Optimization of the catalytic support and membrane for the electrochemical reforming of ethanol in alkaline media
BACKGROUND: In this work, the influence of the anodic catalyst carbonaceous support and the membrane on the electrochem-ical reforming of ethanol for hydrogen production in alkaline media has been studied. Physicochemical characterization andelectrochemical activity measurements were performed for d...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/29824 |
| Acceso en línea: | http://hdl.handle.net/10578/29824 |
| Access Level: | acceso abierto |
| Palabra clave: | Alkaline media Carbonaceous supports Electrolysis Ethanol electro-oxidation Palladium catalyst Medios alcalinos Soportes carbonosos Electrólisis Electrooxidación de etanol Catalizador de paladio |
| Sumario: | BACKGROUND: In this work, the influence of the anodic catalyst carbonaceous support and the membrane on the electrochem-ical reforming of ethanol for hydrogen production in alkaline media has been studied. Physicochemical characterization andelectrochemical activity measurements were performed for different palladium-based anodic catalysts. The best anodic catalystwas scaled up to two different membrane electrode assemblies (MEAs) based on anion exchange membranes (AEMs): Tokuyamaand KOH-doped polybenzimidazole (PBI) membranes. In both systems, the influence of the temperature and the stability wereevaluated for the electrochemical reforming of ethanol.RESULTS: Among the different investigated catalysts, palladium supported on non-functionalized low-surface nanofibers wasthe best anodic catalyst for the electrochemical reforming of ethanol in alkaline media, which was attributed to the specificphysicochemical and textural properties of this material. In addition, the use of a Tokuyama membrane allowed to obtainthe highest electrocatalytic activity in hydrogen production together with a suitable stability behavior. Under the optimizedconditions, current density values up to 120 mA cm−2at 1.4 V were obtained, leading to lower energy values for hydrogenproduction compared with those of water electrolysis in commercial alkaline electrolyzers.CONCLUSION: The choice of palladium supported on non-functionalized nanofibers as anodic catalyst and a Tokuyamamembrane allows to obtain the best MEA configuration for the electrochemical reforming of ethanol for hydrogen production. |
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