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双金属纳米颗粒具有比单金属纳米颗粒更加优异的催化、光学及电学等性能,常见的双金属纳米颗粒制备方法有共还原法、连续还原法、电沉积法、微乳液法及置换反应法等。其中,置换反应是一种重要的双金属纳米颗粒制备方法,具有反应条件温和、无需其他还原剂、所制备的纳米颗粒粒径分布均匀、结构可调可控等特点。采用该方法制备的合金结构、核壳结构以及空心结构的双金属纳米颗粒均表现出优异的催化性能,本文综述了近年来置换反应制备不同结构双金属纳米颗粒的研究现状,并且提出了置换反应制备双金属纳米颗粒研究中存在的问题和今后可能的发展方向。
Bimetallic nanoparticles have more excellent catalytic, optical and electrical properties than single-metal nanoparticles. The common preparation methods of bimetallic nanoparticles include co-reduction, continuous reduction, electrodeposition, microemulsion and displacement reaction . Among them, the displacement reaction is an important preparation method of bimetallic nanoparticles, with mild reaction conditions, no other reductant, the particle size distribution of the prepared nanoparticles, adjustable structure controllable and so on. The bimetallic nanoparticles with the alloy structure, the core-shell structure and the hollow structure prepared by the method all show excellent catalytic performance. In this paper, the recent research progress on the preparation of bimetallic nanoparticles with different structures by the displacement reaction is reviewed, and the displacement reaction Preparation of bimetallic nanoparticles in the study of the problems and possible future development.