Low-Temperature Catalytic Oxidation of Glycerol to Glyceric Acid over Zr@MCM-41 Supported Pt Catalyst

Abstract

AbstractA series of mesoporous Zr@MCM-41 zeolite with different Si/Zr molar ratios were prepared with cetyltrimethylammonium bromide (CTAB) as template. And then Pt nanoparticles were successfully loaded onto the Zr@MCM-41 by colloid-deposition method. These catalysts were evaluated for catalytic oxidation of glycerol to glyceric acid at low-temperature. The results showed that the molar ratios of Si/Zr affected oxidizing of the primary OH group, in turn affects the catalytic activity and selectivity. The Pt/Zr@MCM-41-100 catalyst showed the best catalytic activity with the conversion of glycerol and selectivity for glyceric acid reached 50.7% and 65.0%, respectively. A combination of multi-characterizations by X-ray diffraction (XRD), N2adsorption and desorption, Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Ultraviolet-visible (UV-vis) spectroscopy. The result confirmed that the catalytic activity of Pt/Zr@MCM-41-100 was related to the support structure, the dispersion of the Pt nanoparticles and the interaction between Pt nanoparticles and the support. Meanwhile, we investigated the stability of Pt/Zr@MCM-41-100 catalyst and analyzed the deactivation reasons by charaterization.