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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:女
毕业院校:中科院大连化学物理研究所
学位:博士
所在单位:环境学院
学科:环境科学与工程. 环境工程. 环境科学
办公地点:环境楼B511
电子邮箱:quzhenping@dlut.edu.cn
Selective catalytic oxidation of ammonia to nitrogen over MnO2 prepared by urea-assisted hydrothermal method
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论文类型:期刊论文
发表时间:2015-10-01
发表刊物:APPLIED SURFACE SCIENCE
收录刊物:SCIE、EI
卷号:351
页面范围:573-579
ISSN号:0169-4332
关键字:Urea-assisted hydrothermal method; MnO2; Microcrystal; NH3-SCO
摘要:Selective catalytic oxidation of ammonia was studied over MnO2 catalysts synthesized by urea-assisted and tranditional hydrothermal method. A contrastive research was also made to a commercial MnO2 catalyst. The catalytic performance of MnO2 for NH3-SCO was found to be connected with the properties of the catalysts which were obviously determined by the preparation methods. The best catalytic activity was achieved at 170 degrees C over the MnO2 synthesized by urea-assisted hydrothermal method. The properties of catalysts were characterized by BET, XRD, SEM, XPS, H-2-TPR and NH3-TPD techniques. And it was found that MnO2 prepared by urea-assisted synthetic method showed larger surface area and lower reduction temperature. Abundant NH3 adsorption sites and oxygen vacancies were formed on its surface compared to the other catalysts, which evidently enhanced the catalytic performance for NH3 selective oxidation. (C) 2015 Elsevier B.V. All rights reserved.