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Preparation and performance of thin-layered PdAu/ceramic composite membranes
Shi, Lei; Goldbach, Andreas; Zeng, Gaofeng; Xu, Hengyong; 哥德巴赫; Xu HY(徐恒泳)
KeywordPdau Membrane Au Electroless Plating Pdau Alloying h(2) Permeation Membrane Stability
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2010-05-01
DOI10.1016/j.ijhydene.2010.02.048
Volume35Issue:9Pages:4201-4208
Indexed BySCI
SubtypeArticle
Department8
Funding Project801
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
WOS KeywordHYDROGEN-PRODUCTION ; PDCU MEMBRANES ; PALLADIUM ; ALLOYS ; GOLD ; SEGREGATION ; AG
AbstractPreparation of 3-5 mu m thick, hydrogen-selective PdAu layers via sequential electroless plating of Pd and Au onto ceramic microfiltration membranes was investigated employing a cyanide-free Au plating bath. The Au deposition rate was strongly dependent on bath temperature and alkalinity reaching an optimum at 333 K and pH 10. Homogenous alloying of the separate metal layers under atmospheric H(2) proved to be a protracted process and required approximately a week at 873 K for a PdAu layer as thin as 3 gm. After 300 h annealing at 823 K the 5 gm thick PdAu layer of a composite membrane still exhibited a Au gradient declining from 7.4 at.% at the top surface to 5.5 at.% at the support interface despite that the H(2) permeation rate had become stable. Nonetheless, the membrane exhibited a very high H(2) permeability of e.g. 1.3 x 10(-8) mol m m(-2) s(-1) Pa(-0.5) at 673 K, but it decreased much faster with temperature below 573 K than above, likely due to a change from bulk H diffusion-controlled to H(2) adsorption or desorption-limited transport. The composite membrane withstood cycling between 523 and 723 K in H(2) well showing that differing thermal expansion of the joined metallic and ceramic materials stayed within the tolerance range up to 723 K. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000277857600031
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/103081
Collection中国科学院大连化学物理研究所
Corresponding Author哥德巴赫; Xu HY(徐恒泳)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Shi, Lei,Goldbach, Andreas,Zeng, Gaofeng,et al. Preparation and performance of thin-layered PdAu/ceramic composite membranes[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(9):4201-4208.
APA Shi, Lei,Goldbach, Andreas,Zeng, Gaofeng,Xu, Hengyong,哥德巴赫,&徐恒泳.(2010).Preparation and performance of thin-layered PdAu/ceramic composite membranes.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,35(9),4201-4208.
MLA Shi, Lei,et al."Preparation and performance of thin-layered PdAu/ceramic composite membranes".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35.9(2010):4201-4208.
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