Glucose-assisted hydrothermal preparation and catalytic performance of porous LaFeO3 for toluene combustion

Porous LaFeO3 (LFO) samples with surface areas of 15–26 m2/g and orthorhombic structures were prepared via a glucose-assisted hydrothermal route. Physicochemical properties of the materials were characterized by means of a number of techniques, and their catalytic activities were evaluated for toluene combustion. It is found that the sample (LFO-170) derived at a hydrothermal temperature of 170 °C possessed the highest surface area and surface oxygen concentration and the best low-temperature reducibility. Among the LFO samples, the LFO-170 sample showed the best performance for toluene combustion, giving the T10%, T50%, and T90% of 180, 250, and 270 °C at space velocity=20,000 mL/(g h), respectively. The apparent activation energies of the LFO samples were 50–55 kJ/mol. We believe that the high surface area and surface oxygen concentration and good low-temperature reducibility were responsible for the good catalytic performance of the LFO-170 sample.

Graphical abstractPorous LaFeO3 is prepared by the glucose-assisted hydrothermal method. The good catalytic performance of porous LaFeO3 for toluene combustion is ascribed to high surface area and Oads concentration and good reducibility.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► 3D porous LaFeO3 is prepared by the glucose-assisted hydrothermal method. ► A suitable hydrothermal temperature is needed for 3D porous LaFeO3 formation. ► 3D porous LaFeO3 is high in surface area and Oads content and good in reducibility. ► 3D porous LaFeO3 performs well in the combustion of toluene. ► Catalytic activity is governed by surface area, Oads concentration, and reducibility.