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Characterization and Performance of High-Flux PdAu/Ceramic Composite Membranes
Shi Lei1,2; Zeng Gaofeng1,2; Xu Hengyong1
KeywordElectroless Plating Cyanide-free Electroless Gold Plating Palladium-gold Composite Membrane Palladium-gold Alloy Hydrogen Permeation
Source PublicationCHINESE JOURNAL OF CATALYSIS
2010-06-01
DOI10.3724/SP.J.1088.2010.91213
Volume31Issue:6Pages:711-715
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordGOLD-PALLADIUM ALLOYS ; HYDROGEN PERMEATION ; H-2 ; ELECTROLESS ; SEGREGATION
AbstractA 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.
Language英语
WOS IDWOS:000279808000020
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142236
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Shi Lei,Zeng Gaofeng,&Xu Hengyong.(2010).Characterization and Performance of High-Flux PdAu/Ceramic Composite Membranes.CHINESE JOURNAL OF CATALYSIS,31(6),711-715.
MLA Shi Lei,et al."Characterization and Performance of High-Flux PdAu/Ceramic Composite Membranes".CHINESE JOURNAL OF CATALYSIS 31.6(2010):711-715.
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