Let¡¯s face it, organic chemistry can seem difficult to learn, Category: copper-catalyst, Especially from a beginner¡¯s point of view. Like 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, molecular formula is copper-catalyst, belongs to copper-catalyst compound. In a document, author is Kaewbuddee, C., introducing its new discovery.
Structural characterizations of copper incorporated manganese oxide OMS-2 material and its efficiencies on toluene oxidation
This work aimed to study the excellent properties of the high-valent copper doped into the framework structure of K-OMS-2 catalyst (Cu-K-OMS-2). The physicochemical properties of Cu-K-OMS-2 material were examined by many techniques. The copper dopant can improve the physicochemical properties of the K-OMS-2 catalyst, including the specific surface area, O-ads/O-latt ratio, and Cu3+/Cu2+ ratio, resulting in enhanced catalytic activity. The specific surface area of Cu-K-OMS-2 was higher than K-OMS-2 material. The Mn3+/Mn4+ ratio of K-OMS-2 (0.10) was decreased, compared with the Cu-K-OMS-2 (0.08) catalyst. Moreover, the copper dopant can enhance the O-ads/O-latt ratio of Cu-K-OMS-2 to 0.62, which higher than K-OMS-2 (0.24). The Cu3+ species were observed in the Cu-K-OMS-2 structure. Besides, the oxidation state of copper on the Cu-K-OMS-2 surface revealed both Cu3+ and Cu2+ species, which affected toluene removal. The existence of the Cu3+/Cu2+ ratio led to enhance toluene removal at the low reaction temperature. Moreover, the Cu K-edge EXAFS spectrum demonstrated that the Cu ions existed in the same site as the Mn ions in the K-OMS-2 framework structure. Consequently, we can propose that Cu3+ existed in the Cu-K-OMS-2 framework structure, which influenced the high toluene oxidation at the low reaction temperature. The H-2-TPR results confirmed that the copper dopant could improve the reducibility and enhance oxygen mobility of K-OMS-2 material at the low reaction temperature. Also, the high-valent copper doped into the K-OMS-2 catalyst showed high stability for VOCs oxidation. The activation energy of toluene oxidation over the Cu-K-OMS-2 catalyst was about 91.18 kJ mol(-1).
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Reference:
Copper catalysis in organic synthesis – NCBI,
,Special Issue “Fundamentals and Applications of Copper-Based Catalysts”