高效单原子金催化剂用于一步氧化酯化反应  

Highly Efficient Single-Atom Gold Catalyst for One-Step Oxidation and Esterification

作　　者：李淑越 陈瑶 郑艳霞 左村村 江洪昌 米广泽 李玉超 Li Shuyue;Chen Yao;Zheng Yanxia;Zuo Cuncun;Jiang Hongchang;Mi Guangze;Li Yuchao(School of Chemistry and Chemical Engineering,Institute of Clean Chemical Engineering,Shandong University of Technology,Zibo255049,China)

机构地区：[1]山东理工大学化学化工学院清洁化工研究院,山东淄博255049

出　　处：《中国稀土学报》2022年第5期778-784,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21908132)资助。

摘　　要：甲基丙烯酸甲酯广泛用于有机玻璃和涂料行业,一步法合成甲基丙烯酸甲酯因其工艺简单、反应副产物少、条件温和引起了广泛关注。采用浸渍法合成了不同Au负载量的单原子Au催化剂并用于甲基丙烯醛的氧化酯化反应。催化剂的结构、形貌和性能通过XRD,TEM,BET,ICP,UV-vis,H_(2)-TPR和XPS等方法进行了表征,制备了均匀分散的单原子Au催化剂。通过对不同Au负载量的单原子催化剂的性能进行对比,Au-10/CeO_(2)催化剂表现出优异的催化性能,结合TPR和XPS分析结果,发现该催化剂载体表面具有更多活性氧,单原子Au和CeO_(2)之间形成强相互作用。Methyl methacrylate is widely used in the plexiglass and coating industries.The one-step synthesis of methyl methacrylate has attracted widespread attention due to the simplified process,less by-products and mild conditions.Single-atom Au catalysts with different gold loadings were synthesized by impregnation method,and applied to the oxidative esterification of methacrolein.The structure,morphology and performance of catalysts were characterized by XRD,TEM,BET,UV-vis,H_(2)-TPR and XPS.A uniformly dispersed monoatomic gold catalyst was prepared.By comparing the performance of catalysts with different gold loadings,the Au/CeO_(2)-10 catalyst exhibits excellent catalytic performance.Combining the results of TPR and XPS,the surface of the catalyst carrier has more active oxygen anda strong interaction is formed between singleatom Au and CeO_(2).

关 键 词：单原子金 氧化酯化 甲基丙烯醛 甲基丙烯酸甲酯 催化剂 稀土 

分 类 号：O643.3[理学—物理化学]