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中文摘要：
通过X射线衍射和程序升温还原技术对Ce1-xZrxO2（0≤x≤1）催化剂的结构和氧化还原性能进行了研究，同时考察了Ce1-xZrxO2催化剂在CO2重整CH4反应中的催化性能，并与其氧化还原性能进行了关联，结果表明，当x≤0．25时，Ce1-xZrxO2以立方相Ce-Zr-O固溶体形式存在，氧化还原性随着Zr含量的增加而增加；当x〉0．25时，以四方ZrO2相和立方相Ce-Zr-O固溶体的混合相存在，氧化还原性随着Zr含量的增加而减弱,Ce0.75Zr0.25O2具有最高的氧化还原性，Ce1-xZrxO2对CO2重整CH4反应的催化活性依赖于其氧化还原性，催化剂的氧化还原性越强，反应物（CO2和CH4）的转化率越高，催化剂的稳定性也越好．氧化还原性能最强的Ce0.75Zr0.25O2催化剂表现出最高的催化活性、抗积炭能力和稳定性．
英文摘要：
The structure and redox properties of Ce1-xZrxO2 （0≤x≤1） were characterized by X-ray diffraction （XRD） and H2 temperature-programmed reduction （H2-TPR）. The catalytic performance of the Ce1-xZrxO2 catalysts for CO2 reforming of CH4 was investigated at 700-850℃. The results of XRD and TPR showed that the samples existed as a cubic Ce-Zr-O solid solution and their reducibility increased with increasing Zr content when x≤0.25; while a tetragonal ZrO2 phase mixed with a cubic Ce-Zr-O solid solution was detected for samples with x 〉0.25 and the overall reducibility of the mixed phases decreased with increasing Zr content. Thus, the sample with x=0.25, Ce0.75Zr0.25O2, showed the highest reducibility. The catalytic performance of the Ce1-xZrxO2 catalysts was closely related to their reducibility. The Ce0.75 Zr0.25O2 catalyst with the highest reducibility also showed the highest catalytic activity and stability for the reforming of CH4 with CO2.
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