%0 Journal Article
%T Preparation and Characterization of Eggshell-shaped CuO/ZnO/SiO2 Particulate Catalysts Modified with Ce<br>Ce掺杂的蛋壳型CuO/ZnO/SiO2颗粒催化剂的制备和表征
%A XIA Zeng-min
%A WEN Li-xiong
%A SONG Ji-rui
%A CHEN Jian-feng
%A <br>夏增敏
%A 文利雄
%A 宋继瑞
%A 陈建峰
%J 过程工程学报
%D 2007
%I 
%X Eggshell-shaped CuO/ZnO/SiO2 and CuO/ZnO/Ce/SiO2 particulate catalysts supported with porous hollow SiO2 nanoparticles were prepared by a two-step precipitation method combined with addition of surfactant. The catalytic performances of the prepared catalysts for methanol synthesis from CO hydrogenation were investigated, and the catalyst structure was characterized by TEM, BET, XRD and XPS techniques. The results showed that the catalysts supported with porous hollow SiO2 nanoparticles had large specific surface areas, and the CuO and ZnO particles with an average size of about 13 nm were well dispersed on the support. The Ce promoter could improve the catalytic activity and the selectivity of methanol significantly, probably by two reasons: (1) Ce could lower the binding energy of Cu 2p3/2 and Zn 2p3/2, thus facilitating the reduction of CuO to Cu by hydrogen, and (2) the presence of Ce might enhance the interaction between Cu and Zn, and hence improved the dispersion of active components by preventing Cu particles from aggregating.
%K eggshell-shaped
%K CuO/ZnO/SiO2 particulate catalyst
%K methanol synthesis
%K SiO2 nanoparticles
%K Ce<br>蛋壳型
%K CuO/ZnO/SiO2颗粒催化剂
%K 甲醇合成
%K 纳米SiO2
%K Ce
%K 掺杂剂
%K 蛋壳型
%K 颗粒催化剂
%K 表征
%K Characterization
%K Preparation
%K Modified
%K 改善
%K 烧结
%K 粒子
%K 相互作用
%K 铜锌
%K 增强
%K 氢气还原
%K 氧化铜
%K 表面结合能
%K 选择性
%K 活性成分
%K 粒径
%K 均匀
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=559E3033CE0B1EA83F0FED13163A6A98&yid=A732AF04DDA03BB3&vid=DF92D298D3FF1E6E&iid=E158A972A605785F&sid=525CF7714FCB18E2&eid=43AADF4B53A8BF6F&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=17