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《Journal of Functional Materials》 2011-09
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The effects of Ag-doped to the Ag-V/TiO_2 catalysts with low vanadium loadings for DeNO_x

WANG Zai-hua1,2,LI Xin-jun1,SONG Wen-ji1,CHEN Jin-fa1,LI Tao1,FENG Zi-ping1(1.Key Laboratory of Renewable Energy and Gas Hydrate,Chinese Academy of Sciences Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China; 2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China)  
A series of Ag-doped Ag-V/TiO2 catalysts with low vanadium loadings were prepared by the sol-gel methods for selective catalytic reduction(SCR) of NOx with ammonia as reductant,using tetrabutyl titanate,ammonium metavanadate and silver nitrate as raw materials.The catalysts were characterized by X-ray powder diffraction(XRD),X-ray photoelectron spectra(XPS),temperature programmed reduction(TPR),Thermogravimetry-mass spectrometry(TG-MS) and Fourier transform infrared spectroscopy(FT-IR).The activity was also investigated.The results showed that the low temperature activity improved and the high temperature activity increased firstly and then decreased with the increasing of Ag amounts.The durability of the catalysts was good.Silver doping inhibited the growth of crystal size,reduced the activation energy of surface oxygen,the bond energy of VO and the reduction temperature of vanadium oxides.
【Fund】: 中国科学院所长创新基金资助项目(0907r9)
【CateGory Index】: X701
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