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Catalytic oxidation of NO into NO_2 is a promising method for NO_x emission control.The aim of this study was to develop an economic and environmental-friendly catalyst for NO catalytic oxidation.Herein a CeFeO_x complex oxide catalyst for catalytic oxidation of NO was prepared by coprecipitation method.After that the catalytic performance of this catalyst was measured on a fixed-bed reactor.It was found that the intrinsic activity of CeFeO_x was higher than that of CeO_x and FeO_x.The characterization techniques of Brumauer-Emmett-Teller(BET),X-ray diffraction(XRD),temperature programmed reduction with H_2(H_2-TPR),temperature programmed desorption with NO+O_2(NO+O_2-TPD) and X-ray photoelectron spectroscopy(XPS) were performed to investigate the surface area,crystal structure,redox property and NO_x adsorption behavior of the catalyst samples.From the characterization results,it was concluded that the low crystallinity of CeFeO_x promoted the dispersion of active species,as a result,enhancing the redox ability and NO adsorption capacity of CeFeO_x catalyst,which is favorable to NO catalytic oxidation.Furthermore,the presence of much chemisorbed oxygen on CeFeO_x catalyst also made a great contribution to its good catalytic performance.
Catalytic oxidation of NO into NO 2 is a promising method for NO x emission control. AIM of this study was to develop an economic and environmental-friendly catalyst for NO catalytic oxidation. Herein a CeFeO x complex oxide catalyst for catalytic oxidation of NO was prepared by coprecipitation method. After that the catalytic performance of this catalyst was measured on a fixed-bed reactor. It was found that the intrinsic activity of CeFeO x was higher than that of CeO x and FeO x. The characterization techniques of Brumauer-Emmett-Teller (BET), X-ray diffraction (XRD), temperature programmed reduction with H_2 (H_2-TPR), temperature programmed desorption with NO + O_2 (NO + O_2-TPD) and X-ray photoelectron spectroscopy (XPS) were performed to investigate the surface area. crystal structure, redox property and NO_x adsorption behavior of the catalyst samples. From the characterization results, it was concluded that the low crystallinity of CeFeO_x promoted the dispersion of active species, as a result, enhancing the redox ability and NO adsorption capacity of CeFeOx catalyst, which is favorable to NO catalytic oxidation. Still further, the presence of much chemisorbed oxygen on CeFeOx catalyst also makes a great contribution to its good catalytic performance.