Pt/MOx/SiO2, Pt/MOx/TiO2, and Pt/MOx/Al2O3 Catalysts for CO Oxidation

Catalysts

Hongmei Qin²  Xiaoshuang Qian²  Tao Meng²  Yi Lin²  Zhen Ma¹ 

[1]Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP³), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China

关键词: Pt catalysts;    cobalt oxide;    CO oxidation;   

DOI  :  10.3390/catal5020606

来源: mdpi

【 摘 要 】

Conventional supported Pt catalysts have often been prepared by loading Pt onto commercial supports, such as SiO₂, TiO₂, Al₂O₃, and carbon. These catalysts usually have simple metal-support (i.e., Pt-SiO₂) interfaces. To tune the catalytic performance of supported Pt catalysts, it is desirable to modify the metal-support interfaces by incorporating an oxide additive into the catalyst formula. Here we prepared three series of metal oxide-modified Pt catalysts (i.e., Pt/MO_x/SiO₂, Pt/MO_x/TiO₂, and Pt/MO_x/Al₂O₃, where M = Al, Fe, Co, Cu, Zn, Ba, La) for CO oxidation. Among them, Pt/CoO_x/SiO₂, Pt/CoO_x/TiO₂, and Pt/CoO_x/Al₂O₃ showed the highest catalytic activities. Relevant samples were characterized by N₂ adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), H₂ temperature-programmed reduction (H₂-TPR), X-ray photoelectron spectroscopy (XPS), CO temperature-programmed desorption (CO-TPD), O₂ temperature-programmed desorption (O₂-TPD), and CO₂ temperature-programmed desorption (CO₂-TPD).

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.