Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine

Structural engineering is an effective methodology for the tailoring of the quantities of active sites in nanostructured materials for fuel cell applications. In the present study, Co nanoparticles were incorporated into the network of 3D nitrogen-doped carbon tubes (Co@NCNTs) that were obtained via...

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Autores principales:	Hui Wang, Qing Dong, Lu Lei, Shan Ji, Palanisamy Kannan, Palaniappan Subramanian, Amar Prasad Yadav
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Co nanoparticles N-doped carbon nanotubes hydrazine electro-oxidation fuel cell Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/03ac90f79e524f84ac1f2627df8ac4a4
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spelling	oai:doaj.org-article:03ac90f79e524f84ac1f2627df8ac4a42021-11-25T18:30:24ZCo Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine10.3390/nano111128572079-4991https://doaj.org/article/03ac90f79e524f84ac1f2627df8ac4a42021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2857https://doaj.org/toc/2079-4991Structural engineering is an effective methodology for the tailoring of the quantities of active sites in nanostructured materials for fuel cell applications. In the present study, Co nanoparticles were incorporated into the network of 3D nitrogen-doped carbon tubes (Co@NCNTs) that were obtained via the molten-salt synthetic approach at 800 °C. Morphological representation reveals that the Co@NCNTs are encompassed with Co nanoparticles on the surface of the mesoporous walls of the carbon nanotubes, which offers a significant active surface area for electrochemical reactions. The CoNPs/NCNTs-1 (treated with CaCl<sub>2</sub>) nanomaterial was used as a potential candidate for the electro-oxidation of hydrazine, which improved the response of hydrazine (~8.5 mA) in 1.0 M NaOH, as compared with CoNPs/NCNTs-2 (treated without CaCl<sub>2</sub>), NCNTs, and the unmodified GCE. Furthermore, the integration of Co helps to improve the conductivity and promote the lower onset electro-oxidation potential (−0.58 V) toward the hydrazine electro-oxidation reaction. In particular, the CoNPs/NCNTs-1 catalysts showed significant catalytic activity and stability performances i.e., the i-t curves showed notable stability when compared with their initial current responses, even after 10 days, which indicates the significant durability of the catalyst materials. This work could present a new approach for the design of efficient electrode materials, which can be used as a favorable candidate for the electro-oxidation of liquid fuels in fuel cell applications.Hui WangQing DongLu LeiShan JiPalanisamy KannanPalaniappan SubramanianAmar Prasad YadavMDPI AGarticleCo nanoparticlesN-doped carbon nanotubeshydrazineelectro-oxidationfuel cellChemistryQD1-999ENNanomaterials, Vol 11, Iss 2857, p 2857 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Co nanoparticles N-doped carbon nanotubes hydrazine electro-oxidation fuel cell Chemistry QD1-999
spellingShingle	Co nanoparticles N-doped carbon nanotubes hydrazine electro-oxidation fuel cell Chemistry QD1-999 Hui Wang Qing Dong Lu Lei Shan Ji Palanisamy Kannan Palaniappan Subramanian Amar Prasad Yadav Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
description	Structural engineering is an effective methodology for the tailoring of the quantities of active sites in nanostructured materials for fuel cell applications. In the present study, Co nanoparticles were incorporated into the network of 3D nitrogen-doped carbon tubes (Co@NCNTs) that were obtained via the molten-salt synthetic approach at 800 °C. Morphological representation reveals that the Co@NCNTs are encompassed with Co nanoparticles on the surface of the mesoporous walls of the carbon nanotubes, which offers a significant active surface area for electrochemical reactions. The CoNPs/NCNTs-1 (treated with CaCl<sub>2</sub>) nanomaterial was used as a potential candidate for the electro-oxidation of hydrazine, which improved the response of hydrazine (~8.5 mA) in 1.0 M NaOH, as compared with CoNPs/NCNTs-2 (treated without CaCl<sub>2</sub>), NCNTs, and the unmodified GCE. Furthermore, the integration of Co helps to improve the conductivity and promote the lower onset electro-oxidation potential (−0.58 V) toward the hydrazine electro-oxidation reaction. In particular, the CoNPs/NCNTs-1 catalysts showed significant catalytic activity and stability performances i.e., the i-t curves showed notable stability when compared with their initial current responses, even after 10 days, which indicates the significant durability of the catalyst materials. This work could present a new approach for the design of efficient electrode materials, which can be used as a favorable candidate for the electro-oxidation of liquid fuels in fuel cell applications.
format	article
author	Hui Wang Qing Dong Lu Lei Shan Ji Palanisamy Kannan Palaniappan Subramanian Amar Prasad Yadav
author_facet	Hui Wang Qing Dong Lu Lei Shan Ji Palanisamy Kannan Palaniappan Subramanian Amar Prasad Yadav
author_sort	Hui Wang
title	Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
title_short	Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
title_full	Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
title_fullStr	Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
title_full_unstemmed	Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine
title_sort	co nanoparticle-encapsulated nitrogen-doped carbon nanotubes as an efficient and robust catalyst for electro-oxidation of hydrazine
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/03ac90f79e524f84ac1f2627df8ac4a4
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Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of Hydrazine

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