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Permeation and in situ XRD studies on PdCuAu membranes under H-2
Jia, Haiyuan1,2; Goldbach, Andreas1; Zhao, Chenyang1,2; Castro, German R.3,4; Sun, Chenglin1; Xu, Hengyong1
KeywordTernary Alloy Hydrogen Permeation Hydride Phases Miscibility Gap Homogeneity
Source PublicationJOURNAL OF MEMBRANE SCIENCE
2017-05-01
ISSN0376-7388
DOI10.1016/j.memsci.2017.01.062
Volume529Pages:142-149
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectEngineering, Chemical ; Polymer Science
WOS Research AreaEngineering ; Polymer Science
WOS KeywordPALLADIUM-COPPER ALLOYS ; SOLID-SOLUTION ALLOYS ; MASS-FLOW RESISTANCE ; HYDROGEN SEPARATION ; COMPOSITE MEMBRANES ; PD MEMBRANES ; THIN-FILMS ; CU ; PERMEABILITY ; PERFORMANCE
AbstractPdCuAu membranes are interesting tools for H-2 separation especially from sulfur contaminated mixtures. We have studied the preparation of such membranes on ceramic supports via electroless plating and examined their permeation behavior. Alloying of the separately deposited metals was time consuming at 500 degrees C under H-2. Hydrogen permeability improved and the associated activation energy became smaller with increasing Au and decreasing Cu content of the alloys. The low-temperature alpha/beta hydride miscibility gap was examined by in situ synchrotron radiation X-ray diffraction (SR-XRD) under H-2 employing PdCuAu samples alloyed at 800 degrees C under N-2. The gap narrowed with decreasing Pd amount and was reduced stronger by Au addition. This two-phase regime extended beyond 125 degrees C in hydrogenated Pd87Cu7Au6. Results from Cu-rich alloys indicate that it can be completely suppressed at room temperature through proper balance of Au and Cu in alloys containing less than 75% Pd. Hence, the risk of embrittlement due to formation of incommensurate alpha and beta hydride phases can be largely mitigated and Au addition to PdCu alloys benefits the low-temperature stability of such membranes. Moreover, the SR-XRD experiments under H-2 uncovered distinct alloys with very similar lattice parameters but differing hydrogen solubility in two Cu-rich samples demonstrating that such in situ studies are very useful for probing the homogeneity of multicomponent alloys.
Language英语
WOS IDWOS:000398009800015
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169399
Collection中国科学院大连化学物理研究所
Corresponding AuthorGoldbach, Andreas; Sun, Chenglin
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Spanish CRG BM25 Beamline ESRF European Synchrotr, SpLine, 71 Ave Martyrs, F-38000 Grenoble, France
4.CSIC, ICMM, E-28049 Canto Blanco, Spain
Recommended Citation
GB/T 7714
Jia, Haiyuan,Goldbach, Andreas,Zhao, Chenyang,et al. Permeation and in situ XRD studies on PdCuAu membranes under H-2[J]. JOURNAL OF MEMBRANE SCIENCE,2017,529:142-149.
APA Jia, Haiyuan,Goldbach, Andreas,Zhao, Chenyang,Castro, German R.,Sun, Chenglin,&Xu, Hengyong.(2017).Permeation and in situ XRD studies on PdCuAu membranes under H-2.JOURNAL OF MEMBRANE SCIENCE,529,142-149.
MLA Jia, Haiyuan,et al."Permeation and in situ XRD studies on PdCuAu membranes under H-2".JOURNAL OF MEMBRANE SCIENCE 529(2017):142-149.
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