燃料化学学报2018，Vol.46Issue(5)：569-577,9.
碳球为模板水热合成Mg-Co复合氧化物及其催化分解N2O
Catalytic decomposition of N2O over Mg-Co composite oxides hydrothermally prepared by using carbon sphere as template
摘要
Abstract
MgCo2O4composite oxides with spinel structure were hydrothermally prepared at 120 ℃ by using carbon sphere as template and urea as precipitant. K2CO3solution was impregnated on MgCo2O4and the K-modified catalyst was obtained. These catalysts were applied in catalytic decomposition of N2O and characterized by X-ray diffraction(XRD), nitrogen physisorption, scanning electron microscopy (SEM), temperature-programmed reduction of hydrogen (H2-TPR), temperature-programmed desorption of oxygen (O2-TPD),and X-ray photoelectron spectroscopy (XPS). Effect of catalysts preparation parameters such as mass ratio of cobalt and magnesium to carbon sphere, molar ratio of urea to metallic cations, on their catalytic activity was investigated. It is shown that the catalyst prepared with mass ratio 0.192 of cobalt and magnesium to carbon sphere,molar ratio 2 of urea to cobalt and magnesium cations, exhibits higher catalytic activity than others. Furthermore, 91% and 62% conversions of N2O could be reached over 0.02 K/MgCo2O4catalyst at 400℃ after continuous running for 50 h under the atmosphere of oxygen-alone and oxygen-steam together, respectively, revealing that K-modified MgCo2O4catalyst is stable under both reaction atmospheres.关键词
N2O催化分解/Mg-Co复合氧化物/K改性催化剂/催化活性Key words
catalytic decomposition of N2O/Mg-Co composite oxides/K-modified catalyst/catalytic activity分类
化学引用本文复制引用
郑丽,李和健,徐秀峰..碳球为模板水热合成Mg-Co复合氧化物及其催化分解N2O[J].燃料化学学报,2018,46(5):569-577,9.基金项目
The project was supported by the Shandong Provincial Natural Science Foundation(ZR2017MB020)and Graduate Innovation Foundation of Yantai University(GIFYTU). （ZR2017MB020）
