Optimizing the electrocatalytic hydrogen production with vanadyl porphyrin impregnated on mesoporous SiO2 nanoparticles
Vanadyl octaethyl porphyrin (VOP) impregnated on SiO2 nanoparticles (SiO2@VOP) was investigated as an electrocatalyst for the water-splitting reaction for the cathodic hydrogen evolution reaction (HER). Multi-valent oxidation states of VO2+ center and multi-electron transfer properties of the porphy...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/402686 |
| Acceso en línea: | http://hdl.handle.net/10261/402686 https://api.elsevier.com/content/abstract/scopus_id/85215126131 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrocatalyst Electrode modification Hydrogen evolution reaction (HER) Vanadyl porphyrin |
| Sumario: | Vanadyl octaethyl porphyrin (VOP) impregnated on SiO2 nanoparticles (SiO2@VOP) was investigated as an electrocatalyst for the water-splitting reaction for the cathodic hydrogen evolution reaction (HER). Multi-valent oxidation states of VO2+ center and multi-electron transfer properties of the porphyrin ring made this complex a potential candidate for the electrocatalytic processes. Altering the electrode modification protocol by changing the amount of the VOP, carbon black (CB), and Nafion (Nf) binder on the modification influenced the active sites, thus consequently enhancing the electrocatalytic activity of SiO2@VOP composites. Electrocatalytic HER measurements indicated excellent activity with low overpotential (108 mV), small Tafel slope (98 mV/dec), and high current density stability with the GCE/CB@SiO2@VOP(B) electrode. |
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