Cobalt-based perovskites containing strontium and copper (La1-xSrxCo1-yCuyO3) were synthesized by the sol-gel method and characterized by XRD, H2-TPR, N2-adsorbtion, XRF and XPS techniques. The XRD results showed that the rhombohedral structure of perovskites was obtained. The activation energy employed to analyze the activities of samples in the combustion of methane was optimized using full factorial design (FD) by considering strontium (x=0, 0.1 and 0.2) and copper (y=0, 0.25 and 0.5) as the input variables. Analysis of Variance (ANOVA) was employed to investigate the obtained data and a p تفاصيل المقالة

Perovskite oxides possessing high stability and composition adjustability are effective in many applications. The La2BMnO6 (B=Co, Ni) double perovskite oxides were synthesized using the sol-gel method and deposited on MgO support (loading = 10, 20, and 30 wt. %) using a mechanical mixing method by an ultrasonic device. The elaborated samples were investigated for application in propane deep oxidation. The catalytic performance of these catalysts was analyzed by a variety of characterization techniques such as XRD, SEM, FTIR, TEM, and H2-TPR. Ni-containing catalysts were found to have superior catalytic activity than the sample containing Co. The lowest catalytic activity belonged to the cobalt-containing double perovskite with 10 wt.% loading on MgO support, while the highest conversion was related to the 20La2NiMnO6/MgO composite oxide with T90 = 434 °C. The support showed a positive impact on the performance of the catalysts. Deposition of a certain amount of perovskite oxides on the support boosted the specific surface area of the catalyst and, therefore, combined with improved reducibility, improved propane catalytic degradation. تفاصيل المقالة