Abstract
Abstract Catalytic wet air oxidation (CWAO) of phenols is an important process of environmental catalysis, allowing one to reach nearly complete oxidation of phenols to non-hazardous compounds. Here we report the synthesis of nanocatalysts based on Pt-containing nanoparticles (NPs) formed in the pores of hypercrosslinked polystyrene (HPS) and their catalytic properties in the phenol CWAO under mild conditions. The Pt species were in corporated in HPS using wet impregnation of platinic acid in tetrahydrofuran followed by NaHCO 3 treatment. The catalysts containing from 0.11 to 4.85 wt.% of Pt were studied by XFA, TEM, XAS, XPS, and liquid nitrogen physisorption methods. The NP sizes were found to be independent of the amount of platinic acid used for impregnation, but rather controlled by the pores of HPS. Three types of Pt species: Pt(0), Pt(II), and Pt(IV), constituted the NP composition. The effects of the phenol and catalyst initial concentrations and temperature were investigated in the phenol CWAO. Removal of 97% of the phenol with 94.2% selectivity to CO 2 and H 2 O were observed for the most active catalyst containing 0.95 wt.% Pt.
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