中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The states and effects of copper in Keggin-type heteropolyoxometalate catalysts on oxidation of methacrolein to methacrylic acid

文献类型:期刊论文

作者Zhou, Lilong1,2; Wang, Lei1; Cao, Yunli1,2; Diao, Yanyan1; Yan, Ruiyi1; Zhang, Suojiang1
刊名MOLECULAR CATALYSIS
出版日期2017-09-01
卷号438页码:47-54
关键词Methacrolein Methacrylic Acid Selective Oxidation Copper Heteropolyoxometalate Catalysts
ISSN号2468-8231
DOI10.1016/j.mcat.2017.04.031
文献子类Article
英文摘要

Finding out the mechanism how copper improves the catalytic performance is important to design efficient heteropolyoxometalate catalysts for clean production of methacrylic acid. In this work, copper containing heteropolyoxometalate catalysts (CsCuxH3-2xPMo11 VO40) were synthesized, characterized and used to catalyze the oxidation of methacrolein (MAL) to methacrylic acid. The FT-IR, TG-DTA and XPS results showed that copper was in the forms of Cu2+ and Cu+ and complexes with 4 water molecules in the secondary structure of the catalysts at room temperature. XRD and BET analysis showed that the addition of copper could increase the crystalline size of catalysts, prevent the accumulation of catalyst crystal and make catalysts to be a kind of mesoporous materials with narrow pore width distribution (around 4nm), which is positive for the catalytic performance. The catalytic tests showed that the addition of copper can obviously improve the catalytic performance of catalysts. Copper can get an electron from Keggin structure to improve the oxidation ability of active sites during the oxidation of MAL and give an electron to Keggin structure to make the reduced active sites to be re-oxidized easily. This paper gives a clear picture of copper states in the heteropolyoxometalate catalysts and the mechanism how copper improves the performance of heteropolyoxometalate catalysts s for oxidation reactions. (C) 2017 Elsevier B.V. All rights reserved.

WOS关键词Selective Oxidation ; Heteropoly Compounds ; Phosphomolybdic Acid ; Cuo Nanoparticles ; Performance ; Isobutane ; Photoelectron ; Stability ; Spectra ; Vanadyl
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000406565200006
资助机构National Key Research and Development Program of China(2016YFB0601303)
源URL[http://ir.ipe.ac.cn/handle/122111/23177]  
专题过程工程研究所_多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Inst Proc Engn, Key Lab Green Proc & Engn,State Key Lab Multiphas, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zhou, Lilong,Wang, Lei,Cao, Yunli,et al. The states and effects of copper in Keggin-type heteropolyoxometalate catalysts on oxidation of methacrolein to methacrylic acid[J]. MOLECULAR CATALYSIS,2017,438:47-54.
APA Zhou, Lilong,Wang, Lei,Cao, Yunli,Diao, Yanyan,Yan, Ruiyi,&Zhang, Suojiang.(2017).The states and effects of copper in Keggin-type heteropolyoxometalate catalysts on oxidation of methacrolein to methacrylic acid.MOLECULAR CATALYSIS,438,47-54.
MLA Zhou, Lilong,et al."The states and effects of copper in Keggin-type heteropolyoxometalate catalysts on oxidation of methacrolein to methacrylic acid".MOLECULAR CATALYSIS 438(2017):47-54.

入库方式: OAI收割

来源:过程工程研究所

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