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 Cu0.4@Co0.sCr0.1 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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
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
关键词
原位合成
核壳结构
合金
硼氨配合物
多相催化
产氢
in-situ synthesis
core/shell structure
alloy
ammonia borane
heterogeneous catalysis
hydrogen generation
