Shao Xiaoqiang, He Jia, Su Qin, Zhao Donglin, Feng Shaojie
Key Laboratory of Functional Molecule Design and Interface Process China.
Anhui Province International Center on Advanced Building Materials, Anhui Jianzhu University Hefei 230601 China
RSC Adv. 2022 Jun 14;12(27):17490-17497. doi: 10.1039/d2ra02237k. eCollection 2022 Jun 7.
Spinel oxides (ABO) have been widely studied as catalysts for methane combustion. Increasing attention was focused on the catalysis properties of the [BO] octahedron; however, the role of the [AO] tetrahedron in the catalytic activity was seldom discussed. Herein, a series of (CuO) -CuCoO ( = 0, 0.1, 0.2) composite oxides were synthesized by a solvothermal method. The structure, morphology, and physicochemical properties of the as-synthesized samples were characterized by the XRD, SEM, BET, and XPS techniques. The results of the catalytic activity tests showed that the coexistence of CuO with CuCoO can improve the catalytic activity. The XPS results demonstrated that there were remarkable Cu ions present in the composite oxides, which can cause increases in the number of oxygen vacancies on the surface of the catalysts. In addition, the redox of Cu and Cu may improve the oxygen exchange capacity for methane oxidation.
尖晶石氧化物（ABO）作为甲烷燃烧催化剂已被广泛研究。人们越来越关注[BO]八面体的催化性能；然而，[AO]四面体在催化活性中的作用却很少被讨论。在此，通过溶剂热法合成了一系列（CuO）-CuCoO（= 0、0.1、0.2）复合氧化物。采用XRD、SEM、BET和XPS技术对合成样品的结构、形貌和物理化学性质进行了表征。催化活性测试结果表明，CuO与CuCoO共存可提高催化活性。XPS结果表明，复合氧化物中存在显著的Cu离子，这会导致催化剂表面氧空位数量增加。此外，Cu和Cu的氧化还原可能会提高甲烷氧化的氧交换能力。
