Catalytic conversion of ethanol on MCF-supported Pt-Ga nanocomposites at varying temperature
Mohit Yadav1, Marietta Ábel1, András Sápi1,2, Ákos Kukovecz1, Zoltán Kónya1,3
(1) University of Szeged, Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry
(2) University of Szeged, Institute of Environmental and Technological Sciences
(3) University of Szeged, MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group
The conversion of ethanol over mesoporous cellular foam silica (MCF-17) supported platinum-gallium composites (1%PtGa/MCF-17) catalyst was performed. The catalysts were prepared by photodeposition method in which the doping concentration of Ga in the composite was varied i.e., 0.1wt%, 1wt.%, and 10wt.%, respectively. The as-synthesized catalysts were characterized by microscopic and spectral techniques and were tested in a quartz bed reactor at temperatures ranging from 200-500 °C. The results revealed that 1wt.% of Ga in the 1% PtGa(99%-1%)/MCF-17 catalyst was observed to be the optimized concentration that actively led to the higher selective oxidation of ethanol into H2, CH3CHO, CO2, CO, and CH4, respectively, compared to undoped 1%Pt/MCF-17 catalyst. This fact was ascribed to the interface developed between the Pt and Ga surface that facilitated the charge transfer after heat treatment that resulted in higher ethanol conversion.