Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters
This study explores the development of Co-W alloy coatings as efficient electrode materials for the hydrogen evolution reaction (HER), offering new insights into their performance. Using a specially formulated electrolyte bath with glycerol as an additive, Co-W alloy coatings were deposited on coppe...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Arab Journal of Basic and Applied Sciences |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/25765299.2025.2460857 |
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| author | A. Chitharanjan Hegde Meghana K. Navada Ganesha Aroor Akshatha R. Shetty |
| author_facet | A. Chitharanjan Hegde Meghana K. Navada Ganesha Aroor Akshatha R. Shetty |
| author_sort | A. Chitharanjan Hegde |
| collection | DOAJ |
| description | This study explores the development of Co-W alloy coatings as efficient electrode materials for the hydrogen evolution reaction (HER), offering new insights into their performance. Using a specially formulated electrolyte bath with glycerol as an additive, Co-W alloy coatings were deposited on copper under different [Co2+]/[WO42−] molar ratios. Their electrocatalytic efficiency was evaluated in 1 M KOH through cyclic voltammetry (CV), chronopotentiometry (CP), and hydrogen gas measurements using a custom glass device. The results showed that the combination of Co and W in the coatings significantly enhances performance, as confirmed by SEM, XRD, and EDS analyses. Potentiodynamic polarization studies further explained the HER mechanisms. This work introduces a unique bath composition and demonstrates how optimizing the alloy composition can improve HER activity, paving the way for better electrocatalysts. The study identified that the Co-W coating prepared using a 0.35 M solution at a current density of 1 Adm2 demonstrated the highest electrocatalytic efficiency. This performance was attributed to the tungsten content of approximately 30 wt% and the maximum hydrogen evolution observed under these optimized conditions. The hydrogen evolution reaction (HER) in Co-W alloys follows the Volmer-Heyrovsky mechanism, characterized by the rapid evolution of hydrogen. |
| format | Article |
| id | doaj-art-371b340a8197418a82c6d7f50ad3030a |
| institution | Kabale University |
| issn | 2576-5299 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Arab Journal of Basic and Applied Sciences |
| spelling | doaj-art-371b340a8197418a82c6d7f50ad3030a2025-02-04T10:28:31ZengTaylor & Francis GroupArab Journal of Basic and Applied Sciences2576-52992025-12-01321304110.1080/25765299.2025.2460857Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parametersA. Chitharanjan Hegde0Meghana K. Navada1Ganesha Aroor2Akshatha R. Shetty3Electrochemistry Research Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Srinivasnagar, IndiaDepartment of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, IndiaDepartment of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, IndiaDepartment of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, IndiaThis study explores the development of Co-W alloy coatings as efficient electrode materials for the hydrogen evolution reaction (HER), offering new insights into their performance. Using a specially formulated electrolyte bath with glycerol as an additive, Co-W alloy coatings were deposited on copper under different [Co2+]/[WO42−] molar ratios. Their electrocatalytic efficiency was evaluated in 1 M KOH through cyclic voltammetry (CV), chronopotentiometry (CP), and hydrogen gas measurements using a custom glass device. The results showed that the combination of Co and W in the coatings significantly enhances performance, as confirmed by SEM, XRD, and EDS analyses. Potentiodynamic polarization studies further explained the HER mechanisms. This work introduces a unique bath composition and demonstrates how optimizing the alloy composition can improve HER activity, paving the way for better electrocatalysts. The study identified that the Co-W coating prepared using a 0.35 M solution at a current density of 1 Adm2 demonstrated the highest electrocatalytic efficiency. This performance was attributed to the tungsten content of approximately 30 wt% and the maximum hydrogen evolution observed under these optimized conditions. The hydrogen evolution reaction (HER) in Co-W alloys follows the Volmer-Heyrovsky mechanism, characterized by the rapid evolution of hydrogen.https://www.tandfonline.com/doi/10.1080/25765299.2025.2460857Co-W alloyelectrocatalytic studyelectrodepositionmolar ratio |
| spellingShingle | A. Chitharanjan Hegde Meghana K. Navada Ganesha Aroor Akshatha R. Shetty Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters Arab Journal of Basic and Applied Sciences Co-W alloy electrocatalytic study electrodeposition molar ratio |
| title | Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters |
| title_full | Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters |
| title_fullStr | Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters |
| title_full_unstemmed | Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters |
| title_short | Synthesis and characterization of Co-W alloy coatings for enhanced hydrogen evolution: effects of bath composition and deposition parameters |
| title_sort | synthesis and characterization of co w alloy coatings for enhanced hydrogen evolution effects of bath composition and deposition parameters |
| topic | Co-W alloy electrocatalytic study electrodeposition molar ratio |
| url | https://www.tandfonline.com/doi/10.1080/25765299.2025.2460857 |
| work_keys_str_mv | AT achitharanjanhegde synthesisandcharacterizationofcowalloycoatingsforenhancedhydrogenevolutioneffectsofbathcompositionanddepositionparameters AT meghanaknavada synthesisandcharacterizationofcowalloycoatingsforenhancedhydrogenevolutioneffectsofbathcompositionanddepositionparameters AT ganeshaaroor synthesisandcharacterizationofcowalloycoatingsforenhancedhydrogenevolutioneffectsofbathcompositionanddepositionparameters AT akshatharshetty synthesisandcharacterizationofcowalloycoatingsforenhancedhydrogenevolutioneffectsofbathcompositionanddepositionparameters |