Mesoporous Co3O4 and AU/CO3O4 catalysts for low-temperature oxidation of trace ethylene

Ma, Chun Yan, Mu, Zhen, Li, Jin Jun, Jin, Yong Gang, Cheng, Jie, Lu, Gao Qing, Hao, Zheng Ping and Qiao, Shi Zhang (2010) Mesoporous Co3O4 and AU/CO3O4 catalysts for low-temperature oxidation of trace ethylene. Journal of the American Chemical Society, 132 8: 2608-2613. doi:10.1021/ja906274t

Author Ma, Chun Yan
Mu, Zhen
Li, Jin Jun
Jin, Yong Gang
Cheng, Jie
Lu, Gao Qing
Hao, Zheng Ping
Qiao, Shi Zhang
Title Mesoporous Co3O4 and AU/CO3O4 catalysts for low-temperature oxidation of trace ethylene
Formatted title
Mesoporous Co3O4 and AU/Co3O4 catalysts for low-temperature oxidation of trace ethylene
Journal name Journal of the American Chemical Society   Check publisher's open access policy
ISSN 0002-7863
Publication date 2010-03-03
Sub-type Article (original research)
DOI 10.1021/ja906274t
Volume 132
Issue 8
Start page 2608
End page 2613
Total pages 6
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2011
Language eng
Formatted abstract
Low-temperature catalysts of mesoporous Co3O4 and Au/Co3O4 with high catalytic activities for the trace ethylene oxidation at 0 °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 Co3O4, whereas the Co3O4 nanosheets prepared by the precipitation method exhibited the most exposed {112} facets. We found that the mesoporous Co3O4 was significantly more active for ethylene oxidation than the Co3O4 nanosheets. The results indicated that the crystal facet {110} of Co3O4 played an essential role in determining its catalytic oxidation performance. The synthesized Au/Co3O4 materials, in which the gold nanoparticles were assembled into the pore walls of the Co3O4 mesoporous support, exhibited stable, highly dispersed, and exposed gold sites. Gold nanoparticles present on Co3O4 readily produced surface-active oxygen species and promoted ethylene oxidation to achieve a 76% conversion at 0 °C, which is the highest conversion reported yet.
© 2010 American Chemical Society.
Keyword Fischer-Tropsch synthesis
Carbon-monoxide oxidation
Supported gold catalysts
Co oxidation
Solvothermal synthesis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Sun, 21 Mar 2010, 00:04:09 EST