期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Catalytic performance of Zr-doped CuO-CeO2 oxides for CO selective oxidation in H2-rich stream 被引量:8
1
作者 Limin Shi chuanlei gao +2 位作者 Fenghai Guo Yujing Wang Tiebang Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2019年第7期720-725,共6页
Zr-doped CuO-CeO2 catalysts for CO selective oxidation were designed and prepared by the hydrothermal method and coprecipitation. The experimental samples were characterized by means of N2 adsorption-desorption isothe... Zr-doped CuO-CeO2 catalysts for CO selective oxidation were designed and prepared by the hydrothermal method and coprecipitation. The experimental samples were characterized by means of N2 adsorption-desorption isotherms, powder X-ray diffraction, temperature-programmed reduction and Xray photoelectron spectroscopy. It is observed that the catalyst prepared by hydrothermal method exhibits larger specific surface area, smaller crystalline size and higher dispersion of active components compared with those of the catalyst obtained by coprecipitation. Meanwhile, redox properties of copper oxide are improved significantly and highly dispersed copper species providing CO oxidation sites are present on the surface. Furthermore, adsorptive centers of CO and active oxygen species increase on the copper-ceria interfaces. The Zr-doped CuO-CeO2 catalyst prepared by hydrothermal method possesses superior catalytic activity and selectivity for selective oxidation of CO at low temperature compared with those of the sample prepared by coprecipitation. The temperature corresponding to 50% CO conversion is only 73 ℃ and the temperature span of total CO conversion is expanded from 120 to 160 ℃. 展开更多
关键词 CATALYTIC performance CuO-CeO2 OXIDES ZR doping CO selective oxidation Hydrogen PURIFICATION RARE earths
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部