Liquid-Phase Selective Hydrogenation of 1-Heptyne over Pd/TiO2 Catalyst Synthesized by One-Step Flame Spray Pyrolysis

Abstract

The Pd/TiO 2 nanoparticles synthesized by one-step flame spray pyrolysis (FSP) with Pd loadings 0.5-10 wt% showed good catalytic performances in the liquid-phase selective hydrogenation of 1-heptyne. Higher selectivities to 1-heptene at complete conversion of 1-heptyne were obtained on the FSP-derived catalysts compared to the ones prepared by conventional impregnation of palladium on the FSP-synthesized and the commercial P-25 TiO 2 supports. Based on the characterization results from X-ray diffraction (XRD), transmission electron microscopy (TEM), CO-pulse chemisorption, and X-ray photoelectron spectroscopy (XPS), the improved catalytic properties of Pd/TiO 2 were attributed to a stronger interaction/an intimate contact between the very fine Pd particles and the TiO 2 support obtained via one-step FSP synthesis.

Acetylene hydrogenation on anatase TiO2(101) supported Pd4 cluster: oxygen deficiency effect

“…After noble metal supported on reducible TiO 2 , it will manifest superior catalytic performance in hydrogenation reactions for the interaction effect. Among them, the Pd-TiO 2 catalysts have received particular interest in acetylene hydrogenation [6,7].…”

Room temperature hydrogenation of furfuryl alcohol by Pd/titanate nanotube

“…This result indicates that Pd nanoparticles are negatively charged on the NaBH 4 reduced Pd/anatase catalyst and the SMSI is present [32,33]. On the contrary, a relatively weak electronic interaction between Pd and TNT(-H) is noticed.…”

Flame-made Pt/TiO2 catalysts for the liquid-phase selective hydrogenation of 3-nitrostyrene

“…Flame-made nanomaterials find application in many catalytic reactions such as oxidation, photocatalytic degradation [14], lean-NO x storage reduction [15], hydrogenation [13,[16][17][18], and dehydrogenation [19,20]. Interestingly, superior catalytic performances have been reported for the flame-made catalysts compared to those prepared by conventional impregnation method, for example, Pd/Al 2 O 3 in the hydrogenation of ethyl pyruvate [21], Pt/Al 2 O 3 in the dehydrogenation of propane [20], and Pd/TiO 2 in the liquid-phase selective hydrogenation of 1-heptyne [22]. The structural differences of the flame-made and conventionally prepared catalysts have often been explained as the reasons for the differences in their catalytic behaviors.…”