) toward the ORR by incorporating a small amount of ionic liquid (IL). The IL would preferentially fill the micropores of ZDC and greatly enhance the utilization of the active sites within the micropores, which are initially not accessible due to insufficient surface wetting. It is also disclosed that the ORR activity in terms of kinetic current at 0.85 V depends on the loading amount of the IL, and the maximum activity is obtained at a mass ratio of IL to ZDC at 1.2. The optimum stems from the counterbalance between the enhanced utilization of the active sites within the micropores and the retarded diffusion of the reactants within the IL phase due to its high viscosity.
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spelling pubmed-101198562023-04-22 Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification Zhang, Gui-Rong Yong, Cong Shen, Liu-Liu Yu, Hui Brunnengräber, Kai Imhof, Timo Mei, Donghai Etzold, Bastian J. M. ACS Appl Mater Interfaces [Image: see text] Non-precious metal catalysts show great promise to replace the state-of-the-art Pt-based catalysts for catalyzing the oxygen reduction reaction (ORR), while their catalytic activity still needs to be greatly improved before their broad-based application. Here, we report a facile approach to improving the performance of zeolitic imidazolate framework-derived carbon (ZDC) toward the ORR by incorporating a small amount of ionic liquid (IL). The IL would preferentially fill the micropores of ZDC and greatly enhance the utilization of the active sites within the micropores, which are initially not accessible due to insufficient surface wetting. It is also disclosed that the ORR activity in terms of kinetic current at 0.85 V depends on the loading amount of the IL, and the maximum activity is obtained at a mass ratio of IL to ZDC at 1.2. The optimum stems from the counterbalance between the enhanced utilization of the active sites within the micropores and the retarded diffusion of the reactants within the IL phase due to its high viscosity. American Chemical Society 2023-04-06 /pmc/articles/PMC10119856/ /pubmed/37024101 http://dx.doi.org/10.1021/acsami.2c21441 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Zhang, Gui-Rong
Yong, Cong
Shen, Liu-Liu
Yu, Hui
Brunnengräber, Kai
Imhof, Timo
Mei, Donghai
Etzold, Bastian J. M.
Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title_full Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title_fullStr Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title_full_unstemmed Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title_short Increasing Accessible Active Site Density of Non-Precious Metal Oxygen Reduction Reaction Catalysts through Ionic Liquid Modification
title_sort increasing accessible active site density of non-precious metal oxygen reduction reaction catalysts through ionic liquid modification
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10119856/
https://www.ncbi.nlm.nih.gov/pubmed/37024101
http://dx.doi.org/10.1021/acsami.2c21441
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