Abstract Herein, we present a ligand-assist induction self-assembly method to prepare mesoporous CeO2 (mCeO2) nanospheres. Then, a series of mCeO2 catalysts with Ni or Co ions doped with various Ce/Ni (Co) ratios were prepared by this method. These mCeO2:xNi/Co (mCeO2 with different mound Ni or Co ions doping) samples were studied using a range of characterization techniques (XRD, N2 adsorption-desorption, SEM, TEM, XPS, H2-TPR, O2-TPD and Raman spectroscopy). Both mCeO2 and mCeO2:xNi/Co nanospheres show high surface areas. XPS spectra reveal that the ratios of Ce3+/Ce4+ increase as the doping concentration of Ni/Co ions increasing, which indicated that mCeO2:xNi/Co samples are more reducible than pure mCeO2. The H2-TPR, O2-TPD, and Raman analysis results reveal that the doping of Ni or Co ions significantly increased the concentration of surface oxygen vacancies in mCeO2. As for ethylbenzene oxidation reaction, doping-mesoporous ceria catalysts exhibited a superior catalytic activity when compared to pure mesoporous ceria catalysts prepared by the same method.

中文翻译：

---

具有定制氧空位的掺杂介孔二氧化铈增强乙苯氧化应用活性的研究

摘要 在此，我们提出了一种配体辅助诱导自组装方法来制备介孔 CeO2 (mCeO2) 纳米球。然后，通过该方法制备了一系列以不同Ce/Ni(Co)比掺杂Ni或Co离子的mCeO2催化剂。使用一系列表征技术（XRD、N2 吸附-解吸、SEM、TEM、XPS、H2-TPR、O2-TPD 和拉曼光谱）研究了这些 mCeO2:xNi/Co（具有不同堆 Ni 或 Co 离子掺杂的 mCeO2）样品）。mCeO2 和 mCeO2:xNi/Co 纳米球都显示出高表面积。XPS 光谱显示，随着 Ni/Co 离子掺杂浓度的增加，Ce3+/Ce4+ 的比率增加，这表明 mCeO2:xNi/Co 样品比纯 mCeO2 样品更易还原。H2-TPR、O2-TPD、和拉曼分析结果表明，Ni 或 Co 离子的掺杂显着增加了 mCeO2 中表面氧空位的浓度。对于乙苯氧化反应，与相同方法制备的纯介孔氧化铈催化剂相比，掺杂介孔氧化铈催化剂表现出优异的催化活性。