期刊
RSC ADVANCES
卷 4, 期 49, 页码 25729-25735出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra01702a
关键词
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资金
- Natural Science Foundation of China [20776089]
- New Century Excellent Talent Project of China [NCET-05-0783]
The CoOx-doped silica and its supported gold nanoparticles were synthesized by conventional thermal treatment or plasma treatment. The activity for CO oxidation displayed 100% CO conversion at only 338 K over the O-2 plasma-treated Au/CoOx/SiO2-PO catalyst. Analysis of the results suggested that, different from the traditional calcined gold catalyst, the metal particles in the plasma-treated samples tended to be smaller and more homogeneous and highly dispersed on the surface of the support. The microstructure with a large surface contact and mesoporosity was more appropriate for the reactions. In addition, the O-2 atmosphere plasma-treated samples generated a large amount of oxygen-supply centers, which in turn facilitated the low-temperature CO oxidation reaction. The plasma technique under an oxygen atmosphere is proved as an efficient treatment technique for gold catalysts.
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