铜负载率对纳米Fe/Cu双金属+维生素B_(12)体系中二氯甲烷还原速率的影响及机理

Effects of copper loading on the reduction rate of dichloromethane by bimetallic Fe/Cu nanoparticles + vitamin B_(12) and mechanism

研究了铜负载率对Fe/Cu+B_(12)体系中二氯甲烷还原速率的影响,并对其机理进行了分析。结果表明,铜负载率小于5%时,反应速率随铜负载率的增大而升高,铜负载率5%时,反应速率达到最大;铜负载率大于5%时,反应速率随铜负载率的增大而降低。从Fe/Cu原电池效应和铜表面的催化性能两方面,初步分析了铜负载率对反应速率影响的内在机理。

Effects of copper loading on the reduction rate of dichloromethane by bimetallic Fe/Cu nanoparticles+vitamin B 12 and the mechanism were analyzed.The results show that when the copper loading is less than 5%,the reaction rate increases with the increase of Cu loading rate.When the Cu loading rate was 5%,the reaction rate reached the maximum.When the Cu loading rate is greater than 5%,the reaction rate decreases with the increase of Cu loading rate.The intrinsic mechanism of the effect of the Cu loading rate on the reaction rate was analyzed from two aspects of the Fe/Cu galvanic effect and the catalytic performance of the copper surface.