Preparation and performance of thin-layered PdAu/ceramic composite membranes

	Preparation and performance of thin-layered PdAu/ceramic composite membranes
	Shi, Lei; Goldbach, Andreas; Zeng, Gaofeng; Xu, Hengyong
刊名	international journal of hydrogen energy
	2010-05-01
卷号	35 期号:9 页码:4201-4208
关键词	PdAu membrane Au electroless plating PdAu alloying H(2) permeation Membrane stability
通讯作者	哥德巴赫 ; 徐恒泳
产权排序	1;1
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.
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
关键词[WOS]	hydrogen-production ; pdcu membranes ; palladium ; alloys ; gold ; segregation ; ag
收录类别	SCI
原文出处	false
语种	英语
WOS记录号	WOS:000277857600031
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/103081]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 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.(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.