High-valance molybdenum doped Co_(3)O_(4) nanowires:Origin of the superior activity for 5-hydroxymethyl-furfural oxidation  

作　　者：Bingying Xia Guangjin Wang Shasha Cui Jinyu Guo Hong Xu Zhijuan Liu Shuang-Quan Zang 

机构地区：[1]Henan Key Laboratory of Crystalline Molecular Functional Materials,Henan International Joint Laboratory of Tumor Theranostical Cluster Materials,Green Catalysis Center,and College of Chemistry,ZhengzhouUniversity,Zhengzhou 450001,China [2]School of Materials Science and Energy Engineering,Foshan University,Foshan 528000,China

出　　处：《Chinese Chemical Letters》2023年第7期384-389,共6页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 92061201, 21825106, 22102155 and 32072304);the China Postdoctoral Science Foundation (Nos. 2021M692909 and 2022T150587);the Program for Innovative Research Team (in Science and Technology) in Universities of Henan Province and Zhengzhou University (No. 19IRSTHN022);the Key Scientific and Technological Project of Henan Province (No. 2021102210027)。

摘　　要：Co_(3)O_(4) has been widely explored in electrocatalytic 5-hydroxymethyl-furfural(HMF) oxidation. However,the poor intrinsic ability has seriously limited its electrochemical ability. Heteroatom-doping is an efficient method to enhance the electrocatalytic ability of catalyst by regulating electronic structure. Herein,we have modulated the electronic structure of Co_(3)O_(4) by high valance Mo^(6+)-doping. With the introduction of Mo^(6+), the content of Co^(2+) was increased and metal-oxygen bond was strength. Electrochemical results suggested that the electrocatalytic ability of Co_(3)O_(4) towards HMF oxidation has been dramatically improved and reaction kinetics has been fasten. Theoretical calculations demonstrated that the surrounding cobalt sites after Mo^(6+)-doping with assembled electron has a strong adsorption ability towards HMF molecule leading to more favourable oxidation of HMF. Post characterizations demonstrated pristine Co_(3)O_(4) structure was kept after electrolysis cycles and CoOOH active species were formed. This work provides a valuable reference for developing efficient heteroatom-doped electrocatalysts for HMF oxidation.

关 键 词：Spinel Co_(3)O_(4) High-valance Mo^(6+)-doping Electronic structure Adsorption ability 5-Hydroxymethyl-furfural oxidation 

分 类 号：TQ251.1[化学工程—有机化工] TQ426