MoS2-based materials as alternative cathode catalyst for PEM electrolysis
<p> Pt and Ir are the popular catalysts for electrochemical water splitting, but their low abundance on Earth’s crust and high price render them unsustainable for future use. In the quest for alternative catalyst materials, a popular hydro-treating catalyst, molybdenum disulphide (Mo...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Recursos: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2072/305898 |
| Acesso em linha: | http://hdl.handle.net/2072/305898 https://doi.org/10.1016/j.ijhydene.2014.08.078 |
| Access Level: | acceso abierto |
| Palavra-chave: | PEM electrolyser HER MoS2 carbon black reduced graphene oxide |
| Resumo: | <p> Pt and Ir are the popular catalysts for electrochemical water splitting, but their low abundance on Earth’s crust and high price render them unsustainable for future use. In the quest for alternative catalyst materials, a popular hydro-treating catalyst, molybdenum disulphide (MoS<sub>2</sub>), has been found to be promising for hydrogen evolution reaction (HER). Two types of MoS<sub>2</sub>-carbon composites, (i) physical mixture of MoS<sub>2</sub> and carbon black (Vulcan<sup>®</sup>) and (ii) MoS<sub>2</sub> supported on reduced graphene oxide (RGO), were examined. Among the MoS<sub>2</sub>-based materials tested, 47 wt% MoS<sub>2</sub>/Vulcan<sup>®</sup> gave the best performance in terms of current density at an encouraging level for practical application. The poor performance of bare MoS<sub>2</sub> was attributed to its poor electrical conductivity. No indication of performance deterioration was observed for 18 h of continuous operation at 2.0 V cell voltage with 47 wt% MoS<sub>2</sub>/Vulcan<sup>®</sup>. MoS<sub>2</sub>/RGO hybrids showed HER activity, which was considerably higher than that of bare MoS<sub>2</sub>.</p> |
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