Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 148, Issue -, Pages 490-498Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2013.11.030
Keywords
Perovskite; Sol-gel synthesis; Toluene oxidation; Low-temperature reducibility; Surface adsorbed oxygen
Funding
- National Basic Research Program of China [2010CB732300, 2013CB933201]
- National High Technology Research and Development Program of China [2011AA03A406]
- 111 Project [B08021]
- Universite Lyon 1
- CNRS
Ask authors/readers for more resources
Perovskite-type oxides of LaMnO3 (LMO) were synthesized by citrate sol-gel (SG), glycine combustion (GC) and co-precipitation (CP) methods, respectively. The physicochemical properties of these LaMnO3 materials were characterized by XRD, N-2 sorption, H-2-TPR and O-2-TPD. Their catalytic performances were evaluated for the oxidation of toluene. It was shown that well-formed perovskite structures were obtained over samples LMO-SG and LMO-GC. Traces of La2O3 phase were detected over sample LMO-CP. The ranking in terms of specific surface area, low-temperature reducibility and concentration of surface adsorbed oxygen species from the highest to the lowest value was LMO-SG > LMO-CP > LMO-GC, which was in good agreement with the catalytic activity order. Sample LMO-SG exhibited the optimum catalytic activity and durability without any deactivation observed during the steady state of 60 h. Its superior catalytic performance could be greatly attributed to its higher specific surface area, better lowtemperature reducibility and more available surface adsorbed oxygen species. The apparent activation energies of samples LMO-SG, LMO-GC and LMO-CP were 71, 84 and 76 kJ mol(-1), respectively. The lowest apparent activation energy of sample LMO-SG was in good agreement with its better catalytic behavior for toluene oxidation. (c) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available