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引用次数: 0
摘要
摘要 六铝酸盐因其卓越的机械和热稳定性而备受关注。它们可作为催化剂或催化剂支撑材料应用于高温反应。本研究采用溶胶-凝胶法合成了各种 LaFe x Al12-x O19 样品(x = 0.25、0.5、1 和 2)。随后,这些六铝酸盐样品浸渍了氧化钴,以在六铝酸盐支持物上形成更多的活性中心。通过 X 射线衍射、氢气温度编程还原和氧气温度编程解吸技术,研究了铁(Fe)含量对晶体结构、氧化还原特性和氧气不流动性的影响。在 Co3O4@LaFe x Al12-x O19 样品中,x ≥ 1 的样品呈现六铝酸盐晶体结构,显示出较高的晶格氧迁移率。
Determination of characteristic properties of Co3O4 loaded LaFe x Al12−x O19 hexaaluminates
Abstract Hexaaluminates are drawing attention due to their exceptional mechanical and thermal stability. They can be proposed for applications as catalysts or catalyst support materials in high-temperature reactions. In this study, various LaFe x Al12−x O19 samples (x = 0.25, 0.5, 1, and 2) have been synthesized using the sol–gel method. Subsequently, these hexaaluminate samples were impregnated with cobalt oxide to form more active centers on the hexaaluminate support. The influence of the iron (Fe) content on the crystal structure, redox properties, and oxygen immobility has been investigated through X-ray diffraction, hydrogen temperature-programmed reduction, and oxygen temperature-programmed desorption techniques. Among the Co3O4@LaFe x Al12−x O19 samples, those with x ≥ 1 exhibited a hexaaluminate crystalline structure, demonstrating a higher lattice oxygen mobility.
期刊介绍:
Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.