Syntheses and Characterization of Zinc Oxide Nanoparticles on Graphene Sheets: Adsorption-Reaction In Situ DRIFTS of Methane and CO2

摘要

Zinc oxide and graphene support as catalyst were synthesized and characterized using different techniques. Results showed that graphene presented thermal stability, and maintained its structure under heat treatment at temperatures of 500 degrees C. TPD He experiments showed decomposition of residual compounds, releasing oxygenated compounds after functionalization of the graphene oxide. The catalyst performance was evaluated for the reaction of CH4+CO2 and O-2 by surface reaction at programmed temperature. We observed the formation of CO, H-2 and H2O. However, TPSR and DRIFTS coupled to a mass spectrometer evidenced methane activation on ZnO/rGO-T, due to the evolution of H-2 and CO2 traces of water and hydrocarbons, such as ethane (C2H6). Less sensitive but present was the signal 60, which can be assigned to the formation of acetic acid (CH3COOH) at 300 degrees C.