Indexed by:
Journal Papers
First Author:
Qu, Zhenping
Correspondence Author:
Qu, ZP (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Linggong Rd 2, Dalian 116024, Peoples R China.
Co-author:
Fan, Rui,Wang, Zhong,Wang, Hui,Miao, Lei
Date of Publication:
2015-10-01
Journal:
APPLIED SURFACE SCIENCE
Included Journals:
SCIE、EI
Document Type:
J
Volume:
351
Page Number:
573-579
ISSN No.:
0169-4332
Key Words:
Urea-assisted hydrothermal method; MnO2; Microcrystal; NH3-SCO
Abstract:
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.
Translation or Not:
no
