One-step synthesis of Cu@FeNi core-shell nanoparticles: Highly active catalyst for hydrolytic dehydrogenation of ammonia borane

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• 作者：Hong-Li Wang ; Jun-Min Yan ; ^{junminyan@jlu.edu.cn} ; Zhi-Li Wang ; Qing Jiang ; ^{jiangq@jlu.edu.cn}
• 关键词：Trimetallic core&ndash ; shell ; Nanocatalyst ; Activity ; Hydrogen ; Ammonia borane
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：July, 2012
• 卷：37
• 期：13
• 页码：10229-10235
• 文件大小：694 K

摘要

This paper investigates a facile and one-step synthesis of trimetallic magnetic Cu@FeNi core-shell nanoparticles, which are composed of crystalline Cu cores and amorphous FeNi shells, at room temperature under ambient atmosphere within 2聽min. It is found that among the Cu@FeNi system, Cu_0.4@Fe_0.1Ni_0.5 shows the best synergistic performance for catalyzing the hydrolytic dehydrogenation of ammonia borane with the activation energy of 32.9聽kJ/mol, being lower than most of the reported data, and the catalytic activity of Cu_0.4@Fe_0.1Ni_0.5 is much better than its monometallic, bimetallic and trimetallic counterparts whether in states of pure metals, alloys or physical mixtures. Further, the present catalyst has a good recycle stability with an easy magnetic separation method.