Several CeO₂-CuO/Cu₂O nanocomposites with different CuO structures were used to identify the structure sensitivity of CuO in the CeO₂-CuO/Cu₂O catalyzed CO oxidation. The CO oxidation catalyzed by various CuO-CeO₂ interfacial sites involves a typical Mars-van Krevelen mechanism, in which the CuO-CeO₂ interfaces in the CeO₂-CuO/c-Cu₂O (cubes) nanocomposites are more intrinsically active, exhibiting ca. 15 kJ mol⁻¹ lower activation energy than those in the CeO₂-CuO/o-Cu₂O (octahedra) and CeO₂-CuO/d-Cu₂O (rhombic dodecahedra) nanocomposites at CeO₂ loadings no less than 0.75 wt%. The higher activity is relevant to lower coordinated oxygen ions on CuO/c-Cu₂O surface and thus better CO reactivity for the CeO₂-CuO/c-Cu₂O nanocomposites, which therefore indicates that the active oxygen species on CuO-CeO₂ interface should come from CuO rather than CeO₂. Moreover, a highly active 13.2 %CeO₂-CuO/c-Cu₂O(s) catalyst for CO oxidation is realized on fine Cu₂O cubes, which thus has high density of active sites.

使用具有不同CuO结构的几种CeO ₂ -CuO/Cu ₂ O纳米复合材料来鉴定CeO ₂ -CuO/Cu ₂ O催化CO氧化中CuO的结构敏感性。由各种CuO-CeO ₂界面位点催化的CO氧化涉及典型的Mars-van Krevelen机制，其中CeO ₂ -CuO/c-Cu ₂ O（立方体）纳米复合材料中的CuO-CeO ₂界面更具内在活性，展示约 比CeO ₂ -CuO/o-Cu ₂ O（八面体）和CeO ₂ -CuO/d-Cu _{2 中的}活化能低15 kJ mol ^-1O（菱形十二面体）纳米复合材料，CeO ₂负载量不低于 0.75 wt%。较高的活性与 CuO/c-Cu ₂ O 表面上较低的配位氧离子有关，因此 CeO ₂ -CuO/c-Cu ₂ O 纳米复合材料的CO 反应性更好，因此表明 CuO-CeO 上的活性氧物种₂界面应该来自CuO 而不是CeO ₂。此外，在精细的Cu ₂ O立方体上实现了用于CO氧化的高活性13.2 %CeO ₂ -CuO/c-Cu ₂ O(s)催化剂，因此具有高密度的活性位点。