【摘要】 采用去合金化法制备了多孔铜(PC),并以此为还原剂和模板与含有贵金属离子的溶液进行置换反应,简单有效地制备了多孔M/PC(M=Ag,Au,Pt,Pd)双金属催化剂,并对样品的形貌、结构和化学组成进行了表征,利用苯甲醇气相选择性催化氧化实验评价了其催化性能.实验结果表明,所制备的多孔铜基催化剂具有良好的双金属协同催化效应,对苯甲醇气相选择性氧化具有很好的催化活性和选择性,其中Ag/PC具有最优的催化性能.更多还原

【Abstract】 We fabricated porous copper(PC) by dealloying Al from Cu-Al alloy and obtained M/PC(M=Ag,Au,Pt,Pd) through galvanic replacement of Cu with noble metals using PC as reductant and template.The structural and chemical properties of the samples were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM) with energy-dispersive X-ray spectroscopy(EDS).The catalytic performance of PC and M/PC for gas-phase selective oxidation of benzyl alcohol was investigated.PC-based M/PC catalysts showed relatively high catalytic activity in oxidation of benzyl alcohol at high temperature,among which 1% Ag/PC had the best catalytic properties.更多还原