Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction
In this study, the pristine MgO, MgO/CNT and Ni-MgO/CNT nanocomposites were processed using the impregnation and chemical vapor deposition methods and analyzed for hydrogen evolution reaction (HER) using the electrochemical water splitting process. Furthermore, the effect of nickel on the deposited...
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MDPI AG
2024-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/3/280 |
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| author | Panneerselvam Mohana Melkiyur Isacfranklin Rathinam Yuvakkumar Ganesan Ravi Lakshmanan Kungumadevi Sundaramoorthy Arunmetha Jun Hyun Han Sun Ig Hong |
| author_facet | Panneerselvam Mohana Melkiyur Isacfranklin Rathinam Yuvakkumar Ganesan Ravi Lakshmanan Kungumadevi Sundaramoorthy Arunmetha Jun Hyun Han Sun Ig Hong |
| author_sort | Panneerselvam Mohana |
| collection | DOAJ |
| description | In this study, the pristine MgO, MgO/CNT and Ni-MgO/CNT nanocomposites were processed using the impregnation and chemical vapor deposition methods and analyzed for hydrogen evolution reaction (HER) using the electrochemical water splitting process. Furthermore, the effect of nickel on the deposited carbon was systematically elaborated in this study. The highly conductive carbon nanotubes (CNTs) deposited on the metal surface of the Ni-MgO nanocomposite heterostructure provides a robust stability and superior electrocatalytic activity. The optimized Ni-MgO/CNT nanocomposite exhibited hierarchical, helical-shaped carbon nanotubes adorned on the surface of the Ni-MgO flakes, forming a hybrid metal–carbon network structure. The catalytic HER was carried out in a 1M alkaline KOH electrolyte, and the optimized Ni-MgO/CNT nanocomposite achieved a low (117 mV) overpotential value (ɳ) at 10 mA cm<sup>−2</sup> and needed a low (116 mV/dec) Tafel value, denotes the Volmer–Heyrovsky pathway. Also, the high electrochemical active surface area (ECSA) value of the Ni-MgO/CNT nanocomposite attained 515 cm<sup>2</sup>, which is favorable for the generation of abundant electroactive species, and the prepared electrocatalyst durability was also performed using a chronoamperometry test for the prolonged duration of 20 h at 10 mA cm<sup>−2</sup> and exhibited good stability, with a 72% retention. Hence, the obtained results demonstrate that the optimized Ni-MgO/CNT nanocomposite is a highly active and cost-effective electrocatalyst for hydrogen energy production. |
| first_indexed | 2024-03-08T03:51:37Z |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-08T03:51:37Z |
| publishDate | 2024-01-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-466f9c635e8540bc913dda5e220c02c12024-02-09T15:19:26ZengMDPI AGNanomaterials2079-49912024-01-0114328010.3390/nano14030280Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution ReactionPanneerselvam Mohana0Melkiyur Isacfranklin1Rathinam Yuvakkumar2Ganesan Ravi3Lakshmanan Kungumadevi4Sundaramoorthy Arunmetha5Jun Hyun Han6Sun Ig Hong7Department of Physics, Alagappa University, Karaikudi 630003, IndiaDepartment of Physics, Alagappa University, Karaikudi 630003, IndiaDepartment of Physics, Alagappa University, Karaikudi 630003, IndiaDepartment of Physics, Alagappa University, Karaikudi 630003, IndiaDepartment of Physics, Mother Terasa Women’s University, Kodaikanal 624101, IndiaDepartment of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Guntur 522502, IndiaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaIn this study, the pristine MgO, MgO/CNT and Ni-MgO/CNT nanocomposites were processed using the impregnation and chemical vapor deposition methods and analyzed for hydrogen evolution reaction (HER) using the electrochemical water splitting process. Furthermore, the effect of nickel on the deposited carbon was systematically elaborated in this study. The highly conductive carbon nanotubes (CNTs) deposited on the metal surface of the Ni-MgO nanocomposite heterostructure provides a robust stability and superior electrocatalytic activity. The optimized Ni-MgO/CNT nanocomposite exhibited hierarchical, helical-shaped carbon nanotubes adorned on the surface of the Ni-MgO flakes, forming a hybrid metal–carbon network structure. The catalytic HER was carried out in a 1M alkaline KOH electrolyte, and the optimized Ni-MgO/CNT nanocomposite achieved a low (117 mV) overpotential value (ɳ) at 10 mA cm<sup>−2</sup> and needed a low (116 mV/dec) Tafel value, denotes the Volmer–Heyrovsky pathway. Also, the high electrochemical active surface area (ECSA) value of the Ni-MgO/CNT nanocomposite attained 515 cm<sup>2</sup>, which is favorable for the generation of abundant electroactive species, and the prepared electrocatalyst durability was also performed using a chronoamperometry test for the prolonged duration of 20 h at 10 mA cm<sup>−2</sup> and exhibited good stability, with a 72% retention. Hence, the obtained results demonstrate that the optimized Ni-MgO/CNT nanocomposite is a highly active and cost-effective electrocatalyst for hydrogen energy production.https://www.mdpi.com/2079-4991/14/3/280water splittinghydrogen evolution reactionchemical vapor depositionoverpotentialhydrogen production |
| spellingShingle | Panneerselvam Mohana Melkiyur Isacfranklin Rathinam Yuvakkumar Ganesan Ravi Lakshmanan Kungumadevi Sundaramoorthy Arunmetha Jun Hyun Han Sun Ig Hong Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction Nanomaterials water splitting hydrogen evolution reaction chemical vapor deposition overpotential hydrogen production |
| title | Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction |
| title_full | Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction |
| title_fullStr | Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction |
| title_full_unstemmed | Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction |
| title_short | Facile Synthesis of Ni-MgO/CNT Nanocomposite for Hydrogen Evolution Reaction |
| title_sort | facile synthesis of ni mgo cnt nanocomposite for hydrogen evolution reaction |
| topic | water splitting hydrogen evolution reaction chemical vapor deposition overpotential hydrogen production |
| url | https://www.mdpi.com/2079-4991/14/3/280 |
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