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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
Source PublicationCHEMCATCHEM
ISSN1867-3880
Volume9Issue:11Pages:1960-1968
Abstract

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.

KeywordColloids Gold Oxidative Esterification Supported Catalysts
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/cctc.201601688
Indexed BySCI
Language英语
WOS KeywordCo Oxidation ; Au Catalysts ; Nanoparticles ; Aldehydes ; Alcohols ; Esters ; Methanol ; Oxides
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Basic Research Program of China(2015CB251401)
WOS IDWOS:000403017800013
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22644
Collection多相复杂系统国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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