Non-thermal plasma-treated gold catalyst for CO oxidation

作者：Xu Huiyuan; Luo Jingjie; Chu Wei^*

来源：RSC Advances, 2014, 4(49): 25729-25735.

DOI：10.1039/c4ra01702a

• Efficient treatment
• Gold catalysts
• Low-temperature CO oxidation
• Metal particle
• Oxygen atmosphere
• Plasma techniques
• Plasma treatment
• Supported gold

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.

• 出版日期2014
• 单位四川大学; 宜宾学院