Lanthanum Oxide-Modified Cu/SiO2 as a High-Performance Catalyst for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

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	Lanthanum Oxide-Modified Cu/SiO2 as a High-Performance Catalyst for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol
	Zheng, Xinlei ; Lin, Haiqiang ; Zheng, Jianwei ; Duan, Xinping ; Yuan, Youzhu ; Lin HQ(林海强) ; Yuan YZ(袁友珠)
刊名	http://dx.doi.org/10.1021/cs400574v
	2013
关键词	VAPOR-PHASE HYDROGENATION SUPPORTED COPPER-CATALYSTS SELECTIVE HYDROGENATION ENHANCED ACTIVITY CU/HMS CATALYST SURFACE-AREA HMS CATALYST STABILITY OXIDATION SILICA
英文摘要	National Basic Research Program of China [2011CBA00508]; Natural Science Foundation of China [21173175, 20923004]; Research Fund for the Doctoral Program of Higher Education [20110121130002]; Program for Changjiang Scholars and Innovative Research Team in University [IRT1036]; Several lanthanum oxide-modified Cu/SiO2 (La-Cu/SiO2) catalysts synthesized by urea-assisted gelation and postimpregnation were used for the vapor-phase chemoselective hydrogenation of dimethyl oxalate (DMO) into ethylene glycol (EG). The 1.0La-Cu/SiO2-u catalyst with 1.0 wt % La loading was found to have the highest activity, whereas the catalyst with higher La loading at 3.0 wt % adversely affected the deterioration of catalytic activity. H-2-TPR results revealed that strong interactions between La promoters and Cu species substantially changed catalyst reducibility and made some Cu2+ species on catalyst precursors difficult to be reduced. Several positive variations induced by the introduction of La were confirmed by in situ XRD, N2O chemisorption, H-2-TPD, X-ray Auger electron spectroscopy, and in situ FT-IR of chemisorbed CO. These variations included increased Cu metallic dispersion, improved ability for H-2 activation, elevated surface concentration of Cu+ species, and enhanced stability of catalyst nanostructure. The formation of unique Cu-O-La bonds between LaOx and cupreous species located at interfacial sites was presumably responsible for the improved catalytic performance and stability of La-Cu/SiO2-u catalyst.
语种	英语
出版者	AMER CHEMICAL SOC
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88724]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zheng, Xinlei,Lin, Haiqiang,Zheng, Jianwei,et al. Lanthanum Oxide-Modified Cu/SiO2 as a High-Performance Catalyst for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol[J]. http://dx.doi.org/10.1021/cs400574v,2013.
APA	Zheng, Xinlei.,Lin, Haiqiang.,Zheng, Jianwei.,Duan, Xinping.,Yuan, Youzhu.,...&袁友珠.(2013).Lanthanum Oxide-Modified Cu/SiO2 as a High-Performance Catalyst for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol.http://dx.doi.org/10.1021/cs400574v.
MLA	Zheng, Xinlei,et al."Lanthanum Oxide-Modified Cu/SiO2 as a High-Performance Catalyst for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol".http://dx.doi.org/10.1021/cs400574v (2013).