期刊
NANOSCALE
卷 5, 期 19, 页码 9199-9207出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr02631k
关键词
-
类别
资金
- National Natural Science Foundation of China [51108258]
- Science and Technology Commission of Shanghai Municipality [13NM1401200, 11NM0502200]
- Doctoral Fund of Ministry of Education of China [20123108120018]
- Shanghai First-Class Discipline Construction in Colleges and Universities
- STCSM postdoctoral foundation [12R21413300]
Nanoflaky MnOx on carbon nanotubes (nf-MnOx@CNTs) was in situ synthesized by a facile chemical bath deposition route for low-temperature selective catalytic reduction (SCR) of NO with NH3. This catalyst was mainly characterized by the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), N-2 adsorption-desorption analysis, X-ray photoelectron spectroscopy (XPS), H-2 temperature-programmed reduction (H-2-TPR) and NH3 temperature-programmed desorption (NH3-TPD). The SEM, TEM, XRD results and N-2 adsorption-desorption analysis indicated that the CNTs were surrounded by nanoflaky MnOx and the obtained catalyst exhibited a large surface area as well. Compared with the MnOx/CNT and MnOx/TiO2 catalysts prepared by an impregnation method, the nf-MnOx@CNTs presented better NH3-SCR activity at low temperature and a more extensive operating temperature window. The XPS results showed that a higher atomic concentration of Mn4+ and more chemisorbed oxygen species existed on the surface of CNTs for nf-MnOx@CNTs. The H-2-TPR and NH3-TPD results demonstrated that the nf-MnOx@CNTs possessed stronger reducing ability, more acid sites and stronger acid strength than the other two catalysts. Based on the above mentioned favourable properties, the nf-MnOx@CNT catalyst has an excellent performance in the low-temperature SCR of NO to N-2 with NH3. In addition, the nf-MnOx@CNT catalyst also presented favourable stability and H2O resistance.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据