Enhanced catalytic activity of toluene oxidation over in-situ prepared Mn3O4-Fe2O3 with acid-etching treatment

• DOI: 10.1016/j.catcom.2022.106581
• Publication Date: 2022-12-09T05:58:09Z
• Authors: Juexiu Li; Ruiqin Zhang; Yue Liu; Tonghua Sun; Jinping Jia; Mingming Guo
• Keywords: Benzoic acid; Benzaldehyde; Catalytic Oxidation; Hydrochloric acid

Mn3O4-Fe2O3 composite catalysts are in-situ synthesized via advanced oxidation followed by modifying with hydrochloric acid to improve the catalytic toluene performance. modified 1.0 M HCl (A-1.0) exhibited best activity of oxidation. The temperature 50% conversion is 245 °C and 90% 279 °C. There much more abundant surface lattice oxygen species higher amount high valence manganese iron ions on A-1.0 catalyst, which beneficial for improving activity. In-situ DRIFTs indicated that benzaldehyde benzoic main intermediate products catalyst during