Preparation of Al2O3–CeO2 by Hydrothermal Method Supporting Copper Oxide for the Catalytic Oxidation of CO and C3H8

• DOI: 10.1021/acs.iecr.1c03906
• Publication Date: 2022-04-01T16:00:51Z
• Authors: Fan Li; Bing Zhao; Yifeng Tan; Wenlin Chen; Mengkui Tian
• Keywords: Copper oxide

A series of Al2O3–CeO2 carriers were synthesized by hydrothermal method, and CuO/Al2O3–CeO2 catalysts prepared ultrasound-assisted impregnation for the catalytic oxidation CO C3H8. These samples have been characterized XRD, BET, TEM, XPS, other techniques. The 15 wt % CuO/A1C1 catalyst exhibited best activity, light-off temperatures (T50) C3H8 67 325 °C, respectively. XRD results showed that dispersion CuO on surface was improved introduction CeO2 into CuO/Al2O3 catalyst. Besides, with addition content, specific area pore volume sample gradually decrease. XPS suggest synergistic effect (Ce3+ + Cu2+ ↔ Ce4+ Cu+) is conducive to generation oxygen vacancies improves activity Both H2-TPR O2-TPD shift toward lower temperatures, indicating redox reactions are more likely occur. Finally, based in situ DRIFTS, Cu+ species obtained from reduction play a crucial role