Au/gamma-MnO2 catalyst for solvent-free toluene oxidation with oxygen

作者：Jiang Feng; Zhu Xiaowen; Fu Baosong; Huang Jinjin; Xiao Guomin^*

来源：Chinese Journal of Catalysis, 2013, 34(9): 1683-1689.

DOI：10.1016/S1872-2067(12)60633-0

• Manganese dioxide
• Nano-gold catalyst
• Toluene oxidation
• Solvent-free

alpha-, delta-, and gamma-MnO2 were synthesized by a redox method and Au/gamma-MnO2 catalysts with different Au loadings (0.5%-3.0%) were synthesized by an in situ reduction method. The supports and catalysts were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy (TEM), and N-2 adsorption. TEM images showed that the Au particles were about 10 nm. The catalysts were used in solvent-free toluene oxidation with oxygen. The results showed that toluene conversion increased with increasing Au loading, which was ascribed to the increasing amount of Au particles and also the smaller Au particles. The Au loading gave a uniquely high selectivity to benzaldehyde. The Au/gamma-MnO2 catalysts exhibited good reusability in liquid phase toluene oxidation.

• 出版日期2013-9
• 单位东南大学