The catalytic oxidation of toluene was investigated over CeO₂-MnO_x catalysts with the different cerium sources. The CeO₂-MnO_x catalyst synthesized by ceric ammonium nitrate (marked as Cat-A) possessed the superior catalytic performance among the samples. Notably, the synergistic effect between CeO₂ and MnO_x could provide more amounts of oxygen vacancy, the highest concentration of Mn³⁺ and the highest Ce³⁺ contents, which resulted in the outstanding oxygen mobility, causing the improvement of catalytic activity. In brief, the catalytic performance of CeO₂-MnO_x was closely related to the different modulation cerium sources during the preparation process.

在铈源不同的CeO ₂ -MnO _x催化剂上研究了甲苯的催化氧化。硝酸铈铵合成的CeO ₂ -MnO _x催化剂（标记为Cat-A）在样品中具有优异的催化性能。值得注意的是，CeO ₂和MnO _x之间的协同作用可以提供更多的氧空位，最高的Mn ³⁺浓度和最高的Ce ³⁺含量，从而导致出色的氧迁移率，从而提高了催化活性。简而言之，CeO ₂ -MnO _x的催化性能 在制备过程中与不同的调制铈源密切相关。