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Cited by 331

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Nanocasted Synthesis of Mesoporous LaCoO3 Perovskite with Extremely High Surface Area and Excellent Activity in Methane Combustion

Wang, Yangang, Ren, Jiawen, Wang, Yanqin, Zhang, Fengyuan, Liu, Xiaohui, Guo, Yun, Lu, Guanzhong·2008·The Journal of Physical Chemistry C

Abstract

Ordered mesoporous LaCoO 3 perovskite with high surface area was synthesized via nanocasting strategy by using ordered mesoporous cubic ( Ia 3 d ) vinyl silica as the template. The sample, prepared by filling mesopores in silica template with a La−Co citrate complex precursor followed by calcination and silica removal, was characterized by XRD, TEM, and nitrogen sorption techniques, and its catalytic activity was tested for complete methane oxidation. The wide-angle XRD pattern showed LaCoO 3 perovskite was formed and no La-oxide/Co-oxide phases were detected in the obtained material. This LaCoO 3 perovskite displayed a high BET surface area of 96.7 m 2 g −1 from nitrogen sorption analysis and a three-dimensional ordered mesostructure from TEM images, as well as a small-angle XRD pattern. Moreover, this material showed much higher activity in the complete methane oxidation than the conventional bulk LaCoO 3 perovskite. The light-off temperature ( T 10 ) and the half-conversion temperature ( T 50 ) were at 335 and 470 °C, respectively. Further analysis by means of H 2 -TPR and XPS techniques showed that the existence of high valent cobalt ions and high content of O 2 2− /O − species contributed to the high activity.

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Metadata

Authors
Wang, Y., Ren, J., Wang, Y., Zhang, F., Liu, X., Guo, Y., & Lu, G.
Venue
The Journal of Physical Chemistry C
Published
2008-09-09
Volume
112
Issue
39
Pages
15293-15298
ISSN
  • 1932-7447 (ISSN-L)
  • 1932-7455
OpenAlex
W2052452584
Cited by
331
References
1
FWCI
2.53
Type
journal article
Language
en
Open access
closed

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