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采用溶胶-凝胶法制备了TiO2-ZrO2复合氧化物载体,采用浸渍法负载铂和电正性金属(M=Re、Sn或In)制备了Pt/TiO2-ZrO2和Pt-M/TiO2-ZrO2催化剂,用于糠醛液相选择性催化氢化制糠醇。利用X射线衍射、X射线光电子能谱等技术对催化剂进行了表征。结果表明,与单金属铂催化剂相比,加入电正性金属(M=Re、Sn或In)后,催化剂的电子结构发生了改变,从而使双金属催化剂具有更高的催化性能,催化活性增加的顺序与电正性金属的电负性大小次序一致,均为Re>Sn>In。其中,加入铼的催化剂效果最佳,糠醛转化率100%,糠醇的选择性达到95.7%。
The TiO2-ZrO2 composite oxide carrier was prepared by sol-gel method. Pt / TiO2-ZrO2 and Pt-M / TiO2-ZrO2 were prepared by impregnation method using platinum and electropositive metal (M = Re, Sn or In) Catalyst for selective catalytic hydrogenation of furfural to furfuryl alcohol. The catalysts were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The results show that the electronic structure of the catalyst is changed when the electronegative metal (M = Re, Sn or In) is added compared with that of the monometallic platinum catalyst, so that the bimetallic catalyst has higher catalytic activity and catalytic activity The order is the same as the order of electronegativity of electronegative metals, both of which are Re> Sn> In. Among them, the rhenium catalyst was the best, the conversion of furfural was 100% and the selectivity of furfuryl alcohol was 95.7%.