The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the cat...The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.展开更多
Nano- sized and well- dispersed Cu- Ni/La2O3 can be obtained by reduction of LaCu0.2Ni0.8O3 with the structure of perovskite. Using Cu- Ni/La2O3 as cata lyst and C2H2 as carbon source, carbon nanotubes with a high yie...Nano- sized and well- dispersed Cu- Ni/La2O3 can be obtained by reduction of LaCu0.2Ni0.8O3 with the structure of perovskite. Using Cu- Ni/La2O3 as cata lyst and C2H2 as carbon source, carbon nanotubes with a high yield and narrow di ameter distribution can be obtained in the reaction temperature range of 650～ 7 00℃ . Outer diameter of carbon nanotubes rangs from 9nm to 14nm. TG, Raman and XPS analysis indicate that carbon nanotubes prepared by Cu- Ni/La2O3 are relati vely higher in graphitic degree.展开更多
文摘The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.
文摘Nano- sized and well- dispersed Cu- Ni/La2O3 can be obtained by reduction of LaCu0.2Ni0.8O3 with the structure of perovskite. Using Cu- Ni/La2O3 as cata lyst and C2H2 as carbon source, carbon nanotubes with a high yield and narrow di ameter distribution can be obtained in the reaction temperature range of 650～ 7 00℃ . Outer diameter of carbon nanotubes rangs from 9nm to 14nm. TG, Raman and XPS analysis indicate that carbon nanotubes prepared by Cu- Ni/La2O3 are relati vely higher in graphitic degree.
