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Abstract:
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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SOLID STATE SCIENCES
ISSN: 1293-2558
Year: 2014
Volume: 27
Page: 36-42
3 . 5 0 0
JCR@2022
ESI Discipline: PHYSICS;
ESI HC Threshold:202
JCR Journal Grade:2
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 15
SCOPUS Cited Count: 18
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 10
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