Oxidation of methanol to methyl formate over supported Pd nanoparticles: insights into the reaction mechanism at low temperature
(2014) Catalysis Science & Technology — Vol. 4, p. 3298-3305 (2014)
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- Abstract
- Pd nanoparticles supported on TiO2 and SiO2 (2 wt.%) were synthesized by the water-in-oil microemulsion method. The materials were characterized by standard physico-chemical methods (XRD, ICP, TEM, BET, XPS) and DRIFT in operando mode and tested in the gas-phase reaction of methanol oxidation. The direct formation of methyl formate (MF) from methanol was observed. Supported palladium catalysts produced methyl formate at low temperature (<100 °C) with high selectivity. At higher temperatures methyl formate is no longer formed and the total oxidation to CO2 occurred. The DRIFT-operando study confirmed that methanol is adsorbed mainly in two forms, the undissociated gaseous methanol (via H bond) and dissociatively adsorbed methoxy species (CH3O−) on the surface. Methyl formate is formed already at RT with the maximum at about 80 °C. The mechanism of the formation of methyl formate from methanol at low temperature is discussed
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Wojcieszak, R., Karelovic Burotto, A., Gaigneaux, E., & Ruiz, P. (2014). Oxidation of methanol to methyl formate over supported Pd nanoparticles: insights into the reaction mechanism at low temperature. Catalysis Science & Technology, 4, 3298-3305. https://doi.org/10.1039/C4CY00531G (Original work published 2014)