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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1748| Electrochemical evaluation of Pt/GMC and Pt/rGO for the electro-oxidation of methanol | |
| IVAN ALZIRI ESTRADA MORENO | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Electrocatalysis Carbon | |
| In this work, Pt/GMC and Pt/rGO electrocatalysts have been prepared by impregnation reduction method in which Pt precursor is chemically reduced by citric acid, ethanol and Ar- H2 dynamic atmosphere. Graphitic mesoporous carbon (GMC) sample was synthesized via nanocasting process with anhydrous pyrolysis at 1273 K using SBA-15 as hard template and purified sugar as carbon source. SBA-15 was prepared via sol gel using pluronic P-123 as surfactant and TEOS as silica precursor. Reduced graphene oxide (rGO) was synthesized by modified Hummers method using graphite as carbon precursor. The prepared materials were characterized by means of diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and high resolution transmission electron microscopy (HRTEM). The performance of electrocatalysts for methanol oxidation reaction (MOR) was measured by cyclic voltammetry (CV). The electrochemical characterization techniques revealed that the mass activity of Pt/GMC, Pt/rGO and the commercial electrocatalyst Pt/C were 627, 332 and 371 mA/mgPt respectively as well as the carbon monoxide tolerance index ICO for these catalysts were 1.07, 1.04 and 0.76 respectively. Therefore, Pt/GMC shows better electrocatalytic performance and best resistance to carbonaceous intermediates species for the electrooxidation of methanol. | |
| 2016 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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