Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying
Abstract The increasing demand for green hydrogen is driving the development of efficient and durable electrocatalysts for the hydrogen evolution reaction (HER). Nickel‐molybdenum (NiMo) alloys are among the best HER electrocatalysts in alkaline electrolytes, and here we report a scalable solution p...
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| Format: | Article |
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Wiley-VCH
2025-01-01
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| Series: | ChemistryOpen |
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| Online Access: | https://doi.org/10.1002/open.202400069 |
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| author | Xiuyu Wu Alexis Piñeiro‐García Mouna Rafei Alice Kuzhikandathil Esdras J. Canto‐Aguilar Eduardo Gracia‐Espino |
| author_facet | Xiuyu Wu Alexis Piñeiro‐García Mouna Rafei Alice Kuzhikandathil Esdras J. Canto‐Aguilar Eduardo Gracia‐Espino |
| author_sort | Xiuyu Wu |
| collection | DOAJ |
| description | Abstract The increasing demand for green hydrogen is driving the development of efficient and durable electrocatalysts for the hydrogen evolution reaction (HER). Nickel‐molybdenum (NiMo) alloys are among the best HER electrocatalysts in alkaline electrolytes, and here we report a scalable solution precursor plasma spraying (SPPS) process to produce the highly active Ni4Mo electrocatalysts directly onto metallic substrates. The NiMo coating coated onto inexpensive Ni mesh revealed an excellent HER performance with an overpotential of only 26 mV at −10 mA cm−2 with a Tafel slope of 55 mV dec−1. Excellent operational stability with minimum changes in overpotential were also observed even after extensive 60 hour high‐current stability test. In addition, we investigate the influence of different substrates over the catalytic performance and operational stability. We also proposed that a slow, but consistent, dissolution of Mo is the primary degradation mechanism of NiMo‐based coatings. This unique SPPS approach enables the scalable production of exceptional NiMo electrocatalysts with remarkable activity and durability, positioning them as ideal cathode materials for practical applications in alkaline water electrolysers. |
| format | Article |
| id | doaj-art-a68bb264b18f4ad2a2e5239a8537f8ea |
| institution | Kabale University |
| issn | 2191-1363 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemistryOpen |
| spelling | doaj-art-a68bb264b18f4ad2a2e5239a8537f8ea2025-01-11T07:54:10ZengWiley-VCHChemistryOpen2191-13632025-01-01141n/an/a10.1002/open.202400069Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma SprayingXiuyu Wu0Alexis Piñeiro‐García1Mouna Rafei2Alice Kuzhikandathil3Esdras J. Canto‐Aguilar4Eduardo Gracia‐Espino5Department of Physics Umeå University SE-901 87 Umeå SwedenDepartment of Physics Umeå University SE-901 87 Umeå SwedenDepartment of Physics Umeå University SE-901 87 Umeå SwedenDepartment of Physics Umeå University SE-901 87 Umeå SwedenDepartment of Physics Umeå University SE-901 87 Umeå SwedenDepartment of Physics Umeå University SE-901 87 Umeå SwedenAbstract The increasing demand for green hydrogen is driving the development of efficient and durable electrocatalysts for the hydrogen evolution reaction (HER). Nickel‐molybdenum (NiMo) alloys are among the best HER electrocatalysts in alkaline electrolytes, and here we report a scalable solution precursor plasma spraying (SPPS) process to produce the highly active Ni4Mo electrocatalysts directly onto metallic substrates. The NiMo coating coated onto inexpensive Ni mesh revealed an excellent HER performance with an overpotential of only 26 mV at −10 mA cm−2 with a Tafel slope of 55 mV dec−1. Excellent operational stability with minimum changes in overpotential were also observed even after extensive 60 hour high‐current stability test. In addition, we investigate the influence of different substrates over the catalytic performance and operational stability. We also proposed that a slow, but consistent, dissolution of Mo is the primary degradation mechanism of NiMo‐based coatings. This unique SPPS approach enables the scalable production of exceptional NiMo electrocatalysts with remarkable activity and durability, positioning them as ideal cathode materials for practical applications in alkaline water electrolysers.https://doi.org/10.1002/open.202400069HydrogenNickel-molybdenumElectrochemistryPlasma spraying |
| spellingShingle | Xiuyu Wu Alexis Piñeiro‐García Mouna Rafei Alice Kuzhikandathil Esdras J. Canto‐Aguilar Eduardo Gracia‐Espino Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying ChemistryOpen Hydrogen Nickel-molybdenum Electrochemistry Plasma spraying |
| title | Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying |
| title_full | Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying |
| title_fullStr | Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying |
| title_full_unstemmed | Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying |
| title_short | Highly Active and Durable Nanostructured Nickel‐Molybdenum Coatings as Hydrogen Electrocatalysts via Solution Precursor Plasma Spraying |
| title_sort | highly active and durable nanostructured nickel molybdenum coatings as hydrogen electrocatalysts via solution precursor plasma spraying |
| topic | Hydrogen Nickel-molybdenum Electrochemistry Plasma spraying |
| url | https://doi.org/10.1002/open.202400069 |
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