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题名: Characterization and Performance of High-Flux PdAu/Ceramic Composite Membranes
作者: Shi Lei1, 2;  Zeng Gaofeng1, 2;  Xu Hengyong1
关键词: electroless plating ;  cyanide-free electroless gold plating ;  palladium-gold composite membrane ;  palladium-gold alloy ;  hydrogen permeation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010-06-01
DOI: 10.3724/SP.J.1088.2010.91213
卷: 31, 期:6, 页:711-715
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A PdAu membrane was prepared by sequential electroless plating of Pd and Au onto the outside surface of porous gamma-Al(2)O(3) substrate followed by annealing and H(2)/N(2) performance evaluation. X-ray diffraction was employed to study the PdAu alloy phase formation at 823 K under H(2) and N(2) atmospheres. Annealing experiments demonstrated that 200 h was needed to form a stoichiometrically homogeneous, 2-mu m thick Pd(82.63)Am(17.37) membrane from sequentially deposited layers at 823 K and a noticeable particle agglomeration was observed under N(2) atmosphere. The performance of the PdAu alloy membrane was evaluated with respect to the H(2) flux and permselectivity between 823 and 423 K, which showed that the PdAu alloy membrane had higher H2 flux and lower activation energy than those of pure Pd membrane. The activation energy in the high temperature range is consistent with bulk diffusion-limited H2 transport, while the changes of these characteristics at lower temperatures below 573 K indicate desorption or surface limited H2 flux. After the conclusion of gas studies, the PdAu membrane was broken, the thickness and composition of the PdAu layers were determined by SEM and EDX completely.
关键词[WOS]: GOLD-PALLADIUM ALLOYS ;  HYDROGEN PERMEATION ;  H-2 ;  ELECTROLESS ;  SEGREGATION
语种: 英语
WOS记录号: WOS:000279808000020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142236
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, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Shi Lei,Zeng Gaofeng,Xu Hengyong. Characterization and Performance of High-Flux PdAu/Ceramic Composite Membranes[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(6):711-715.
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