組分含量對CuO-ZnO-ZrO<sub>2</sub>催化CO氧化性能的影響

組分含量對CuO-ZnO-ZrO₂催化CO氧化性能的影響

摘要: 采用共沉澱法製備CuO-ZnO-ZrO₂催化劑, 考察CuO質量分數及ZnO:ZrO₂質量比對CuO-ZnO-ZrO₂催化劑結構及物化性能的影響.采用X射線衍射(XRD)👰‍♀️、比表面及孔徑分析(BET)、氫氣程序升溫還原(H₂-TPR)、X射線光電子能譜(XPS)等方法表征CuO-ZnO-ZrO₂催化劑.結果表明🍜：當CuO質量分數為70%, ZnO:ZrO₂質量比為1:1時, CuO-ZnO-ZrO₂催化劑具有較大的比表面積和孔容積, 較好的分散度, 較小的晶粒尺寸, 以及較好的氧化還原性能, 在催化CO氧化反應中表現出較優的活性, 在常壓、373K反應溫度下, CO轉化率達到75%, 並且連續反應22h, 穩定性能良好.

Abstract: CuO-ZnO-ZrO₂ catalyst was prepared by co-precipitation method and characterized by XRD, BET, H₂-TPR and XPS techniques. The influence of component content including CuO mass fraction and the mass ratio of ZnO and ZrO₂ was investigated. The results of characterization revealed that when CuO mass fraction was 70% and mass ratio of ZnO and ZrO₂ was 1:1, CuO-ZnO-ZrO₂ catalyst showed a larger surface area and pore volume, a higher dispersion of CuO particles with a smaller partical size and better reduction property, thus it exhibited the high catalytic performance in the carbon monoxide oxidation, and under the conditions of 373 K and atmospheric pressure, the CO conversion could reach 75% with good stability of 22 h.