Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution
Layered double hydroxides (LDHs) have gained vast importance as an electrocatalyst for water electrolysis to produce carbon-neutral and clean hydrogen energy. In this work, we demonstrated the fabrication of nano-flake-like NiMn LDH thin film electrodes onto porous membrane-like Ni-foam by using a s...
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MDPI AG
2023-08-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/9/748 |
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| author | Verjesh Kumar Magotra Arjun Magotra Sawanta S. Mali Hee C. Jeon Tae W. Kang Amol S. Salunke Chang Kook Hong Nabeen K. Shrestha Hyunsik Im Akbar I. Inamdar |
| author_facet | Verjesh Kumar Magotra Arjun Magotra Sawanta S. Mali Hee C. Jeon Tae W. Kang Amol S. Salunke Chang Kook Hong Nabeen K. Shrestha Hyunsik Im Akbar I. Inamdar |
| author_sort | Verjesh Kumar Magotra |
| collection | DOAJ |
| description | Layered double hydroxides (LDHs) have gained vast importance as an electrocatalyst for water electrolysis to produce carbon-neutral and clean hydrogen energy. In this work, we demonstrated the fabrication of nano-flake-like NiMn LDH thin film electrodes onto porous membrane-like Ni-foam by using a simple and cost-effective electrodeposition method for oxygen evolution reaction (OER). Various Ni<sub>1-x</sub>Mn<sub>x</sub> LDH (where x = 0.15, 0.25, 0.35, 0.50 and 0.75) thin film electrodes are utilized to achieve the optimal catalyst for an efficient and sustainable OER process. The various composition-dependent surface morphologies and porous-membrane-like structure provided the high electrochemical surface area along with abundant active sites facilitating the OER. The optimized catalyst referred to as Ni<sub>0.65</sub>Mn<sub>0.35</sub> showed excellent OER properties with an ultralow overpotential of 253 mV at a current density of 50 mAcm<sup>−2</sup>, which outperforms other state-of-the art catalysts reported in the literature. The relatively low Tafel slope of 130 mV dec<sup>−1</sup> indicates faster and more favorable reaction kinetics for OER. Moreover, Ni<sub>0.65</sub>Mn<sub>0.35</sub> exhibits excellent durability over continuous operation of 20 h, indicating the great sustainability of the catalyst in an alkaline medium. This study provides knowledge for the fabrication and optimization of the OER catalyst electrode for water electrolysis. |
| first_indexed | 2024-03-10T22:28:42Z |
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| language | English |
| last_indexed | 2024-03-10T22:28:42Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
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| series | Membranes |
| spelling | doaj.art-1cbdddc6522244fc849b24c675d0f2a02023-11-19T11:53:55ZengMDPI AGMembranes2077-03752023-08-0113974810.3390/membranes13090748Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen EvolutionVerjesh Kumar Magotra0Arjun Magotra1Sawanta S. Mali2Hee C. Jeon3Tae W. Kang4Amol S. Salunke5Chang Kook Hong6Nabeen K. Shrestha7Hyunsik Im8Akbar I. Inamdar9Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul 13557, Republic of KoreaDepartment of Computer Science and Engineering, Faculty of Engineering and Technology, Jain (Deemed-to-be University), Bengaluru 562112, IndiaPolymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500757, Republic of KoreaQuantum-Functional Semiconductor Research Center, Dongguk University, Seoul 13557, Republic of KoreaQuantum-Functional Semiconductor Research Center, Dongguk University, Seoul 13557, Republic of KoreaDivision of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of KoreaPolymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500757, Republic of KoreaDivision of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of KoreaDivision of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of KoreaDivision of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of KoreaLayered double hydroxides (LDHs) have gained vast importance as an electrocatalyst for water electrolysis to produce carbon-neutral and clean hydrogen energy. In this work, we demonstrated the fabrication of nano-flake-like NiMn LDH thin film electrodes onto porous membrane-like Ni-foam by using a simple and cost-effective electrodeposition method for oxygen evolution reaction (OER). Various Ni<sub>1-x</sub>Mn<sub>x</sub> LDH (where x = 0.15, 0.25, 0.35, 0.50 and 0.75) thin film electrodes are utilized to achieve the optimal catalyst for an efficient and sustainable OER process. The various composition-dependent surface morphologies and porous-membrane-like structure provided the high electrochemical surface area along with abundant active sites facilitating the OER. The optimized catalyst referred to as Ni<sub>0.65</sub>Mn<sub>0.35</sub> showed excellent OER properties with an ultralow overpotential of 253 mV at a current density of 50 mAcm<sup>−2</sup>, which outperforms other state-of-the art catalysts reported in the literature. The relatively low Tafel slope of 130 mV dec<sup>−1</sup> indicates faster and more favorable reaction kinetics for OER. Moreover, Ni<sub>0.65</sub>Mn<sub>0.35</sub> exhibits excellent durability over continuous operation of 20 h, indicating the great sustainability of the catalyst in an alkaline medium. This study provides knowledge for the fabrication and optimization of the OER catalyst electrode for water electrolysis.https://www.mdpi.com/2077-0375/13/9/748electrocatalysiswater splittingNiMn LDHsheterostructure catalysisoxygen evolution reaction |
| spellingShingle | Verjesh Kumar Magotra Arjun Magotra Sawanta S. Mali Hee C. Jeon Tae W. Kang Amol S. Salunke Chang Kook Hong Nabeen K. Shrestha Hyunsik Im Akbar I. Inamdar Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution Membranes electrocatalysis water splitting NiMn LDHs heterostructure catalysis oxygen evolution reaction |
| title | Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution |
| title_full | Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution |
| title_fullStr | Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution |
| title_full_unstemmed | Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution |
| title_short | Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution |
| title_sort | nanoflake nimn layered double hydroxide coated on porous membrane like ni foam for sustainable and efficient electrocatalytic oxygen evolution |
| topic | electrocatalysis water splitting NiMn LDHs heterostructure catalysis oxygen evolution reaction |
| url | https://www.mdpi.com/2077-0375/13/9/748 |
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