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Oxidative Esterification of Methacrolein to Methyl Methacrylate over Supported Gold Catalysts Prepared by Colloid Deposition
Li, Yuchao1; Zheng, Yanxia1; Wang, Lei2; Fu, Zhongjun1
2017-06-08
发表期刊CHEMCATCHEM
ISSN1867-3880
卷号9期号:11页码:1960-1968
摘要Esterification is one of the most pivotal organic transformations. Au catalysts were prepared by using a colloid deposition method with poly(vinyl alcohol) (PVA) as a protective agent. The catalyst was used for the oxidative esterification of methacrylate (MAL) to methyl methacrylate (MMA). Three pre-treatments were used to remove the PVA, which is unfavorable for catalytic activity. It is found that the catalyst pre-treated at 300 degrees C showed substantially improved activity owing to the lower PVA loading compared with catalysts treated with hot water washing and water reflux. Surprisingly, it is also found that the distribution and loading content of Au particles was closely related to the pH of the colloid solution. We demonstrate that the deposition process is controlled by the different charge of the support surface at different colloid solution pH. Further, the catalysts with similar size Au particles loaded on TiO2, SiO2, Al2O3, CeO2, ZrO2, and ZnO were successfully prepared by controlling the colloid solution pH. The Au/ZnO catalyst presented the best performance, which may be a result of the strong basic surface sites that improved the formation of the intermediate and the strong interaction between Au and ZnO. This interaction caused an anchoring effect and changed the geometries of Au particles, which could enhance the stability of catalysts and promote the mobility of oxygen, respectively.
关键词Colloids Gold Oxidative Esterification Supported Catalysts
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/cctc.201601688
收录类别SCI
语种英语
关键词[WOS]CO OXIDATION ; AU CATALYSTS ; NANOPARTICLES ; ALDEHYDES ; ALCOHOLS ; ESTERS ; METHANOL ; OXIDES
WOS研究方向Chemistry
WOS类目Chemistry, Physical
项目资助者National Basic Research Program of China(2015CB251401) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDA07070600) ; National Instrumentation Grant Program(2011YQ12003907) ; Special Funds of the National Natural Science Foundation of China(21127011)
WOS记录号WOS:000403017800013
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22644
专题多相复杂系统国家重点实验室
作者单位1.Shandong Univ Technol, Sch Chem Engn, Zibo 255049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
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Li, Yuchao,Zheng, Yanxia,Wang, Lei,et al. Oxidative Esterification of Methacrolein to Methyl Methacrylate over Supported Gold Catalysts Prepared by Colloid Deposition[J]. CHEMCATCHEM,2017,9(11):1960-1968.
APA Li, Yuchao,Zheng, Yanxia,Wang, Lei,&Fu, Zhongjun.(2017).Oxidative Esterification of Methacrolein to Methyl Methacrylate over Supported Gold Catalysts Prepared by Colloid Deposition.CHEMCATCHEM,9(11),1960-1968.
MLA Li, Yuchao,et al."Oxidative Esterification of Methacrolein to Methyl Methacrylate over Supported Gold Catalysts Prepared by Colloid Deposition".CHEMCATCHEM 9.11(2017):1960-1968.
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