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Real-time monitoring of metal deposition and segregation phenomena during preparation of PdCu membranes
Yuan, Lixiang; Goldbach, Andreas; Xu, Hengyrong; 哥德巴赫; 哥德巴赫
KeywordPdcu Membrane h(2) Permeation Segregation Gas Evolution Electroless Plating
Source PublicationJOURNAL OF MEMBRANE SCIENCE
2008-09-01
DOI10.1016/j.memsci.2008.04.067
Volume322Issue:1Pages:39-45
Indexed BySCI
SubtypeArticle
Department8
Funding Project801
Contribution Rank1;1
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectEngineering, Chemical ; Polymer Science
WOS Research AreaEngineering ; Polymer Science
WOS KeywordPOROUS STAINLESS-STEEL ; COMPOSITE MEMBRANES ; HYDROGEN ; SEPARATION ; DIFFUSION ; TRANSPORT ; H-2
AbstractThe N(2) and H(2) evolution, respectively, were monitored during deposition of Pd and Cu from electroless plating baths to obtain in-process control of the composition during preparation of 3-7 mu m thick PdCu membranes on tubular ceramic substrates. Compositions estimated by gas evolution compare favorably to those measured in post-mortem XRD and EDS analyses, mostly differing by not more than 1 at.%. This result suggests that use of gas evolution measurements to enable in-process control of composition to within 1 at.% is feasible. Annealing experiments in an H(2) atmosphere demonstrated that, at 893 K. only 48 h are needed to form a stoichiometrically homogeneous, 9.5 mu m thick, face centered cubic (fcc) Pd(63)Cu(37) membrane from sequentially deposited layers; at 723 K, the same transformation requires over 2 weeks. The appearance of transient body centered cubic (bcc) and fcc phases with lower Pd contents signaled compositional segregation in the initial stages of alloy formation at 723 and 773 K and could be a source of persistent stoichiometric heterogeneity particularly in bcc PdCu membranes. The H(2) fluxes of fcc Pd(58)Cu(42) and Pd(70)Cu(30) membranes were J(H2) = (1.6 +/- 1.1) mol m(-2) s(-1) exp[(-24.8 +/- 0.4)kJ mol(-1) /RT] and J(H2) = (3.7 +/- 0.6) mol m(-2) s(-1) exp[(-21.3 +/- 1.0)kJ mol(-1)/RT], respectively, at 100 kPa H(2) pressure difference. (c) 2008 Elsevier B.V. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000259014400006
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/100565
Collection中国科学院大连化学物理研究所
Corresponding Author哥德巴赫; 哥德巴赫
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Lab Appl Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Lixiang,Goldbach, Andreas,Xu, Hengyrong,et al. Real-time monitoring of metal deposition and segregation phenomena during preparation of PdCu membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2008,322(1):39-45.
APA Yuan, Lixiang,Goldbach, Andreas,Xu, Hengyrong,哥德巴赫,&哥德巴赫.(2008).Real-time monitoring of metal deposition and segregation phenomena during preparation of PdCu membranes.JOURNAL OF MEMBRANE SCIENCE,322(1),39-45.
MLA Yuan, Lixiang,et al."Real-time monitoring of metal deposition and segregation phenomena during preparation of PdCu membranes".JOURNAL OF MEMBRANE SCIENCE 322.1(2008):39-45.
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