Department of Chemistry
Three-dimensionally ordered macroporous SrFeO3−δ with high surface area: Active catalysts for the complete oxidation of toluene
Three-dimensionally ordered macroporous (3DOM) cubic perovskite-type oxides SrFeO 3-δ were prepared using the citrate acid-assisted poly(methyl methacrylate)-templating method in the presence of ethylene glycol, sucrose or l-lysine (denoted as SFO-0, SFO-Sucrose, and SFO-Lysine, respectively). It is found that the SrFeO 3-δ samples possessed a 3DOM architecture and were high in surface area (34-61 m 2/g). The porous SrFeO 3-δ catalysts performed well in toluene combustion, with the SFO-0 sample exhibiting the highest catalytic activity (T 50% = 292 °C and T 90% = 340 °C at 20,000 mL/(g h)). The catalytic activity of the samples showed a good relationship with surface area, oxygen adspecies concentration, and low-temperature reducibility, all decrease in the order of SFO-0 > SFO-Lysine > SFO-Sucrose SFO-bulk. It is deduced that the good catalytic performance of the porous SrFeO 3-δ materials is due to the good low-temperature reducibility, large surface area, and high oxygen adspecies concentration. © 2012 Elsevier B.V.
Colloidal crystal templating preparation method, Low-temperature reducibility, Oxygen-deficient strontium ferrite, Three-dimensional ordered macroporous perovskite-type oxide, Toluene combustion
Source Publication Title
Applied Catalysis A: General
Ji, Kemeng, Hongxing Dai, Jiguang Deng, Lei Zhang, Fang Wang, Haiyan Jiang, and Chak Tong Au. "Three-dimensionally ordered macroporous SrFeO3−δ with high surface area: Active catalysts for the complete oxidation of toluene." Applied Catalysis A: General 425-426 (2012): 153-160.