Synthesis of Vanadium Phosphorus Oxide Catalysts Assisted by Deep-Eutectic Solvents for n-Butane Selective Oxidation

被引:45
|
作者
He, Bin [1 ,2 ]
Li, Zihang [1 ]
Zhang, Huiling [1 ]
Dai, Fei [1 ]
Li, Kang [1 ]
Liu, Ruixia [1 ,2 ]
Zhang, Suojiang [1 ]
机构
[1] Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, State Key Lab Multiphase Complex Syst,Inst Proc E, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
VPO CATALYSTS; MALEIC-ANHYDRIDE; MILD OXIDATION; PHOSPHATE CATALYSTS; IONIC LIQUIDS; ACETIC-ACID; PERFORMANCE; PYROPHOSPHATE; PHASE; DEHYDROGENATION;
D O I
10.1021/acs.iecr.8b06010
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The effects of choline chloride/oxalic acid deep eutectic solvents (ChCl/OA DES) as a green and effective promoter assisting the synthesis of vanadium phosphorus oxide (VPO) catalysts for the selective oxidation of n-butane to maleic anhydride were investigated in detail. A combination of characterizations with the performance was considered to understand the essential effects of DES. DES play the role of a crystal induced agent and structural modifier, facilitating the formation of a single-crystal structure on the surface of precursor; correspondingly, topological transformation to the single-crystal active phase under the activation conditions accompany the decomposition of DES. It is suggested that ChCl/OA DES can interact with V2O5 and form a new vanadium complex, which affects the reaction between V2O5 and H3PO4. Meanwhile, the ChCl/OA DES could regulate the surface chemical state and redox characteristic, resulting in the enhancement on the catalytic performance of VPO.
引用
收藏
页码:2857 / 2867
页数:11
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