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题名: Preparation and performance of thin-layered PdAu/ceramic composite membranes
作者: Shi, Lei1;  Goldbach, Andreas1;  Zeng, Gaofeng1;  Xu, Hengyong1
通讯作者: 哥德巴赫 ;  徐恒泳
关键词: PdAu membrane ;  Au electroless plating ;  PdAu alloying ;  H(2) permeation ;  Membrane stability
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010-05-01
DOI: 10.1016/j.ijhydene.2010.02.048
卷: 35, 期:9, 页:4201-4208
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 801
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: Preparation 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.
关键词[WOS]: HYDROGEN-PRODUCTION ;  PDCU MEMBRANES ;  PALLADIUM ;  ALLOYS ;  GOLD ;  SEGREGATION ;  AG
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000277857600031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103081
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
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.
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