Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid

	Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid
	Xu, Shuliang 1,2; Wang, Lixia 1,2; Chu, Wenling 1; Yang, Weishen 1
刊名	journal of molecular catalysis a-chemical
	2009-09-01
卷号	310 期号:1-2 页码:138-143
关键词	Ethylene oxidation Acetic acid Pd-SiW12/SiO2 Pd dispersion
英文摘要	the effects of palladium precursors (pdcl2, (nh4)(2)pdcl4, pd(nh3)(2)cl-2, pd(no3)(2) and pd(ch3coo)(2)) on the catalytic properties in the selective oxidation of ethylene to acetic acid have been investigated for 1.0wt% pd-30wt% h4siw12o40/sio2. the structures of the catalysts were characterized using x-ray diffraction, n-2 adsorption, h-2-pulse chemical adsorption, infrared spectrometry of the adsorbed pyridine, h-2 temperature-programmed reduction and x-ray photoelectron spectroscopy. the present study demonstrates that the different palladium precursors can lead to the significant changes in the dispersion of palladium. it is found that pd dispersion decreases as follows: pdcl2>(nh4)(2)pdcl4>pd(no3)(2)>pd(nh3)(2)cl-2>pd(c2h3o2)(2), which is nearly identical to the catalytic activity. this indicates that the dispersion of palladium plays an important role in the catalytic activity. furthermore, density of lewis (l) and bronsted (b) acid sites are also strongly dependent on the palladium precursors. it is also demonstrated that an effective catalyst should possess a well combination of bronsted acid sites with dispersion of palladium. (c) 2009 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	selective oxidation ; skeletal isomerization ; vapor-phase ; n-heptane ; palladium ; ethene ; conversion ; zirconia ; hydrogen
收录类别	SCI
语种	英语
WOS记录号	WOS:000269426900017
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/141471]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu, Shuliang,Wang, Lixia,Chu, Wenling,et al. Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid[J]. journal of molecular catalysis a-chemical,2009,310(1-2):138-143.
APA	Xu, Shuliang,Wang, Lixia,Chu, Wenling,&Yang, Weishen.(2009).Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid.journal of molecular catalysis a-chemical,310(1-2),138-143.
MLA	Xu, Shuliang,et al."Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid".journal of molecular catalysis a-chemical 310.1-2(2009):138-143.