Oxidation of methanol to methyl formate over supported Pd nanoparticles: insights into the reaction mechanism at low temperature

Wojcieszak, Robert; Karelovic, Alejandro; Gaigneaux, Eric; Ruiz, Patricio

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. © the Partner Organisations 2014.

Más información

Título según SCOPUS: Oxidation of methanol to methyl formate over supported Pd nanoparticles: Insights into the reaction mechanism at low temperature
Título de la Revista: CATALYSIS SCIENCE & TECHNOLOGY
Volumen: 4
Número: 9
Editorial: ROYAL SOC CHEMISTRY
Fecha de publicación: 2014
Página de inicio: 3298
Página final: 3305
Idioma: English
DOI:

10.1039/c4cy00531g

Notas: SCOPUS - ISI and Scopus DOI: 10.1039/C4CY00531G