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Mesoporous Co3O4 and Au/Co3O4 Catalysts for Low-Temperature Oxidation of Trace Ethylene
Abstract
Low-temperature catalysts of mesoporous Co(3)O(4) and Au/Co(3)O(4) with high catalytic activities for the trace ethylene oxidation at 0 degrees C are reported in this paper. The catalysts were prepared by using the nanocasting method, and the mesostructure was replicated from three-dimensional (3D) cubic KIT-6 silicas. High resolution transmission electron microscopy (HRTEM) studies revealed that {110} facets were the exposed active surfaces in the mesoporous Co(3)O(4), whereas the Co(3)O(4) nanosheets prepared by the precipitation method exhibited the most exposed {112} facets. We found that the mesoporous Co(3)O(4) was significantly more active for ethylene oxidation than the Co(3)O(4) nanosheets. The results indicated that the crystal facet {110} of Co(3)O(4) played an essential role in determining its catalytic oxidation performance. The synthesized Au/Co(3)O(4) materials, in which the gold nanoparticles were assembled into the pore walls of the Co(3)O(4) mesoporous support, exhibited stable, highly dispersed, and exposed gold sites. Gold nanoparticles present on Co(3)O(4) readily produced surface-active oxygen species and promoted ethylene oxidation to achieve a 76% conversion at 0 degrees C, which is the highest conversion reported yet.
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Sing, K. S. W. (1985) · Pure and Applied Chemistry · doi:10.1351/pac198557040603 · Cited by 24,485
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Wang, Z., Huang, Z., Brosnahan, J. T., Zhang, S., Guo, Y., Guo, Y., Wang, L., Wang, Y., & Zhan, W. (2019) · Environmental Science & Technology · doi:10.1021/acs.est.9b01929 · Cited by 377
Zhao, Q., Zheng, Y., Song, C., Liu, Q., Ji, N., Ma, D., & Lu, X. (2020) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2019.118552 · Cited by 325
Metadata
- Authors
- Ma, C. Y., Mu, Z., Li, J. J., Jin, Y. G., Cheng, J., Lu, G. Q., Hao, Z. P., & Qiao, S. Z.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-02-08
- Volume
- 132
- Issue
- 8
- Pages
- 2608-2613
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1982473217
- Cited by
- 510
- References
- 1
- FWCI
- 16.53
- Type
- journal article
- Language
- en
- Open access
- closed
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