Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 199, Issue -, Pages 164-170Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.12.017
Keywords
Porous material; Perovskite-type oxide; Lanthanum ferrite; Hydrothermal preparation method; Toluene combustion
Funding
- NSF of China [21077007, 20973017]
- NSF of Beijing Municipality [2102008]
- Creative Research Foundation of Beijing University of Technology [00500054R4003, 005000543111501]
- Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality [PHR201007105, PHR201107104]
- [005000541212014]
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Porous LaFeO3 (LFO) samples with surface areas of 15-26 m(2)/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 degrees 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 T-10%, T-50%, and T-90% of 180, 250, and 270 degrees 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. (C) 2012 Elsevier Inc. All rights reserved.
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