Strong electronic metal-support interactions on supported Pt catalysts for efficient perhydrogenation of polyaromatics to aviation fuels

Selective deep hydrosaturation of polyaromatics has attracted significant attention in reinforcing the utilization of heavy resources and decreasing the emission of harmful particulate matters. Herein, supported Pt catalysts on diverse oxide supports (SiO2, TiO2, CeO2) were prepared using an enhanced strong electrostatic adsorption tactics. Strong electronic metal-support interactions (EMSI) in Pt/TiO2 and Pt/CeO2 leaded to the well-dispersed electron-deficient Pt delta+ substances and intensified hydrogen spillover capacity, where the most Pt delta+ and spillover hydrogen were acquired on Pt/CeO2 ascribed to the maximal EMSI and lower oxygen vacancy formation energy heightened the adsorption of metallic Pt. Moreover, the Pt delta+ species displayed promoted H-2 dissociation ability and boosted adsorption energy for aromatic. In phenanthrene hydrogenation, Pt/TiO2 presented better activity and selectivity to deep hydrosaturation products than Pt/SiO2 catalyst, indicating the enhancement of EMSI in hydrogenation. Meanwhile, the catalytic properties were further improved over Pt/CeO2 exhibiting the highest rate of 3.63 x 10(-4) mol.kg(-1).s(-1). It delivered almost 100% conversion and selectivity to deep hydrogenation at 220 degrees C because of the maximal of Pt delta+ species with superb dispersion and hydrogen spillover. Furthermore, the DFT calculations manifested the enhanced adsorption of aromatic on Pt delta+ species promoting deep hydrogenation.