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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MDPI AG
2021-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/11/2857 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:12:29Z |
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| id | doaj.art-03ac90f79e524f84ac1f2627df8ac4a4 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T05:12:29Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-03ac90f79e524f84ac1f2627df8ac4a42023-11-23T00:39:29ZengMDPI AGNanomaterials2079-49912021-10-011111285710.3390/nano11112857Co Nanoparticle-Encapsulated Nitrogen-Doped Carbon Nanotubes as an Efficient and Robust Catalyst for Electro-Oxidation of HydrazineHui Wang0Qing Dong1Lu Lei2Shan Ji3Palanisamy Kannan4Palaniappan Subramanian5Amar Prasad Yadav6College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaNew Technologies–Research Center, University of West Bohemia, 30100 Plzeň, Czech RepublicCentral Department of Chemistry, Tribhuvan University, Kirtipur 44613, NepalStructural 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.https://www.mdpi.com/2079-4991/11/11/2857Co nanoparticlesN-doped carbon nanotubeshydrazineelectro-oxidationfuel cell |
| spellingShingle | 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 Nanomaterials Co nanoparticles N-doped carbon nanotubes hydrazine electro-oxidation fuel cell |
| title | 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_short | 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 |
| topic | Co nanoparticles N-doped carbon nanotubes hydrazine electro-oxidation fuel cell |
| url | https://www.mdpi.com/2079-4991/11/11/2857 |
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