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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
发表期刊CATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
卷号6期号:14页码:5453-5463
摘要MgO, (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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c5cy02301g
收录类别SCI
语种英语
关键词[WOS]CO OXIDATION ; GOLD NANOPARTICLES ; SOLID-SOLUTIONS ; BIFUNCTIONAL CATALYST ; MIXED OXIDES ; ALDEHYDES ; ALCOHOLS ; ESTERS ; CEO2 ; COMBUSTION
WOS研究方向Chemistry
WOS类目Chemistry, Physical
项目资助者National 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记录号WOS:000379438000021
引用统计
被引频次:3[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/122111/21257
专题多相复杂系统国家重点实验室
作者单位1.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
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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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