DICP OpenIR
Subject Area物理化学
Structural and Permeation Kinetic Correlations in PdCuAg Membranes
Zhao, Lingfang; Goldbach, Andreas; Bao, Chun; Xu, Hengyong; 哥德巴赫
KeywordHydrogen Separation Ternary Alloy Vegard's Law Kinetic Compensation Structure-function Relationship
Source PublicationACS APPLIED MATERIALS & INTERFACES
2014-12-24
DOI10.1021/am506439x
Volume6Issue:24Pages:22408-22416
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS KeywordHYDROGEN SEPARATION MEMBRANES ; LOW-TEMPERATURE H-2 ; ALLOY MEMBRANES ; ELEVATED-TEMPERATURES ; MATHEMATICAL ORIGINS ; PALLADIUM MEMBRANES ; TERNARY ALLOY ; PD ; TRANSPORT ; SOLUBILITY
AbstractAddition of Ag is a promising way to enhance the H-2 permeability of sulfur-tolerant PdCu membranes for cleanup of coal-derived hydrogen. We investigated a series of PdCuAg membranes with at least 70 atom % Pd to elucidate the interdependence between alloy structure and H-2 permeability. Membranes were prepared via sequential electroless plating of Pd, Ag, and Cu onto ceramic microfiltration membranes and subsequent alloying at elevated temperatures. Alloy formation was complicated by a wide miscibility gap in the PdCuAg phase diagram at the practically feasible operation temperatures. X-ray diffraction showed that the lattice constants of the fully alloyed ternary alloys obey Vegards law closely. In general, H-2 permeation rates increased with increasing Ag and decreasing Cu content of the membranes in the investigated temperature range. Detailed examination of the permeation kinetics revealed compensation between activation energy and pre-exponential factor of the corresponding H-2 permeation laws. The origin of this effect is discussed. Further analysis showed that the activation energy for H-2 permeation decreases overall with increasing lattice constant of the ternary alloy. The combination of these correlations results in a structurefunction relationship that will facilitate rational design of PdCuAg membranes.
Language英语
WOS IDWOS:000347139400078
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/143768
Collection中国科学院大连化学物理研究所
Corresponding Author哥德巴赫
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Lingfang,Goldbach, Andreas,Bao, Chun,et al. Structural and Permeation Kinetic Correlations in PdCuAg Membranes[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(24):22408-22416.
APA Zhao, Lingfang,Goldbach, Andreas,Bao, Chun,Xu, Hengyong,&哥德巴赫.(2014).Structural and Permeation Kinetic Correlations in PdCuAg Membranes.ACS APPLIED MATERIALS & INTERFACES,6(24),22408-22416.
MLA Zhao, Lingfang,et al."Structural and Permeation Kinetic Correlations in PdCuAg Membranes".ACS APPLIED MATERIALS & INTERFACES 6.24(2014):22408-22416.
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