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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)
关键词Pdau Membrane Au Electroless Plating Pdau Alloying h(2) Permeation Membrane Stability
刊名INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2010-05-01
DOI10.1016/j.ijhydene.2010.02.048
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
关键词[WOS]HYDROGEN-PRODUCTION ; PDCU MEMBRANES ; PALLADIUM ; ALLOYS ; GOLD ; SEGREGATION ; AG
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.
语种英语
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WOS记录号WOS:000277857600031
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被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/103081
专题中国科学院大连化学物理研究所
通讯作者哥德巴赫; Xu HY(徐恒泳)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
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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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