Metal-free borocarbonitrides as electrocatalysts for the hydrogen evolution reaction under alkaline media
This study presents the successful production of metal-free borocarbonitrides (BCN) based on graphene as carbon sources, and its application for hydrogen evolution reaction (HER) in alkaline medium (1 M KOH) via one-step pyrolysis. Synthesis parameters such as the temperature and calcination time we...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/40484 |
| Acceso en línea: | https://doi.org/10.1016/j.jelechem.2024.118856 https://hdl.handle.net/10578/40484 |
| Access Level: | acceso abierto |
| Palabra clave: | Alkaline media Borocarbonitride HER Heteroatom doping Metal-free |
| Sumario: | This study presents the successful production of metal-free borocarbonitrides (BCN) based on graphene as carbon sources, and its application for hydrogen evolution reaction (HER) in alkaline medium (1 M KOH) via one-step pyrolysis. Synthesis parameters such as the temperature and calcination time were optimized in order to improve the electrocatalytic activity being 10 h and 900 °C the optimal conditions of calcination. These conditions generated a low oxygen content and a stable graphene-like structure doped with B and N. In-depth XPS analysis revealed the strong N-B bond formed during the calcination, allowing the creation of a stable and homogeneous Bsingle bondCsingle bondN ternary material. The ratio of B:N were optimized obtaining for a ratio 0.5:40 the most active catalyst. This catalyst reached an overpotential at 10 mA cm-2 of 295 mV in 1 M KOH after an activation under Linnear Sweep Voltammetry (LSV) and chronopotentiometry, which is close to that observed for a commercial 20 % Pt/C catalyst. |
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