CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Gold nanoparticles supported on Ce-Zr oxides for the oxidative esterification of aldehydes to esters
Li, Yuchao1,2; Wang, Lei1; Yan, Ruiyi1; Han, Junxing1; Zhang, Suojiang1
2015
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume5Issue:7Pages:3682-3692
Abstract

Au nanoparticles supported on Ce-Zr oxides were prepared and characterized in order to study the role of the support in the oxidative esterification of aldehydes in the presence of molecular oxygen. Ce-Zr solid solutions were synthesized by using (NH4)(2)Ce(NO3)(6) as a precursor, while the mixed oxides were obtained by using a Ce(NO3)(3) precursor. The solid solutions exhibited a smaller crystallite size, higher BET surface area, larger amount of H-2 consumption, and higher acidity and basicity than the mixed oxides at the same Ce/Zr molar ratio due to the incorporation of Zr4+ into the ceria lattice. The effect of the support was investigated because all the samples presented similar Au particle sizes, as confirmed by the HAADF-STEM study. Supports with higher reducibility showed better performance by activating methanol to methoxy and facilitating the beta-H elimination of hemiacetal. We also found that the formation of hemiacetal was enhanced by the acidic sites and basic sites of Au catalysts supported on solid solutions possessing similar reducibility. A plausible reaction mechanism for the oxidative esterification of aldehydes on Ce-Zr solid solution-supported Au nanoparticles was proposed. The screened catalyst was also applicable to the oxidative esterification of different benzylic aldehydes, producing high yields. This catalyst could be reused after a simple separation eight times, keeping a high selectivity of above 99%.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c5cy00241a
Indexed BySCI
Language英语
WOS KeywordTEMPERATURE CO OXIDATION ; BIFUNCTIONAL CATALYST ; AEROBIC OXIDATION ; CARBON-MONOXIDE ; PARTICLE-SIZE ; ALCOHOLS ; GAS ; CERIA ; AU ; TRANSFORMATION
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000356610600027
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19310
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ionic Liquids Clean Proc, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Coll Chem & Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Yuchao,Wang, Lei,Yan, Ruiyi,et al. Gold nanoparticles supported on Ce-Zr oxides for the oxidative esterification of aldehydes to esters[J]. CATALYSIS SCIENCE & TECHNOLOGY,2015,5(7):3682-3692.
APA Li, Yuchao,Wang, Lei,Yan, Ruiyi,Han, Junxing,&Zhang, Suojiang.(2015).Gold nanoparticles supported on Ce-Zr oxides for the oxidative esterification of aldehydes to esters.CATALYSIS SCIENCE & TECHNOLOGY,5(7),3682-3692.
MLA Li, Yuchao,et al."Gold nanoparticles supported on Ce-Zr oxides for the oxidative esterification of aldehydes to esters".CATALYSIS SCIENCE & TECHNOLOGY 5.7(2015):3682-3692.
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