CeO_2改性对CuO/SBA-15催化剂结构及其催化活性的影响  

Effect of CeO_2 Addition on the Structure and Activity of SBA-15-Supported CuO

作　　者：张洪亮[1,2] 汤常金[2] 高飞[3] 董林[2,3] 

机构地区：[1]安徽工业大学现代分析测试中心,安徽马鞍山243002 [2]南京大学化学化工学院,江苏南京210093 [3]南京大学现代分析中心,江苏南京210093

出　　处：《安徽工业大学学报（自然科学版）》2014年第1期51-56,共6页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金项目(20973091;21307001);安徽工业大学校青年基金(QZ201322)

摘　　要：采用浸渍法在Ce-SBA-15载体上负载活性组分CuO,制备一系列不同配比的CuO/Ce-SBA-15催化剂,运用XRD、TEM、N2吸附、TPR、CO-IR等手段考察催化剂CuO/Ce-SBA-15的物理化学性质,并对其进行CO氧化催化活性的测试。活性测试结果表明,CeO2对SBA-15载体的改性有效地提高了CuO/SBA-15催化剂在CO氧化反应中的催化活性。XRD结果表明:CeO2对SBA-15载体的改性可以促进氧化铜在载体表面的分散;进一步结合H2-TPR、CO-IR表征结果,CeO2促进了CuO在载体表面的还原,这些都有利于催化活性的提高。A series of CuO/Ce-SBA-15 catalysts were prepared by impregnation and characterized with XRD, TEM, N2-adsorption, TPR, CO-IR and activity test for oxidation of carbon monoxide. The model reaction of CO＋ O5 tests showed that modification of SBA-15 by CeO2 promoted the activity of CuO/SBA-15 catalysts. XRD results show that dispersion of copper oxides is promoted after the modification by CeO2. Furthermore, H2-TPR and CO-IR results reveal that the reducibility of copper oxides species is increased, in good line with the activities of catalysts.

关 键 词：CUO Ce-SBA-15 分散 还原 

分 类 号：O643.3[理学—物理化学]