Characterization and oxidation catalysis of alkylaromatics over CVD Fe/Mo borosilicate molecular sieve: Fe/Mo/DBH

Abstract The Fe/Mo/DBH catalyst exhibited stable p -selective oxidation activity in forming terepohthaldehyde by gas-phase O 2 oxidation of p -xylene under mild reaction conditions with high selectivity. It also catalyzes other reactions such as oxydehydrogenation, hydroxylation of benzene to phenol, and CO 2 activation. The catalyst was characterized by employing combined techniques of Raman spectroscopy, analytical electron microscopy (AEM), high-resolution electron microscopy (HREM), Raman spectroscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and in situ total electron yield near edge spectroscopy (XANES). Two phases, Fe 2 (MoO 4 ) 3 and MoO 3 , were identified by Raman spectroscopy. In situ low-temperature CO 2 -dosing XANES experiments provided evidence for a strongly chemisorbed CO 2 species on Fe/Mo/DBH at the reaction temperature.