title: In situ characterization of Cu-Co oxides for catalytic application.
abstract: In situ emission and absorption FTIR methods were employed to characterize the spatially resolved structure of binary Co-Cu oxides for low-temperature oxidation of CO and propene. Co-Cu oxide catalysts were controllably synthesized by pulsed-spray evaporation chemical vapor deposition. XRD, FTIR, XPS, UV-vis and helium ion microscopy (HIM) were employed to characterize the as-prepared thin films in terms of structure, composition, optical and thermal properties as well as morphology. In situ emission FTIR spectroscopy indicates that Co3O4, CuCo2O4 and CuO are thermally stable at 650, 655 and 450 °C, respectively. The catalytic tests with absorption FTIR display that the involvement of Co-Cu oxides can initiate CO and C3H6 oxidation at lower temperatures. The results indicate that in situ emission and absorption FTIR are useful techniques to explore the thermal properties and catalytic performance of functional materials, allowing many potential applications in tailoring their temporally and spatially resolved structure-property relationships.
authors.affiliation: Institute of Engineering Thermophysics, Chinese Academy of Sciences, 11 Beisihuanxi Road, Beijing 100190, China. tianzhenyu@iet.cn.|Department of Chemistry, Bielefeld University, Universitätsstraβe. 25, D-33615 Bielefeld, Germany.
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Tian
authors.affiliation: Department of Physics, Bielefeld University, Universitätsstraβe. 25, D-33615 Bielefeld, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Vieker
authors.affiliation: Department of Chemistry, Bielefeld University, Universitätsstraβe. 25, D-33615 Bielefeld, Germany.
authors.forename: P Mountapmbeme
authors.initials: PM
authors.lastname: Kouotou
authors.affiliation: Department of Physics, Bielefeld University, Universitätsstraβe. 25, D-33615 Bielefeld, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Beyer
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D013696:Temperature; D014835:Volatilization
chemical_list: D000475:Alkenes; D010087:Oxides; D003035:Cobalt; D003300:Copper; D002248:Carbon Monoxide; C013658:propylene; C060728:cobalt oxide; C030973:cupric oxide