中空微结构合金Pt/Cu的制备及其对氨硼烷水解释氢的催化活性  

Fabrication of Pt/Cu Hollow Alloy Microstructure and Its Catalytic Activity for Hydrolysis of NH3BH3

作　　者：刘全兴 刘亚伟 张军[1] 杜西刚[1] 李想 LIU Quanxing;LIU Yawei;ZHANG Jun;DU Xigang;LI Xiang(Chemical Engineering&Pharmaceutics School,Henan University of Science&Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2021年第2期100-104,M0008,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21576073,21076063)。

摘　　要：通过铜(Cu)还原铂(Pt)伽伐尼置换的液相化学反应途径,在温和条件下制备了具有中空结构的Pt/Cu微纳米合金粒子,借助于氨硼烷的水解释氢反应对其催化活性进行了评价。研究结果表明:所制得的系列双金属合金Pt/Cu纳米粒子,平均粒径约45 nm,呈中空微结构,分散性良好,且其赋存状态为独立的单金属Cu和Pt,未形成化合物或新物相。在室温下,Pt/Cu双金属纳米粒子对氨硼烷水解的催化活性均高于Cu粒子,Pt/Cu-0.75的催化活性明显高于Pt粒子,催化转化频率为67.22 min-1,表观活化能为35.75 kJ·mol-1。Pt/Cu micro-nano alloy particles with hollow microstructure were fabricated by liquid phase chemical reaction for Cu chemical reduction-Pt Gavanic substitution under mild conditions.The catalytic activity was evaluated by release of hydrogen gas form hydrolysis of ammonia borane.The results show that the serial bimetallic Pt/Cu nanoparticles,with an average particle size of about 45 nm,has hollow microstructure and good dispersion.The existential states are still independent single metal Cu and Pt with no compound or new phase formed.The catalytic activity of Pt/Cu bimetallic nanoparticles on the hydrolysis of ammonia borane is higher than that of Cu particles at room temperature,and the catalytic activity of Pt/Cu-0.75 is significantly higher than that of Pt particles.The catalytic turnover frequency is 67.22 min-1,with the apparent activation energy of 35.75 kJ·mol-1.

关 键 词：Pt/Cu中空合金 液相制备 催化活性 氨硼烷 水解释氢 

分 类 号：TQ423[化学工程] O614[理学—无机化学]