期刊
SOLID STATE SCIENCES
卷 27, 期 -, 页码 36-42出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2013.10.011
关键词
Three-dimensionally ordered macroporous perovskite-type oxide; Porous material; Europium ferrite; Low-temperature reducibility; Toluene oxidation
资金
- NSF of China [21077007]
- Education and Teaching-Postgraduate Students Education Beijing Municipality Excellent Ph.D. Thesis Supervisor [20111 000501]
- Education and Teaching-Postgraduate Students Cultivation-National Excellent Ph.D. Thesis Supervisor and Cultivation Base Construction [005000542513551]
- Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions
Three-dimensionally macroporous perovskite-type oxides EuFeO3 (EFO-3DOM, EFO-sucrose-1, EFO-sucrose-2, and EFO-sucrose-3, respectively) have been prepared using the polymethyl methacrylate-templating method in the absence or presence of sucrose. Physicochemical properties of the materials were characterized by means of a number of analytical techniques, and their catalytic activities were evaluated for the total oxidation of toluene. It is shown that all of the EFO samples were of single-phase orthorhombic crystal structure with a 3DOM architecture. The sucrose addition during the preparation process had a great effect on the surface area and porous structure of the final product. A clear correlation of surface area, surface oxygen species concentration, and low-temperature reducibility with the catalytic performance was observed. The EFO-sucrose-1 catalyst performed the best, giving the T-50% and T-90% of 312 and 347 degrees C at space velocity = 20,000 mL/(g h), respectively. The apparent activation energies of the 3DOM-structured EFO samples were in the range of 82-97 kJ/mol. It is concluded that the higher surface area and oxygen adspecies concentration and better low-temperature reducibility account for the good catalytic activity of EFO-sucrose-1. (C) 2013 Elsevier Masson SAS. All rights reserved.
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