中文摘要：

以聚甲基氢硅氧烷为硅源，在反相微乳液体系中刺备了新型疏水性催化剂Me／PMHS（Me为Co，Mn，Cu和Fe）。该催化剂在催化乙苯选择氧化反应中显示出较高的活性：在393K，1．0MPa氧气，以Co／PMHS为催化剂，无溶剂条件下反应10h，转化率达52．0％，苯乙酮选择性达84．8％。本研究采用红外光谱、质谱、接触角测定仪对催化剂的结构、表面状态等进行了表征，结果表明，催化剂表面的疏水性有利于反应物乙苯的吸附和产物的脱附，从而提高催化剂催化乙苯选择氧化的活性。

英文摘要：

The hydrophobic catalysts Me/PMHS （ Me includes Co, Mn, Cu and Fe ） were prepared with polymethylhydrosiloxane （PMHS） in the reverse micro emulsion system. These materials exhibited excellent catalytic activity for selective oxidation of ethylbenzene to acetophenone. Under 1.0 MPa 02 at 393 K for 10 h over Co/PMHS catalyst, the conversion of ethylbenzene reached 52.0 % with the selectivity of acetophenone 84.8%. These catalysts were well characterized with IR, MS and contact angle measurement. It is concluded that the hydrophobic surface of cobalt oxide play a key role in facilitating ethylbenezne adsorption and acetophenone desorption.