期刊
JOURNAL OF RARE EARTHS
卷 30, 期 5, 页码 431-436出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(12)60067-2
关键词
synergetic catalysis; interaction between ceria and titania; selective catalytic reduction; NO conversion; rare earths
资金
- National Natural Science Foundation of China [21106071, 50872052]
- National High-Tech Research and Development Program of China (863 Program) [2009AA05Z313]
- New Teachers' Fund for Doctor Stations the Ministry of Education of China [20113221120004]
- Research Subject of Environmental Protection Department of Jiangsu Province of China [201016]
The promotional effect of the interaction between titania and ceria on the catalytic performance for selective reduction of NO was studied. The catalysts, CeO2, TiO2, CeO2/TiO2 and TixCe1-xO2, were synthesized and tested in NH3-Selective catalytic reduction (SCR) of NO, and the samples were characterized by the Brunaller, Emmett and Teller (BET absorbed gas N-2), X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and temperature programmed desorption (TPD NH3) techniques. The improvement mechanism of the interaction between the titania and ceria had been explored and discussed from two aspects of micro-structure and surface acidity. The interaction between the titania and ceria greatly improved the catalytic activity but had little effect on the active temperature. It was first reported that the acid amount determined the catalytic activity and the acid strength determined the active temperature for NH3-SCR of NO.
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