Ceria-based solid solutions (M_0.01Ce_0.99O₂) with low-content dopants were synthesized by the co-precipitation method, followed by calcination at the temperature of 500 °C. The effect of doping on catalytic performance in CO oxidation was investigated, and the catalyst physicochemical properties were studied. The introduction of even a small amount of metal dopants significantly increased the activity of catalysts. Thus, the most active catalysts were systems when doping ceria with metals Cu, Mn, and Co, i.e., with a small ionic radius and having multivalent oxidation states. It is shown that the high activity was a result of the increased interaction of M^δ+ with ceria due to facile electron exchange between M^δ+ and Ce⁴⁺/Ce³⁺, the redox cycle was one of the key factors in the CO oxidation, as well as well-integrated metal species in ceria lattice, especially in subsurface layer.

采用共沉淀法合成了低掺杂含量的二氧化铈基固溶体（M _0.01 Ce _0.99 O ₂），并在500 ℃温度下煅烧。研究了掺杂对CO氧化催化性能的影响，并研究了催化剂的理化性能。即使引入少量金属掺杂剂也能显着提高催化剂的活性。因此，最活跃的催化剂是当二氧化铈与金属Cu、Mn和Co掺杂时的体系，即具有小离子半径并具有多价氧化态的体系。结果表明，高活性是由于M ^δ+与Ce ⁴⁺ /Ce ³⁺之间容易发生电子交换，M δ+ 与二氧化铈^相互作用增强的结果，氧化还原循环是CO 的关键因素之一。氧化，以及二氧化铈晶格中集成良好的金属物质，特别是在地下层。