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Nanocasted Synthesis of Mesoporous LaCoO3 Perovskite with Extremely High Surface Area and Excellent Activity in Methane Combustion
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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Cites
Generalized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks
Yang, P., Zhao, D., Margolese, D. I., Chmelka, B. F., & Stucky, G. D. (1998) · Nature · doi:10.1038/24132 · Cited by 2,493
Cited by
Chatenet, M., Pollet, B. G., Dekel, D. R., Dionigi, F., Deseure, J., Millet, P., Braatz, R. D., Bazant, M. Z., Eikerling, M., Staffell, I., et al. (2022) · Chemical Society Reviews · doi:10.1039/d0cs01079k · Cited by 2,025
Lim, J., Yang, Y., & Hoffmann, M. R. (2019) · Environmental Science & Technology · doi:10.1021/acs.est.9b01449 · Cited by 404
Cheng, G., Kou, T., Zhang, J., Si, C., Gao, H., & Zhang, Z. (2017) · Nano Energy · doi:10.1016/j.nanoen.2017.05.043 · Cited by 349
Highly defective CeO 2 as a promoter for efficient and stable water oxidation
Liang, F., Yu, Y., Zhou, W., Xu, X., & Zhu, Z. (2015) · Journal of Materials Chemistry A · doi:10.1039/c4ta05770h · Cited by 266
Metadata
- Authors
- Wang, Y., Ren, J., Wang, Y., Zhang, F., Liu, X., Guo, Y., & Lu, G.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- 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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- Wang, Y., Ren, J., Wang, Y., Zhang, F., Liu, X., Guo, Y., & Lu, G. (2008). Nanocasted Synthesis of Mesoporous LaCoO3 Perovskite with Extremely High Surface Area and Excellent Activity in Methane Combustion. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp8048394
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