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Promoting effects of MgO, (NH4)(2)SO4 or MoO3 modification in oxidative esterification of methacrolein over Au/Ce0.6Zr0.4O2-based catalysts
Li, Yuchao1,2; Wang, Lei1; Yan, Ruiyi1; Han, Junxing1; Zhang, Suojiang1
2016
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume6Issue:14Pages:5453-5463
AbstractMgO, (NH4)(2)SO4 or MoO3-modified Ce0.6Zr0.4O2-supported gold catalysts were synthesized and studied for the oxidative esterification of methacrolein with methanol to methyl methacrylate. Although the particle size distribution and oxidative state of the supported Au showed almost no change before and after Ce0.6Zr0.4O2 modification as confirmed by TEM, Raman and XPS technologies, all of the modified Au/Ce0.6Zr0.4O2 catalysts demonstrated highly improved catalytic activities. H-2-TPR patterns indicated that the amounts of low-temperature active oxygen species increased in the MgO-and MoO3-modified catalysts. At the same time, the strong interaction between gold and Ce-Zr oxides in the MgO-modified catalyst and the charge transfer between Mo6+ and Ce3+ in the MoO3-modified catalyst were evidenced by XPS characterization. Based on the enhanced synergetic effects between the Au nanoparticles and the support for oxygen activation, the MgO-promoted Au catalyst presented the best performance with a methacrolein conversion of 98% and a methyl methacrylate selectivity of 90% in the absence of a base at 80 degrees C for 2 h of reaction. Differing from MgO and MoO3, (NH4)(2)SO4 modification simultaneously increased the acid-base properties of the catalyst and then increased the activity of the catalyst due to the promoted formation of the intermediate hemiacetal.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c5cy02301g
Indexed BySCI
Language英语
WOS KeywordCO OXIDATION ; GOLD NANOPARTICLES ; SOLID-SOLUTIONS ; BIFUNCTIONAL CATALYST ; MIXED OXIDES ; ALDEHYDES ; ALCOHOLS ; ESTERS ; CEO2 ; COMBUSTION
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Basic Research Program of China(2015CB251401) ; Key Program of the National Natural Science Foundation of China(91434203) ; External Cooperation Program of BIC, Chinese Academy of Sciences(GJHZ201306) ; International S&T Cooperation Program of China(2014DFA61670) ; International Cooperation and Exchange of the National Natural Science Foundation of China(51561145020) ; Beijing Natural Science Foundation(2153042)
WOS IDWOS:000379438000021
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21257
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Yuchao,Wang, Lei,Yan, Ruiyi,et al. Promoting effects of MgO, (NH4)(2)SO4 or MoO3 modification in oxidative esterification of methacrolein over Au/Ce0.6Zr0.4O2-based catalysts[J]. CATALYSIS SCIENCE & TECHNOLOGY,2016,6(14):5453-5463.
APA Li, Yuchao,Wang, Lei,Yan, Ruiyi,Han, Junxing,&Zhang, Suojiang.(2016).Promoting effects of MgO, (NH4)(2)SO4 or MoO3 modification in oxidative esterification of methacrolein over Au/Ce0.6Zr0.4O2-based catalysts.CATALYSIS SCIENCE & TECHNOLOGY,6(14),5453-5463.
MLA Li, Yuchao,et al."Promoting effects of MgO, (NH4)(2)SO4 or MoO3 modification in oxidative esterification of methacrolein over Au/Ce0.6Zr0.4O2-based catalysts".CATALYSIS SCIENCE & TECHNOLOGY 6.14(2016):5453-5463.
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