Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction
Tungsten carbide-based nano-catalysts (Ni-WC, Co-WC and NiCo-WC) and molybdenum carbide-based nano-catalysts (Ni-MoC, Co-MoC and NiCo-MoC) were synthesised using a carbothermal reduction method. X-ray diffraction, scanning electron microscopy coupled with electron dispersive spectroscopy, x-ray phot...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | International Journal of Sustainable Energy |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/14786451.2023.2176700 |
| _version_ | 1797680264654094336 |
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| author | Busisiwe Petunia Mabuea Elizabeth Erasmus Hendrik Christoffel Swart |
| author_facet | Busisiwe Petunia Mabuea Elizabeth Erasmus Hendrik Christoffel Swart |
| author_sort | Busisiwe Petunia Mabuea |
| collection | DOAJ |
| description | Tungsten carbide-based nano-catalysts (Ni-WC, Co-WC and NiCo-WC) and molybdenum carbide-based nano-catalysts (Ni-MoC, Co-MoC and NiCo-MoC) were synthesised using a carbothermal reduction method. X-ray diffraction, scanning electron microscopy coupled with electron dispersive spectroscopy, x-ray photoelectron spectroscopy and cyclic voltammetry were used to evaluate the prepared electrocatalysts. The cyclic voltammetry results showed that Ni-WC coated electrode displayed the best hydrogen evolution reaction catalytic activity with the lowest overpotential of 1.421 V at a current density of 10 mA cm−2, and a Tafel slope of 135 mV dec−1 which is marginally lower than the benchmark Pt/C coated electrodes. Ni-MoC and Co-MoC coated electrocatalysts also produced current more effectively with a change in potential as compared to the Pt/C coated electrode. The durability test showed Co-WC, NiCo-WC and Ni-MoC coated electrodes to have high stability within a wide range of current densities. |
| first_indexed | 2024-03-11T23:27:12Z |
| format | Article |
| id | doaj.art-ffb9a2b6c24a48778a694c432348695a |
| institution | Directory Open Access Journal |
| issn | 1478-6451 1478-646X |
| language | English |
| last_indexed | 2024-03-11T23:27:12Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | International Journal of Sustainable Energy |
| spelling | doaj.art-ffb9a2b6c24a48778a694c432348695a2023-09-20T10:45:15ZengTaylor & Francis GroupInternational Journal of Sustainable Energy1478-64511478-646X2023-12-014219110210.1080/14786451.2023.21767002176700Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reactionBusisiwe Petunia Mabuea0Elizabeth Erasmus1Hendrik Christoffel Swart2University of the Free StateUniversity of the Free StateUniversity of the Free StateTungsten carbide-based nano-catalysts (Ni-WC, Co-WC and NiCo-WC) and molybdenum carbide-based nano-catalysts (Ni-MoC, Co-MoC and NiCo-MoC) were synthesised using a carbothermal reduction method. X-ray diffraction, scanning electron microscopy coupled with electron dispersive spectroscopy, x-ray photoelectron spectroscopy and cyclic voltammetry were used to evaluate the prepared electrocatalysts. The cyclic voltammetry results showed that Ni-WC coated electrode displayed the best hydrogen evolution reaction catalytic activity with the lowest overpotential of 1.421 V at a current density of 10 mA cm−2, and a Tafel slope of 135 mV dec−1 which is marginally lower than the benchmark Pt/C coated electrodes. Ni-MoC and Co-MoC coated electrocatalysts also produced current more effectively with a change in potential as compared to the Pt/C coated electrode. The durability test showed Co-WC, NiCo-WC and Ni-MoC coated electrodes to have high stability within a wide range of current densities.http://dx.doi.org/10.1080/14786451.2023.2176700electrocatalystscarbidescvhydrogen evolution reaction |
| spellingShingle | Busisiwe Petunia Mabuea Elizabeth Erasmus Hendrik Christoffel Swart Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction International Journal of Sustainable Energy electrocatalysts carbides cv hydrogen evolution reaction |
| title | Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| title_full | Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| title_fullStr | Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| title_full_unstemmed | Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| title_short | Molybdenum-Tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| title_sort | molybdenum tungsten carbides based electrocatalysts for hydrogen evolution reaction |
| topic | electrocatalysts carbides cv hydrogen evolution reaction |
| url | http://dx.doi.org/10.1080/14786451.2023.2176700 |
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