Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting
This study employed an electrodeposition approach to synthesize multiphasic CuSx and FeSx on nickel foam (NF) for application in saline water splitting. This multiphasic electrocatalyst exhibits a cauliflower morphology and develops a porous fused-type morphology upon partial oxidation. The NF/CuSx/...
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2025
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| author | Mottakin M. Sukor Su'ait M. Selvanathan V. Ibrahim M.A. Abdullah H. Akhtaruzzaman M. |
| author2 | 57195305487 |
| author_facet | 57195305487 Mottakin M. Sukor Su'ait M. Selvanathan V. Ibrahim M.A. Abdullah H. Akhtaruzzaman M. |
| author_sort | Mottakin M. |
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| content_provider | Universiti Tenaga Nasional |
| content_source | UNITEN Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | This study employed an electrodeposition approach to synthesize multiphasic CuSx and FeSx on nickel foam (NF) for application in saline water splitting. This multiphasic electrocatalyst exhibits a cauliflower morphology and develops a porous fused-type morphology upon partial oxidation. The NF/CuSx/FeSx electrode with partial oxidation exhibits the lowest overpotential of 181 mV at 10 mA/cm2 and a Tafel slope of 163 mV/decade for the oxygen evolution reaction (OER). The overpotential of 73 mV at 10 mA/cm2 and a Tafel slope of 165 mV/decade were found for the hydrogen evolution reaction (HER). A charge transfer coefficient value of ?0.5 in OER and HER indicates that the rate-determining step depends on the surface adsorption of reaction species. The presence of an unpaired electron during partial oxidation can create additional active sites and reduce solution resistance (Rs). This can improve the interaction between reactants and intermediates, improving OER and HER performance. NF/CuSx/FeSx composites demonstrated robust stability using real seawater splitting over 80 hours in HER with negligible degradation. However, catalyst breakdown in OER after 10 hours due to prolonged exposure to higher potentials, resulting in oxidative corrosion. This study offers a multiphasic electrode design using the electrodeposition technique to produce green hydrogen energy through seawater splitting. ? 2024 Elsevier B.V. |
| format | Article |
| id | my.uniten.dspace-36343 |
| institution | Universiti Tenaga Nasional |
| publishDate | 2025 |
| publisher | Elsevier Ltd |
| record_format | dspace |
| spelling | my.uniten.dspace-363432025-03-03T15:42:00Z Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting Mottakin M. Sukor Su'ait M. Selvanathan V. Ibrahim M.A. Abdullah H. Akhtaruzzaman M. 57195305487 57223117728 57160057200 55843508000 26025061200 57195441001 Charge transfer Copper compounds Corrosion Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxidation Oxygen Seawater Surface reactions Hydrogen evolution reaction Hydrogen evolution reactions Metal sulfides Nickel foam Overpotential Oxygen evolution reaction Partial oxidations Transitional metal sulphide Transitional metals Water splitting Sulfur compounds This study employed an electrodeposition approach to synthesize multiphasic CuSx and FeSx on nickel foam (NF) for application in saline water splitting. This multiphasic electrocatalyst exhibits a cauliflower morphology and develops a porous fused-type morphology upon partial oxidation. The NF/CuSx/FeSx electrode with partial oxidation exhibits the lowest overpotential of 181 mV at 10 mA/cm2 and a Tafel slope of 163 mV/decade for the oxygen evolution reaction (OER). The overpotential of 73 mV at 10 mA/cm2 and a Tafel slope of 165 mV/decade were found for the hydrogen evolution reaction (HER). A charge transfer coefficient value of ?0.5 in OER and HER indicates that the rate-determining step depends on the surface adsorption of reaction species. The presence of an unpaired electron during partial oxidation can create additional active sites and reduce solution resistance (Rs). This can improve the interaction between reactants and intermediates, improving OER and HER performance. NF/CuSx/FeSx composites demonstrated robust stability using real seawater splitting over 80 hours in HER with negligible degradation. However, catalyst breakdown in OER after 10 hours due to prolonged exposure to higher potentials, resulting in oxidative corrosion. This study offers a multiphasic electrode design using the electrodeposition technique to produce green hydrogen energy through seawater splitting. ? 2024 Elsevier B.V. Final 2025-03-03T07:42:00Z 2025-03-03T07:42:00Z 2024 Article 10.1016/j.jallcom.2024.175351 2-s2.0-85197587964 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197587964&doi=10.1016%2fj.jallcom.2024.175351&partnerID=40&md5=56ef8a006f250796856a0cb502688d14 https://irepository.uniten.edu.my/handle/123456789/36343 1002 175351 Elsevier Ltd Scopus |
| spellingShingle | Charge transfer Copper compounds Corrosion Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxidation Oxygen Seawater Surface reactions Hydrogen evolution reaction Hydrogen evolution reactions Metal sulfides Nickel foam Overpotential Oxygen evolution reaction Partial oxidations Transitional metal sulphide Transitional metals Water splitting Sulfur compounds Mottakin M. Sukor Su'ait M. Selvanathan V. Ibrahim M.A. Abdullah H. Akhtaruzzaman M. Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title | Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title_full | Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title_fullStr | Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title_full_unstemmed | Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title_short | Integrating multiphasic CuSx/FeSx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| title_sort | integrating multiphasic cusx/fesx nanostructured electrocatalyst for enhanced oxygen and hydrogen evolution reactions in saline water splitting |
| topic | Charge transfer Copper compounds Corrosion Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxidation Oxygen Seawater Surface reactions Hydrogen evolution reaction Hydrogen evolution reactions Metal sulfides Nickel foam Overpotential Oxygen evolution reaction Partial oxidations Transitional metal sulphide Transitional metals Water splitting Sulfur compounds |
| url_provider | http://dspace.uniten.edu.my/ |