Síntese e caracterização de híbridos PtRu/Carbono com diferentes cargas metálicas pelo método da carbonização hidrotérmica

• Main Author: Tusi, Marcelo Marques
• Publication Date: 2020
• Other Authors: Cancian, Ricardo, Polanco, Nataly Soares de Oliveira, Anaissi, Fauze Jacó, Villalba, Juan Carlo, Neto, Almir Oliveira, Spinacé, Estevam Vitorio
• Format: Article
• Language: por
• Source: Revista Ciência e Natura (Online)
• Download full: https://periodicos.ufsm.br/cienciaenatura/article/view/41273
• topic: Electrocatalysts; Methanol electro-oxidation; Fuel cells

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.