无机材料学报2017，Vol.32Issue(9)：923-930,8.DOI:10.15541/jim20160662
鸟巢状CuCeZrOx三元复合氧化物的合成及其对碳烟颗粒的催化氧化性能研究
Birdnest-like CuCeZr Mixed Oxides: Synthesis and Excellent Catalysts for Diesel Exhaust Oxidation
摘要
Abstract
A series of ternary composite oxides CuCeZrOx calcined at different temperatures were prepared by a ho-mogeneous precipitation method using urea as the precipitant. X-ray diffraction (XRD), N2 adsorption-desorption analysis, X-ray photoelectron spectroscopy (XPS), scanning transmission electron microscope (STEM), and tempera-ture-programmed reduction (or desorption, oxidation) (TPR, TPD or TPO) measurements were utilized to investigate the influence of calcination temperatures on the physicochemical property and catalysis performance towards soot cat-alytic oxidation. The CCZ-350 (calcined at 350℃) sample exhibits the optimized catalysis performance: temperature at the maximum rate of soot oxidation (T50) = 407℃, under test conditions of space velocity = 12000 mL/(gcatalyst·h), c(O2) = 10vol%,c(NO) = 500×10-6, and mass ratio of (loosely contacted) catalyst/soot = 10/1. It is believed that theabundant high-reactive adsorbed oxygen species on CCZ-350 surface contribute much to its outstanding catalysis performance. Besides, CCZ-350 with a loose-packing and porous morphology favors its sufficient contact with soot, thus further benefiting the catatlytic activity towards soot combustion. More importantly, CCZ-350 also presents good water vapor and SO2 resistence performance as well as good capability of eliminating other pollutants in diesel exhaust at low temperatures (150-400℃), such as CO, C3H6 and C3H8.关键词
三元复合氧化物催化剂/CuCeZrOx/碳烟氧化/抗水抗硫性能Key words
ternary composite oxides catalyst/CuCeZrOx/soot oxidation/water vapor and SO2 resistence分类
化学化工引用本文复制引用
赵晗,周晓霞,潘琳钰,陈航榕..鸟巢状CuCeZrOx三元复合氧化物的合成及其对碳烟颗粒的催化氧化性能研究[J].无机材料学报,2017,32(9):923-930,8.基金项目
国家重大科技基础研究发展计划(973)(2013CB933200) （973）
国家杰出青年科学基金(51225202) （51225202）
国家自然科学基金(51502330) National Key Basic Research Program of China (2013CB933200) （51502330）
China National Funds for Distinguished Young Scientists (51225202) （51225202）
National Natural Science Foundation of China (51502330) （51502330）
