A silica-immobilized Pt^(2+) catalyst for the selective,aerobic oxidation of methane via an electron-transfer chain  

作　　者：Zengjian An Xiulian Pan Xiumei Liu Xiuwen Han Xinhe Bao 

机构地区：[1]State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

出　　处：《Journal of Natural Gas Chemistry》2008年第2期120-124,共5页天然气化学杂志（英文版）

基　　金：Ministry of Science and Technology of China (2005CB221405)

摘　　要：The combination of Pt^2＋, benzoquinone and NaNO2 forms an electron-transfer chain, which leads to the oxidation of methane by O2 in CF3COOH aqueous solution. The overall turnover number per hour （TOF） of methane at 120 ℃ is 0.5 h^-1, however, only about one fourth （23%） of methane is converted to the desired product of methanol in the formation of CF3COOCH3. The over-oxidation of methane to CO2, over the catalyst with the Pt^2＋ species immobilized via 2,2＇-bipyridyl as a ligand on the silica substrate, is depressed distinctly. Under the same conditions, the conversion to methanol dominates, and no CO2 is observed, on account of the over-oxidation of methane, as confirmed by the isotope experiment.The combination of Pt^2＋, benzoquinone and NaNO2 forms an electron-transfer chain, which leads to the oxidation of methane by O2 in CF3COOH aqueous solution. The overall turnover number per hour （TOF） of methane at 120 ℃ is 0.5 h^-1, however, only about one fourth （23%） of methane is converted to the desired product of methanol in the formation of CF3COOCH3. The over-oxidation of methane to CO2, over the catalyst with the Pt^2＋ species immobilized via 2,2＇-bipyridyl as a ligand on the silica substrate, is depressed distinctly. Under the same conditions, the conversion to methanol dominates, and no CO2 is observed, on account of the over-oxidation of methane, as confirmed by the isotope experiment.

关 键 词：METHANE PLATINUM selective oxidation electron-transfer chain 

分 类 号：TE64[石油与天然气工程—油气加工工程]