文献类型：期刊文献

英文题名：Catalytic oxidation of butylated hydroxytoluene using thermally treated cobalt-copper layered double hydroxides: Synthesis, structural evolution, and mechanistic insights

作者：Wang, Jiyu[1];Liu, Naiwang[1];Shi, Li[1];Meng, Xuan[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：569

外文期刊名：MOLECULAR CATALYSIS

收录：;EI(收录号：20243917086769);WOS:【SCI-EXPANDED(收录号:WOS:001321669700001)】；

语种：英文

外文关键词：Aerobic oxidation; Co-Cu hydrotalcite; Pi-election system; Reaction path; Reaction mechanism

摘要：This study investigates the application of cobalt-copper layered double hydroxides (LDHs) in the oxidation of butylated hydroxytoluene (BHT) and explores their catalytic behavior during thermal treatment. LDHs were synthesized via coprecipitation, and various ratios of Co-Cu hydrotalcite were subjected to thermal treatment. Structural analysis revealed that thermal treatment transforms the LDHs into mixed metal oxides. Among the synthesized catalysts, Co1Cu3-LDHs exhibited superior catalytic activity in the oxidation of BHT. Techniques such as XRD, FT-IR, TGA, N-2 adsorption-desorption, SEM, and XPS were employed to investigate the structural changes and surface properties of the LDHs. The Co1Cu3-LDH catalyst, treated at 250 degrees C, exhibited outstanding catalytic performance, attributed to the synergistic effects between Co and Cu. Upon optimizing the reaction conditions, the conversion of BHT reached 99 %, with a selectivity of 77 % towards 3,5-di-tert-butyl-4-hydroxybenzaldehyde (BHT-CHO). The oxidation mechanism involves the oxidation of the pi-electron system on the benzene ring and deep oxidation of the phenolic hydroxyl methyl group, with two potential reaction pathways proposed.