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Citation: PEI Su-peng, WU Gui-sheng, MAO Dong-sen. Surface species changes over ZrO2 modified Cu catalysts in the process of reduction and reaction[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(9): 1097-1101. shu

Surface species changes over ZrO2 modified Cu catalysts in the process of reduction and reaction

  • 1.

    Research Institute of Applied Catalysis, Academy of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China

  • Corresponding author: WU Gui-sheng, 
  • Received Date: 15 January 2013
    Available Online: 29 March 2013

    Fund Project: 上海重点学科基金(J51503) (J51503)上海市分子催化和功能材料重点实验室基金(2009KF06)。 (2009KF06)

  • Cu model catalyst was prepared through thermal decomposition method and ZrO2/Cu was obtained through impregnation method. The morphology and surface composition of the catalysts were investigated using SEM and XPS. Surface specie changes over Cu and ZrO2/Cu in the process of the reduction were investigated using in-situ Raman. In the mean time, CO and H2O were passed through in sequence, and the Raman spectra were recorded. The results show that surface of Cu mainly consists of CuO species while that of ZrO2/Cu contains rich surface hydroxyl groups besides CuO species. ZrO2/Cu is easier to be reduced to CuO with ZrO2 species agglomerating to floccus state. However, Cu2O formed over Cu catalysts after reduction. CO adsorption over Cu produces Cu-CO with the disappearance of Cu2O and production of CO2. Water is weakly adsorbed over Cu but is adsorbed strongly over ZrO2/Cu to produce Cu2O species via Cu-OH intermediate.
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