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在无表面活性剂和载体的情况下,使用硼氢化钠作为还原剂,简单快速地合成了Cu Mo非贵金属纳米粒子。采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)、选区电子衍射(SAED)、电感耦合等离子体原子发射光谱(ICP-AES)、光电子能谱(XPS)和比表面积分析(BET)等方法详细地表征了所合成的CuMo纳米粒子,并在室温下将其用于催化氨硼烷水解产氢。所合成的Cu0.9Mo0.1纳米粒子对于氨硼烷水解制氢表现出优异的催化性能,在室温下其转化频率(TOF)达到14.9 min~(-1),在已报道的Cu催化剂中处于相对较高的值。这种简单的合成方法不仅仅局限于合成CuMo纳米粒子,还可以扩展到合成CuW(3.6 min~(-1))、CuCr(2 min~(-1))、NiMo(55.6 min~(-1))和CoMo(21.7 min~(-1))纳米粒子,它提供了一种普适的方法合成Cu-M(M=Mo,W,Cr)和TM-Mo(TM=Cu,Ni,Co)纳米粒子作为一系列新型催化剂用于氨硼烷水解。双金属纳米粒子增强的催化活性归因于应力和配体效应诱导的Cu-M纳米粒子的协同促进效果。
Cu Mo non-noble metal nanoparticles were synthesized simply and rapidly using sodium borohydride as a reducing agent in the absence of surfactant and carrier. The microstructure and mechanical properties were characterized by XRD, TEM, HRTEM, SAED, ICP-AES, XPS ) And specific surface area analysis (BET) were used to characterize the synthesized CuMo nanoparticles. The synthesized CuMo nanoparticles were used to catalyze the hydrogen production of ammonia borane at room temperature. The prepared Cu0.9Mo0.1 nanoparticles showed excellent catalytic performance for ammonia hydrolysis of ammonia borane, and the conversion frequency (TOF) reached 14.9 min ~ (-1) at room temperature. In the reported Cu catalysts, Relatively high value. This simple synthesis method is not limited to the synthesis of CuMo nanoparticles, but also extends to CuM (3.6 min -1), CuCr (2 min -1), NiMo (55.6 min -1 ) And CoMo (21.7 min -1) nanoparticles, which provide a universal method for the synthesis of Cu-M (TM = Cu, Ni, Co ) Nanoparticles are used as a series of novel catalysts for ammonia borane hydrolysis. The enhanced catalytic activity of bimetallic nanoparticles is attributed to the synergistic effect of Cu-M nanoparticles induced by stress and ligand effects.