物理化学学报2017，Vol.33Issue(9)：1855-1864,10.DOI:10.3866/PKU.WHXB201704282
OL负载Cu催化剂及其催化氧化CO及乙酸乙酯性能
Cu-Doped Octahedral Layered Birnessites Catalysts for the Catalytic Oxidation of CO and Ethyl Acetate
摘要
Abstract
Octahedral layered bimessite (denoted as OL) was synthesized by the oxidation-reduction method and a series of Cux/OL catalysts were prepared by the ion exchange method with various Cu loadings.The materials were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),N2 adsorption-desorption,hydrogen temperature-programmed reduction (H2-TPR),X-ray photoelectron spectroscopy (XPS),thermogravimetric (TG) and.oxygen temperature-programmed desorption (O2-TPD) techniques,and their catalytic activities for CO and ethyl acetate oxidation were evaluated.The results show that OL is a typical octahedral layered structure,and the doping of Cu hardly affects the structure of OL.Moreover,Cux/OL samples had different reducibility,oxygen mobility,and atomic ratio of Cu2+/CuO,(Mn2+ + Mn3+)/Mn4+,and Oads/Olatt after the addition of Cu to OL.Among the Cux/OL samples,the Cu5/OL sample showed the best activity for the catalytic oxidation of CO and ethyl acetate (T50 =70 and T90 =100 ℃ for CO oxidation;Ts0 =160 ℃ and T90 =200 ℃ for ethyl acetate oxidation).Cu5/OL showed the best reducibility,most isolated Cu2+ species,highest surface (Mn2+ + Mn3+)/Mn4+ atomic ratio,highest chemisorbed oxygen species,and lowest O2 desorption temperature.Hence,factors such as the strong interaction between copper and manganese,good reducibility,and oxygen mobility were responsible for the excellent catalytic activity of Cus/OL.关键词
层状锰氧化物/Cux/OL/一氧化碳/乙酸乙酯/催化氧化Key words
Octahedral layered birnessite/Cux/OL/Carbon monoxide/Ethyl acetate/Catalytic oxidation分类
化学化工引用本文复制引用
傅之丹,臧佳欣,叶青,程水源,康天放..OL负载Cu催化剂及其催化氧化CO及乙酸乙酯性能[J].物理化学学报,2017,33(9):1855-1864,10.基金项目
The project was supported by the National Natural Science Foundation of China (21277008,20777005) and Natural Science Foundation of Beijing,China (8082008) and Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality (IDHT20140504)国家自然科学基金(21277008,20777005),北京市自然科学基金(8082008)和北京市教委教师队伍建设(IDHT20140504)资助项目 （21277008,20777005）
