title: Pt-Au/MOx-CeO₂ (M = Mn, Fe, Ti) Catalysts for the Co-Oxidation of CO and H₂ at Room Temperature.
abstract: A series of nanostructured Pt-Au/MOx-CeO₂ (M = Mn, Fe, Ti) catalysts were prepared and their catalytic performance for the co-oxidation of carbon monoxide (CO) and hydrogen (H₂) were evaluated at room temperature. The results showed that MOxpromoted the CO oxidation of Pt-Au/CeO₂, but only the TiO₂ could enhance co-oxidation of CO and H₂ over Pt-Au/CeO₂. Related characterizations were conducted to clarify the promoting effect of MOx. Temperature-programmed reduction of hydrogen (H₂-TPR) and X-ray photoelectron spectroscopy (XPS) results suggested that MOxcould improve the charge transfer from Au sites to CeO₂, resulting in a high concentration of Ce3+and cationic Au species which benefits for the CO oxidation. In-situ diffuse reflectance infrared Fourier transform spectroscopy (In-situ DRIFTS) results indicated that TiO₂ could facilitate the oxidation of H₂ over the Pt-Au/TiO₂-CeO₂ catalyst.
authors.affiliation: School of Space and Environment, Beihang University, Beijing 100191, China. hongxiao86@126.com.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Hong
authors.affiliation: School of Space and Environment, Beihang University, Beijing 100191, China. suny@buaa.edu.cn.
authors.forename: Ye
authors.initials: Y
authors.lastname: Sun
authors.affiliation: School of Space and Environment, Beihang University, Beijing 100191, China. zhutl@buaa.edu.cn.
authors.forename: Tianle
authors.initials: T
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China. liuzm@mail.buct.edu.cn.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Liu
mesh_terms: D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D017895:Manganese Compounds; D010087:Oxides; C009495:titanium dioxide; C000499:ferric oxide; D002563:Cerium; D010984:Platinum; C030583:ceric oxide; C027424:manganese oxide; D006046:Gold; D002248:Carbon Monoxide; D006859:Hydrogen; D014025:Titanium
keywords: CO; Co-oxidation; H2; Pt-Au/MOx-CeO2; Room temperature