Compensation Effect in H-2 Permeation Kinetics of PdAg Membranes

	Compensation Effect in H-2 Permeation Kinetics of PdAg Membranes
	Zeng, Gaofeng; Goldbach, Andreas; Shi, Lei; Xu, Hengyong
刊名	journal of physical chemistry c
	2012-08-30
卷号	116 期号:34 页码:18101-18107
英文摘要	knowledge about the (inter)dependence of permeation kinetic parameters on the stoichiometry of h-2- selective alloys is still rudimentary, although uncovering the underlying systematic correlations will greatly facilitate current efforts into the design of novel high-performance h-2 separation membranes. permeation measurements with carefully engineered, 2-7 mu m thick supported pd100-xagx membranes reveal that the activation energy and pre-exponential factor of h-2 permeation laws vary systematically with alloy composition, and both kinetic parameters are strongly correlated for x <= 50. we show that this permeation kinetic compensation effect corresponds well with similar correlations in the hydrogen solution thermodynamics and diffusion kinetics of pdag alloys that govern h-2 permeation rates. this effect enables the consistent description of permeation characteristics over wide temperature and alloy stoichiometry ranges, whereas hydrogen solution thermodynamics may play a role, too, as a yet unrecognized source of kinetic compensation in, for example, h-2-involving reactions over metal catalysts or hydrogenation/dehydrogenation of hydrogen storage materials.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	palladium-silver membranes ; low-temperature h-2 ; mathematical origins ; hydrogen-production ; composite membrane ; ag membranes ; alloys ; diffusion ; thermodynamics ; permeability
收录类别	SCI
语种	英语
WOS记录号	WOS:000308120000014
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/143000]
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	Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Gaofeng,Goldbach, Andreas,Shi, Lei,et al. Compensation Effect in H-2 Permeation Kinetics of PdAg Membranes[J]. journal of physical chemistry c,2012,116(34):18101-18107.
APA	Zeng, Gaofeng,Goldbach, Andreas,Shi, Lei,&Xu, Hengyong.(2012).Compensation Effect in H-2 Permeation Kinetics of PdAg Membranes.journal of physical chemistry c,116(34),18101-18107.
MLA	Zeng, Gaofeng,et al."Compensation Effect in H-2 Permeation Kinetics of PdAg Membranes".journal of physical chemistry c 116.34(2012):18101-18107.