Surface species changes over ZrO<sub>2</sub> modified Cu catalysts in the process of reduction and reaction

PEI Su-peng; WU Gui-sheng; MAO Dong-sen

Volume 41 Issue 09

Sep. 2013

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Article Navigation > Journal of Fuel Chemistry and Technology > 2013 > 41(09): 1097-1101

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(09): 1097-1101.

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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(09): 1097-1101.

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

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

Received Date: 2013-01-15
Rev Recd Date: 2013-03-29
Publish Date: 2013-09-30

Abstract

Abstract

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.
- Cu,
- ZrO₂/Cu,
- in-situ Raman,
- surface species

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References(21)

References

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