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学科主题物理化学
Structural and Permeation Kinetic Correlations in PdCuAg Membranes
Zhao, Lingfang; Goldbach, Andreas; Bao, Chun; Xu, Hengyong; 哥德巴赫
关键词Hydrogen Separation Ternary Alloy Vegard's Law Kinetic Compensation Structure-function Relationship
刊名ACS APPLIED MATERIALS & INTERFACES
2014-12-24
DOI10.1021/am506439x
6期:24页:22408-22416
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Science & Technology - Other Topics ; Materials Science
关键词[WOS]HYDROGEN SEPARATION MEMBRANES ; LOW-TEMPERATURE H-2 ; ALLOY MEMBRANES ; ELEVATED-TEMPERATURES ; MATHEMATICAL ORIGINS ; PALLADIUM MEMBRANES ; TERNARY ALLOY ; PD ; TRANSPORT ; SOLUBILITY
英文摘要Addition 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.
语种英语
WOS记录号WOS:000347139400078
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/143768
专题中国科学院大连化学物理研究所
通讯作者哥德巴赫
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
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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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