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Investigation of Co 3 O 4 –CeO 2 Composite Oxide as Catalyst for the Decomposition of N 2 O
Catalysis Surveys from Asia ( IF 2.1 ) Pub Date : 2020-05-13 , DOI: 10.1007/s10563-020-09303-7
Chenxi He , Aixia Li , Zhiming Liu

Co3O4–CeO2 composite oxides with various ratios of Ce/Co were fabricated by the hydrothermal method, and their activities in N2O decomposition have been studied. Co3O4–CeO2 catalyst is more active than pristine Co3O4 and CeO2 catalysts. Over Co3O4–CeO2 catalyst the strong interaction between Co3O4 and CeO2 existed, which suppressed the crystallization of Co3O4, resulting in the large surface area. Particularly, the synergetic effect between Co3O4 and CeO2 induces the formation of more active Co3+ and enhanced redox property of Co3O4–CeO2 catalyst. The desorption of adsorbed oxygen, which is the key step in N2O decomposition, can be promoted due to the existed redox cycle (Co2+ + Ce4+ ↔ Co3+ + Ce3+). Therefore, Co3O4–CeO2 composite oxide showed high activity for N2O decomposition.



中文翻译:

Co 3 O 4 -CeO 2复合氧化物催化N 2 O分解的研究

采用水热法制备了不同比例的Ce / Co的Co 3 O 4 -CeO 2复合氧化物,并研究了其在N 2 O分解中的活性。Co 3 O 4 -CeO 2催化剂比原始的Co 3 O 4和CeO 2催化剂更具活性。在Co 3 O 4 -CeO 2催化剂上,Co 3 O 4与CeO 2之间存在强相互作用,从而抑制了Co 3 O 4的结晶。,导致表面积很大。特别是,Co 3 O 4和CeO 2之间的协同作用诱导了活性更高的Co 3+的形成,并增强了Co 3 O 4 -CeO 2催化剂的氧化还原性能。由于存在氧化还原循环(Co 2+ + Ce 4+ ↔Co 3+ + Ce 3+),可以促进作为N 2 O分解关键步骤的吸附氧的解吸。因此,Co 3 O 4 -CeO 2复合氧化物对N 2 O分解具有很高的活性。

更新日期:2020-05-13
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