摘要
采用溶液燃烧法和浸渍法制备了铜铁矿结构的钴酸锂(LiCoO2)及其负载K的系列催化剂样品,并通过XRD、NOx-TPD、H2-TPR、程序升温反应等对其进行了结构表征与性能评价.结果表明LiCoO2是一种能有效同时去除碳烟(PM)和NOx的催化剂;K负载可提高其催化活性,其中10%K/LiCoO2具有最低的PM起燃温度(246℃)和最大NOx→N2转化率(35.9%);催化剂表面生成的O2-/O-活性氧物种以及较强的NOx吸附存储能力可能是K/LiCoO2催化活性提高的原因.
LiCoO2 and potassium loading LiCoO2 catalyst were prepared by solution combustion method and subse- quent dipping method. The prepared catalysts were characterized by XRD, NOx-TPD, H2-TPR and the catalytic activity of the catalysts were evaluated by temperature programmed reaction. It is showed that LiCoO2 is an effective catalyst for simultaneous removal of PM and NOx. Loading potassium could improve the catalytic activity, 10% K/ LiCoO2 had minimum light-off temperature （246 ℃ ） and maximum conversion of NOx to N2 （35.94%）. A large number of 02/0. active oxygen species on catalyst surface and the improved NOx adsorption storage capacity of the catalyst might be the reason for the higher catalytic activity of K/LiCoO2
出处
《分子催化》
EI
CAS
CSCD
北大核心
2013年第1期49-54,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(20807027)
