PrxZr1-x O2-δ catalyst is prepared through a sol gel method and served for NO catalytic oxidation.The catalyst is modified with polyethylene glycol-2000(PEG-2000)as template agent,and the effect of different template dosages on the catalytic activity of the catalyst in NO oxidation is studied.Results show that the activity of catalyst decreases with the increase of PEG-2000 addition ratio.PrxZr1-x O2-δ has the highest activity when the dosage of PEG-2000 is 2％at 300℃,over which the conversion rate of NO reaches 94.81％.XRD,SEM,N2 adsorption/desorption,XPS and FT-IR are employed to characterize the catalyst.It is shown that the change of template agent dosage does not change the crystal form of Pr2Zr2O7 catalyst.The catalyst has a mesoporous structure,and the largest specific surface area and pore volume when the dosage of template agent is 2％,which is conducive to catalytic oxidation of NO.In addition,the higher content of template agent can enhance the hydrophilicity of the catalyst.
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