A series of Cu_xCo_3−xO₄ catalysts were prepared and presented as active and stable catalysts in the oxidation of CO into CO₂ at relatively low temperatures. These nanoparticles were synthesized by co-precipitation assisted ultrasonic radiation method. The thermal behavior, structural, spectroscopic, texture, and morphological characterizations were carried out adopting TG-DTA, XRD, XPS, FTIR, N₂-sorption, and TEM techniques. In addition, electrical conductivity and surface chemisorbed oxygen measurements were also studied. The quantity and strength of basic sites were estimated using CO₂-TPD. The results revealed that the insertion of Cu²⁺ with values of x from 0.25 to 0.75, into Co₃O₄ catalysts calcined at 400 °C monotonically increases the S_BET, the amount of surface chemisorbed oxygen, catalyst basicity, electrical conductivity and catalytic activity. In addition, the activity increases to an optimal amount of Cu²⁺ substitution for Co²⁺ with x = 0.75 which exhibited the most active catalyst with a value of T₁₀₀ of 125 °C. Results of CO₂-TPD demonstrated that, incorporation of Cu²⁺ with a value of x of 0.75 not only increases the total basicity, but also altered strength and distribution of basic sites over the surface of the catalyst. The role of the active redox sites existed on the surface of these catalysts such as, Co³⁺/Co²⁺, Cu²⁺/Cu⁺ and Co³⁺/Cu⁺, which are accountable for such alteration, was also debated. The most active catalyst Cu_0.75Co_2.25O₄ displayed a long-term stability up to 100 h.

制备了一系列Cu _x Co _3-x O ₄催化剂，并作为活性和稳定的催化剂，在较低的温度下将CO氧化为CO ₂。这些纳米颗粒通过共沉淀辅助超声辐射法合成。采用TG-DTA，XRD，XPS，FTIR，N ₂吸附和TEM技术进行了热行为，结构，光谱，织构和形态表征。此外，还研究了电导率和表面化学吸附氧的测量。使用CO ₂ -TPD估算碱性场所的数量和强度。结果表明，Cu ²⁺的插入X的x值从0.25到0.75，进入在400°C煅烧的Co ₃ O ₄催化剂中，S _BET，表面化学吸附氧量，催化剂碱度，电导率和催化活性单调增加。另外，活性增加至x ＝ 0.75的Co ²⁺的Cu ²⁺置换的最佳量，其表现出最具活性的催化剂，其T ₁₀₀值为125℃。CO ₂ -TPD的结果表明，Cu ^2+的结合x值为0.75时，不仅增加了总碱度，而且改变了催化剂表面上的碱性位点的强度和分布。还讨论了在这些催化剂表面上存在的活性氧化还原位点的作用，例如引起这种变化的Co ³⁺ / Co 2 ⁺，Cu ²⁺ / Cu ⁺和Co ³⁺ / Cu ⁺。活性最高的催化剂Cu _0.75 Co _2.25 O ₄表现出长达100小时的长期稳定性。