Regulating electronic environment on alkali metal-doped Cu@NS-SiO_(2) for selective anisole hydrodeoxygenation  

作　　者：Xiaofei Wang Xiaoxue Han Li Kang Shixiang Feng Meiyan Wang Yue Wang Shouying Huang Yujun Zhao Shengping Wang Xinbin Ma 

机构地区：[1]Key Laboratory for Green Chemical Technology of Ministry of Education,Collaborative Innovation Centre of Chemical Science and Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin,300072,China [2]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou,350207,China [3]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin,300192,China

出　　处：《Green Chemical Engineering》2023年第3期294-302,共9页绿色化学工程（英文）

基　　金：The work was supported by National Natural Science Foundation of China(21938008);Haihe Laboratory of Sustainable Chemical Transformations(CYZC202106).

摘　　要：Lignin utilization is a potential approach for replacing fossil energy and releasing the environment pressure.Herein,we synthesized a series of novel Cu-based catalysts,Cu@NS-SiO_(2)(NS=nano sphere)and alkali metals(Na,K,Rb,and Cs)doped Cu@NS-SiO_(2),and applied them in hydrodeoxygenation reaction of anisole.High Cu dispersion was presented on all catalysts.The modification of alkali metals on Cu@NS-SiO_(2) significantly enhanced the electron density of Cu sites in the following order:Cs>Rb>K>Na,among which Cs decreased the Cu_(2)p_(3)/2 binding energy most(by 0.7 eV).Moreover,the modification did not substantially affect the geometric structure of Cu species.This regulable electronic environment of Cu sites was crucial for selective deoxygenation and inhibiting the hydrogenation of aromatic rings in anisole,and thus promoted the selectivity of benzene.Compared with Cu@NS-SiO_(2)(~59%),the highest benzene selectivity was obtained on Cs/10Cu@NS-SiO_(2) at~83%.

关 键 词：ANISOLE HYDRODEOXYGENATION ARENES Alkali metal Electronic effect 

分 类 号：TQ426[化学工程]