摘要
采用不同处理方法对碳纳米管进行预处理,后通过超声浸渍法制备得到新型的催化剂:以碳纳米管为载体,将不同含量的活性金属Ni担载于碳纳米管内外管壁而制得催化剂.后采用氢气程序升温还原(H2-TPR)和透射电镜(TEM)等表征技术对制得催化剂的表面形貌、还原性能等进行考察,并将催化剂样品用于CO2甲烷化反应中考察催化剂的催化性能.实验结果显示,催化剂金属Ni内担载在管内后,Ni的还原度和分散度有了提高,明显地提高了催化剂还原性能和催化性能.
In this experiment, nickel( Ni )was supported on either interior or exterior surface of carbon nanotubes (CNTs)by im- pregnation method to study the effects of catalytic site positions on the conversion of CO2. The catalysts with different Ni loadings were characterized by hydrogen temperature -programmed reduction( H2 -TPR)and transmission electron microscopy(TEM). It was found that the encapsulation of Ni particles inside the CNT channels improves the reducibility of Ni and decreases the leaching of catalytic sites ,which could be the reasons behind the enhanced catalytic performance of Ru - in - CNTs catalyst.
出处
《西南民族大学学报(自然科学版)》
CAS
2015年第4期457-461,共5页
Journal of Southwest Minzu University(Natural Science Edition)
基金
西南民族大学中央高校基本科研业务费专项资金资助(2014NZYQN20)
四川省教育厅项目(15ZB0481)
关键词
碳纳米管
限域效应
催化剂
镍金属
carbon nanotube
confinement effect
catalyst
nickel metal