Síntese e caracterização de híbridos PtRu/Carbono com diferentes cargas metálicas pelo método da carbonização hidrotérmica
PtRu/Carbon hybrid materials with different metallic loadings (5, 10 and 20 wt%) were prepared by hydrothermal carbonization using cellulose as carbon source and reducing agent and H2PtCl6.6H2O and RuCl3.xH2O as metals sources and catalysts of the carbonization process. The as-synthesized materials...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Federal de Santa Maria (UFSM) |
| Repositorio: | Revista Ciência e Natura (Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/41273 |
| Acceso en línea: | https://periodicos.ufsm.br/cienciaenatura/article/view/41273 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrocatalysts Methanol electro-oxidation Fuel cells |
| Sumario: | PtRu/Carbon hybrid materials with different metallic loadings (5, 10 and 20 wt%) were prepared by hydrothermal carbonization using cellulose as carbon source and reducing agent and H2PtCl6.6H2O and RuCl3.xH2O as metals sources and catalysts of the carbonization process. The as-synthesized materials were further treated under argon atmosphere at 900 oC and characterized by energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscope (TEM) and cyclic voltammetry (CV). The electro-oxidation of methanol was studied by chronoamperometry. The material prepared using a metallic load of 5 wt% showed the best electroactivity for methanol electrooxidation compared to others obtained materials probably due to the smaller particle size and content of oxides on surface of material. |
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