CeO2-TiO2 Mixed Oxides Catalysts for Selective Catalytic Reduction of NOx with NH3: Structure-properties Relationships

作者：孙向丽; 何洪; 苏垚超; 闫京芳; 宋丽云; 邱文革

来源：高等学校化学学报, 2017, 38(5).

DOI：10.7503/cjcu20160875

• Selective catalytic reduction
• CeO2-TiO2 mixed oxide
• NOx
• Crystal structure

A series of CeO2-TiO2 mixed oxides catalysts prepared by Co-precipitation method was investigated on selective catalytic reduction(SCR) of NOx with NH3.The properties of the catalysts were characterized using XRD, BET, XRF, XPS, H2-TPR, NH3-TPD and NO+O2-TPD techniques.The results indicated that the crystal structure, crystallite size and catalytic NH3-SCR activity over the catalysts presented a regular change with the increase of CeO2 concentration.Particularly, the 50CeTi catalyst with amorphous structure of CeO2-TiO2 showed a higher BET surface area and a stronger surface acidity than other samples.Meanwhile, favorable Ce3+ and the surface adsorbed oxygen benefited the adsorption of NOx and NH3 molecules, which enhanced DeNOx performance.

• 单位
  北京工业大学