掺氮石墨烯-铜基催化剂的制备及催化性能

Preparation and Catalytic Properties of Nitrogen Doped Graphene/Copper-Based Catalyst

采用水热法合成掺氮石墨烯(N/GN),通过超声辅助等体积浸渍法制备掺氮石墨烯-铜基催化剂(Cu-N/GN)。通过XRD、SEM、TEM、N2吸附脱附、XPS和XAES对催化剂的微观结构、形貌及元素组成进行表征,并考察Cu-N/GN对乙炔氢氯化反应的催化性能。结果表明:在催化剂中铜颗粒尺寸较小、均匀分布于N/GN片层上,且铜含量较低(3.6%);Cu-N/GN对乙炔氢氯化反应的催化效果良好,乙炔转化率为68%,氯乙烯选择性为99%。

Nitrogen doped graphene(N/GN)and nitrogen doped graphene/copper-based catalyst(Cu-N/GN)were fabricated by hydrothermal treatment and ultrasonic-assisted equal volume impregnation method,respectively.The microstructure,morphology and elemental composition of Cu-N/GN catalyst were respectively characterized by XRD,SEM,TEM,N2 adsorption-desorption,XPS and XAES.The catalytic performance of Cu-N/GN toward acetylene hydrochlorination was investigated.The results shown that the size of Cu particles is small and Cu species uniform distribution loading N/GN sheets with relatively low amount of Cu(3.6%)in the catalyst.The Cu-N/GN catalyst exhibits good catalytic activity for the acetylene hydrochlorination,and its acetylene conversion and vinyl chloride selectivity are about 68%and 99%,respectively.