二烯酸稳定的Pt金属纳米粒子的制备及催化加氢活性

Preparation and Catalytic Hydrogenation Activity of Platinum Nanoparticles Stabilized by Dienoic Acid

制备了4-(双(4-(4-丁氧基苯乙烯基)苯基)氨基)苯甲酸(简称二烯酸,Dienoic Acid)保护的铂纳米颗粒,通过UV-Vis,TEM,XRD对其进行了表征.以间苯氧基苯甲醛的催化加氢反应为模型研究了其催化性能及影响催化活性的因素.实验结果表明:金属纳米粒子粒径随金属/稳定剂摩尔比的下降而减小,而催化加氢反应活性随金属/稳定剂摩尔比的上升而增加.在常压、40℃、n(醛)/n(催化剂)=523条件下,反应10 h可以获得纯度大于99%的间苯氧基苯甲醇.

Platinum nanoparticles stabilized by 4-（ bis（ 4-（4-butoxystyryl） phenyl） amino） benzoic acid （dienoic acid） were prepared by an ethanol reduction method and characterized with UV-Vis, TEM and XRD. The catalytic activities of Pt nanoparticles have been investigated by the hydrogenation of mphenoxy benzaldehyde （ MPBD）. The results show that the size of Pt nanoparticles reduces as the molar ratio of Pt to the stabilizer decreases, while catalytic activities of Pt nanoparticles enhances as the molar ratio of Pt to the stabilizer increases. The conversion of m-phenoxy benzaldehyde was beyond 99 % after 10 h of reaction at the conditions of 40℃, n（MPBO）/n（catal） = 523 and atmospheric pressure of H2.