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Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction

Increasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H(2)-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-weighted sub-4 nm PtCo/...

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Autores principales: Xiang, Linlin, Hu, Yunqin, Zhao, Yanyan, Cao, Sufeng, Kuai, Long
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458021/
https://www.ncbi.nlm.nih.gov/pubmed/37630951
http://dx.doi.org/10.3390/nano13162367
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author Xiang, Linlin
Hu, Yunqin
Zhao, Yanyan
Cao, Sufeng
Kuai, Long
author_facet Xiang, Linlin
Hu, Yunqin
Zhao, Yanyan
Cao, Sufeng
Kuai, Long
author_sort Xiang, Linlin
collection PubMed
description Increasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H(2)-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-weighted sub-4 nm PtCo/C alloy catalyst via a simple incipient wetness impregnation method. By carefully optimizing the synthetic conditions such as Pt/Co ratios, calcination temperature, and time, the size of supported PtCo alloy nanoparticles is successfully controlled below 4 nm, and a high electrochemical surface area of 93.8 m(2)/g is achieved, which is 3.4 times that of commercial PtCo/C-TKK catalysts. Demonstrated by electrochemical oxygen reduction reactions, PtCo/C alloy catalysts present an enhanced mass activity of 0.465 A/mg at 0.9 V vs. RHE, which is 2.0 times that of the PtCo/C-TKK catalyst. Therefore, the developed PtCo/C alloy catalyst has the potential to be a highly practical catalyst for H(2)–air fuel cells.
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spelling pubmed-104580212023-08-27 Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction Xiang, Linlin Hu, Yunqin Zhao, Yanyan Cao, Sufeng Kuai, Long Nanomaterials (Basel) Article Increasing the loading density of nanoparticles on carbon support is essential for making Pt-alloy/C catalysts practical in H(2)-air fuel cells. The challenge lies in increasing the loading while suppressing the sintering of Pt-alloy nanoparticles. This work presents a 40% Pt-weighted sub-4 nm PtCo/C alloy catalyst via a simple incipient wetness impregnation method. By carefully optimizing the synthetic conditions such as Pt/Co ratios, calcination temperature, and time, the size of supported PtCo alloy nanoparticles is successfully controlled below 4 nm, and a high electrochemical surface area of 93.8 m(2)/g is achieved, which is 3.4 times that of commercial PtCo/C-TKK catalysts. Demonstrated by electrochemical oxygen reduction reactions, PtCo/C alloy catalysts present an enhanced mass activity of 0.465 A/mg at 0.9 V vs. RHE, which is 2.0 times that of the PtCo/C-TKK catalyst. Therefore, the developed PtCo/C alloy catalyst has the potential to be a highly practical catalyst for H(2)–air fuel cells. MDPI 2023-08-18 /pmc/articles/PMC10458021/ /pubmed/37630951 http://dx.doi.org/10.3390/nano13162367 Text en © 2023 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
Xiang, Linlin
Hu, Yunqin
Zhao, Yanyan
Cao, Sufeng
Kuai, Long
Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title_full Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title_fullStr Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title_full_unstemmed Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title_short Carbon-Supported High-Loading Sub-4 nm PtCo Alloy Electrocatalysts for Superior Oxygen Reduction Reaction
title_sort carbon-supported high-loading sub-4 nm ptco alloy electrocatalysts for superior oxygen reduction reaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458021/
https://www.ncbi.nlm.nih.gov/pubmed/37630951
http://dx.doi.org/10.3390/nano13162367
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