Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction
Over the past decade, layered double hydroxides (LDH) have been the subject of extensive investigations owing to their remarkable water splitting catalytic activity. Stability and porosity are several of the features of LDH which help them to serve as efficient oxygen evolution reaction (OER) cataly...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/11/1819 |
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| author | Rafia Nimal Rashida Yahya Afzal Shah Muhammad Abdullah Khan Muhammad Abid Zia Iltaf Shah |
| author_facet | Rafia Nimal Rashida Yahya Afzal Shah Muhammad Abdullah Khan Muhammad Abid Zia Iltaf Shah |
| author_sort | Rafia Nimal |
| collection | DOAJ |
| description | Over the past decade, layered double hydroxides (LDH) have been the subject of extensive investigations owing to their remarkable water splitting catalytic activity. Stability and porosity are several of the features of LDH which help them to serve as efficient oxygen evolution reaction (OER) catalysts. Based on these considerations, we synthesized NiCo(OH)<sub>2</sub> LDH and probed its OER electrocatalytic performance. The synthesized catalyst was subjected to X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy for structural analysis and investigation of its surface morphology, surface composition, and oxidation states. The LDH-NiCo(OH)<sub>2</sub> was anchored over the FTO surface and the fabricated electrode was found to exhibit a much lower OER onset potential of 265 mV, a much higher current density of 300 mAcm<sup>−</sup><sup>2</sup> and a smaller Tafel slope of 41 mVdec<sup>−1</sup>. Moreover, the designed catalyst was found to be stable up to 2500 repeated voltametric scans. These figures of merit regarding the structure and performance of the designed LDH are expected to provide useful insights into the fundamental understanding of the OER catalysts and their mechanisms of action, thus enabling the more rational design of cost effective and highly efficient electrocatalysts for use in water splitting. |
| first_indexed | 2024-03-10T01:02:42Z |
| format | Article |
| id | doaj.art-92b4d3d1702e428cb0b6b9e5522cf73e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T01:02:42Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-92b4d3d1702e428cb0b6b9e5522cf73e2023-11-23T14:32:46ZengMDPI AGNanomaterials2079-49912022-05-011211181910.3390/nano12111819Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation ReactionRafia Nimal0Rashida Yahya1Afzal Shah2Muhammad Abdullah Khan3Muhammad Abid Zia4Iltaf Shah5Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, PakistanRenewable Energy Advancement Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of Chemistry, University of Education Lahore, Attock Campus, Attock 43600, PakistanDepartment of Chemistry, College of Science, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab EmiratesOver the past decade, layered double hydroxides (LDH) have been the subject of extensive investigations owing to their remarkable water splitting catalytic activity. Stability and porosity are several of the features of LDH which help them to serve as efficient oxygen evolution reaction (OER) catalysts. Based on these considerations, we synthesized NiCo(OH)<sub>2</sub> LDH and probed its OER electrocatalytic performance. The synthesized catalyst was subjected to X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy for structural analysis and investigation of its surface morphology, surface composition, and oxidation states. The LDH-NiCo(OH)<sub>2</sub> was anchored over the FTO surface and the fabricated electrode was found to exhibit a much lower OER onset potential of 265 mV, a much higher current density of 300 mAcm<sup>−</sup><sup>2</sup> and a smaller Tafel slope of 41 mVdec<sup>−1</sup>. Moreover, the designed catalyst was found to be stable up to 2500 repeated voltametric scans. These figures of merit regarding the structure and performance of the designed LDH are expected to provide useful insights into the fundamental understanding of the OER catalysts and their mechanisms of action, thus enabling the more rational design of cost effective and highly efficient electrocatalysts for use in water splitting.https://www.mdpi.com/2079-4991/12/11/1819NiCo(OH)<sub>2</sub> layered double hydroxideselectrocatalysisoxygen evolution reactiononset potentialcurrent densitystability |
| spellingShingle | Rafia Nimal Rashida Yahya Afzal Shah Muhammad Abdullah Khan Muhammad Abid Zia Iltaf Shah Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction Nanomaterials NiCo(OH)<sub>2</sub> layered double hydroxides electrocatalysis oxygen evolution reaction onset potential current density stability |
| title | Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction |
| title_full | Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction |
| title_fullStr | Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction |
| title_full_unstemmed | Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction |
| title_short | Development of Electrolyzer Using NiCo(OH)<sub>2</sub> Layered Double Hydroxide Catalyst for Efficient Water Oxidation Reaction |
| title_sort | development of electrolyzer using nico oh sub 2 sub layered double hydroxide catalyst for efficient water oxidation reaction |
| topic | NiCo(OH)<sub>2</sub> layered double hydroxides electrocatalysis oxygen evolution reaction onset potential current density stability |
| url | https://www.mdpi.com/2079-4991/12/11/1819 |
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