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dc.contributor.authorZeng, Gaofeng
dc.contributor.authorGoldbach, Andreas
dc.contributor.authorShi, Lei
dc.contributor.authorXu, Hengyong
dc.date.accessioned2015-08-03T09:59:21Z
dc.date.available2015-08-03T09:59:21Z
dc.date.issued2012-08-21
dc.identifier.issn19327447
dc.identifier.doi10.1021/jp305771h
dc.identifier.urihttp://hdl.handle.net/10754/562283
dc.description.abstractKnowledge 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 μm thick supported Pd 100-xAg x 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. © 2012 American Chemical Society.
dc.publisherAmerican Chemical Society (ACS)
dc.titleCompensation effect in H 2 permeation kinetics of PdAg membranes
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalThe Journal of Physical Chemistry C
dc.contributor.institutionDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, 116023 Dalian, China
kaust.personZeng, Gaofeng
kaust.personShi, Lei
dc.date.published-online2012-08-21
dc.date.published-print2012-08-30


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