Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting
Development of seawater splitting is essential for the sustainable hydrogen energy production via electrocatalysis. In this study, a facile electrodeposition technique is adopted to design a copper sulfide/cobalt sulfide biphasic composition on nickel foam as bifunctional electrocatalyst for oxygen...
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my.uniten.dspace-340422024-10-14T11:17:45Z Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting Mottakin M. Selvanathan V. Razali S.A. Islam M.A. Almohamadi H. Alharthi N.H. Yoshimura S. Akhtaruzzaman M. 57195305487 57160057200 57225826234 59320173600 57196063818 55942800300 7201663524 57195441001 Alkaline seawater Biphasic design Electrocatalyst Electrodeposition Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Catalyst activity Chlorine compounds Copper compounds Electrocatalysis Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxygen Seawater Sulfur compounds Urea Alkaline seawater Alkalines Bifunctional electrocatalysts Biphasic design Hydrogen evolution reaction Hydrogen evolution reactions Overpotential Oxygen evolution reaction Splittings ]+ catalyst Cost effectiveness Development of seawater splitting is essential for the sustainable hydrogen energy production via electrocatalysis. In this study, a facile electrodeposition technique is adopted to design a copper sulfide/cobalt sulfide biphasic composition on nickel foam as bifunctional electrocatalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In saline water, bi-phasic CoSx/CuSx@NF catalyst provides the minimal overpotential of 230 mV at 10 mA cm?2 and 390 mV at 100 mA cm?2 for OER. The electrode exhibits the Tafel slope of 133.4 mV dec?1. CoSx/CuSx@NF catalyst also provides the minimal overpotential of 113 mV at 10 mA cm?2 for HER. From FESEM analysis, it was deduced that the interconnected nanosheet and nanoflower structure in CoSx/CuSx@NF provides high surface area and lowered interfacial resistance for improving OER and HER activity. The catalyst shows excellent multifunctional activity in urea oxidation reaction (UOR). The electrodes showed good stability in alkaline, chloride solutions by retaining its activity up to 24 h for OER and 60 hrs for HER. This study demonstrates a highly stable, reproducible, cost-effective electrodeposited biphasic catalyst for OER, HER, and UOR. � 2023 Final 2024-10-14T03:17:45Z 2024-10-14T03:17:45Z 2023 Article 10.1016/j.electacta.2023.142861 2-s2.0-85164993338 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164993338&doi=10.1016%2fj.electacta.2023.142861&partnerID=40&md5=0c7ef85d039d0cba80d76867a0ff1e0d https://irepository.uniten.edu.my/handle/123456789/34042 463 142861 Elsevier Ltd Scopus |
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Alkaline seawater Biphasic design Electrocatalyst Electrodeposition Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Catalyst activity Chlorine compounds Copper compounds Electrocatalysis Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxygen Seawater Sulfur compounds Urea Alkaline seawater Alkalines Bifunctional electrocatalysts Biphasic design Hydrogen evolution reaction Hydrogen evolution reactions Overpotential Oxygen evolution reaction Splittings ]+ catalyst Cost effectiveness |
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Alkaline seawater Biphasic design Electrocatalyst Electrodeposition Hydrogen evolution reaction (HER) Oxygen evolution reaction (OER) Catalyst activity Chlorine compounds Copper compounds Electrocatalysis Electrocatalysts Electrodeposition Electrodes Hydrogen production Oxygen Seawater Sulfur compounds Urea Alkaline seawater Alkalines Bifunctional electrocatalysts Biphasic design Hydrogen evolution reaction Hydrogen evolution reactions Overpotential Oxygen evolution reaction Splittings ]+ catalyst Cost effectiveness Mottakin M. Selvanathan V. Razali S.A. Islam M.A. Almohamadi H. Alharthi N.H. Yoshimura S. Akhtaruzzaman M. Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
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Development of seawater splitting is essential for the sustainable hydrogen energy production via electrocatalysis. In this study, a facile electrodeposition technique is adopted to design a copper sulfide/cobalt sulfide biphasic composition on nickel foam as bifunctional electrocatalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In saline water, bi-phasic CoSx/CuSx@NF catalyst provides the minimal overpotential of 230 mV at 10 mA cm?2 and 390 mV at 100 mA cm?2 for OER. The electrode exhibits the Tafel slope of 133.4 mV dec?1. CoSx/CuSx@NF catalyst also provides the minimal overpotential of 113 mV at 10 mA cm?2 for HER. From FESEM analysis, it was deduced that the interconnected nanosheet and nanoflower structure in CoSx/CuSx@NF provides high surface area and lowered interfacial resistance for improving OER and HER activity. The catalyst shows excellent multifunctional activity in urea oxidation reaction (UOR). The electrodes showed good stability in alkaline, chloride solutions by retaining its activity up to 24 h for OER and 60 hrs for HER. This study demonstrates a highly stable, reproducible, cost-effective electrodeposited biphasic catalyst for OER, HER, and UOR. � 2023 |
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57195305487 |
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57195305487 Mottakin M. Selvanathan V. Razali S.A. Islam M.A. Almohamadi H. Alharthi N.H. Yoshimura S. Akhtaruzzaman M. |
format |
Article |
author |
Mottakin M. Selvanathan V. Razali S.A. Islam M.A. Almohamadi H. Alharthi N.H. Yoshimura S. Akhtaruzzaman M. |
author_sort |
Mottakin M. |
title |
Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
title_short |
Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
title_full |
Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
title_fullStr |
Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
title_full_unstemmed |
Facile electrodeposition of biphasic CuSx/CoSx nanostructures as bifunctional electrocatalysts for seawater splitting |
title_sort |
facile electrodeposition of biphasic cusx/cosx nanostructures as bifunctional electrocatalysts for seawater splitting |
publisher |
Elsevier Ltd |
publishDate |
2024 |
_version_ |
1814061038559035392 |
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13.209306 |