Li W B, Zhuang M, Xiao T C, Green M L H
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, P R China.
J Phys Chem B. 2006 Nov 2;110(43):21568-71. doi: 10.1021/jp063580g.
Complete catalytic oxidation of toluene was investigated on Cu-Mn doped mesoporous and microporous catalysts, i.e., Cu-Mn/MCM-41, Cu-Mn/beta-zeolite, Cu-Mn/ZSM-5 (where SiO2/Al2O3 is either 25 or 38), and Cu-Mn/porous silica, in the presence of excess oxygen. The result shows that mesoporous catalysts have exhibited the highest catalytic activity among these catalysts above. The less amount of coke formation due to the unique mesoporous structures could play a key role in the high activity on the mesoporous catalyst. In addition, the bimetallic Cu-Mn-MCM-41 supported catalyst shows higher oxidation activity than either single metal catalyst, i.e., Cu-MCM-41 and Mn-MCM-41. The highly dispersed Cu-Mn mixed oxides on mesoporous structures probably provide active sites for the complete oxidation of toluene on these mesoporous catalysts.
在过量氧气存在的条件下，对掺杂铜锰的介孔和微孔催化剂，即铜锰/MCM-41、铜锰/β-沸石、铜锰/ZSM-5（二氧化硅/氧化铝比为25或38）以及铜锰/多孔二氧化硅上甲苯的完全催化氧化进行了研究。结果表明，介孔催化剂在上述这些催化剂中表现出最高的催化活性。由于独特的介孔结构导致的焦炭形成量较少，可能是介孔催化剂具有高活性的关键因素。此外，双金属铜锰-MCM-41负载型催化剂比单一金属催化剂，即铜-MCM-41和锰-MCM-41，表现出更高的氧化活性。介孔结构上高度分散的铜锰混合氧化物可能为这些介孔催化剂上甲苯的完全氧化提供了活性位点。
