核壳结构Cu@CoCr的合成和对硼氨配合物水解的催化性能  

Core-Shell Structured Cu@CoCr Catalyst:Synthesis and Catalytic Performance for Hydrolysis of Ammonia Borane Aqueous Solution

作　　者：沈晓晨 戴敏 高鸣 王志斌[2] 赵斌[1] 丁维平[1] 

机构地区：[1]南京大学介观化学教育部重点实验室,南京大学化学化工学院,南京210093 [2]南京大学配位化学国家重点实验室,南京大学化学化工学院,南京210093

出　　处：《无机化学学报》2013年第5期999-1006,共8页Chinese Journal of Inorganic Chemistry

基　　金：江苏省自然科学基金(No.BK2010387);国家自然科学基金(No.41172239);中央高校基础科研业务费专项基金(No.1118020513,1106020513)资助项目

摘　　要：通过一步法原位合成了核壳结构的Cu@CoCr三元合金催化剂,该合成方法条件温和、步骤简便。25℃下,Cu0.4@Co0.5Cr0.1三元合金催化剂对于硼氨配合物水解反应的TOF值达到0.242 0 molH2.moLcat-1.s-1,接近Pt、Pd等贵金属的催化活性,反应的活化能仅为35 kJ.mol-1,5次重复使用后仍能保持初始活性的35%。与非核壳结构的CuCoCr合金相比,核壳结构的Cu@CoCr三元合金催化剂的催化性能及稳定性均有明显提高。此外材料自身具有磁性,可进行磁分离,适合于实际应用。The core/shell structured ternary alloy of Cu@CoCr was synthesized by a one-step in-situ synthesis method under mild conditions. The catalytic performance of Cu@CoCr was studied for the hydrolysis of NH3BH3 （AB） aqueous solution. The TOF （turn over frequency） of 0.242 0 molH2＂ molcat s-1 for [e-mail]0.1 catalyst on AB hydrolysis reaction is close to the noble-metal based catalysts, such as Pt, Pd, etc. The activation energy of this catalyst is only 35 kJ.mo1-1. After 5 cycles, this catalyst still keeps 35% of its initial activity. Compared to the non-core/shell structured CuCoCr alloy, the Cu@CoCr catalyst shows great improvements in activity, stability and reusability. Furthermore, the Cu@CoCr catalysts could be recovered by a magnet based on its magnetic properties.

关 键 词：原位合成 核壳结构 合金 硼氨配合物 多相催化 产氢 

分 类 号：O643.36[理学—物理化学] O614.812[理学—化学]