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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 438216, 10 pages
http://dx.doi.org/10.1155/2014/438216
Research Article

Development of Pd Alloy Hydrogen Separation Membranes with Dense/Porous Hybrid Structure for High Hydrogen Perm-Selectivity

1Department of Advanced Materials Engineering, Kyonggi University, Gyeonggi-do 443-760, Republic of Korea
2Department of SDM (Semiconductor Display Mechatronics), Kyonggi University, Gyeonggi-do 443-760, Republic of Korea
3School of Energy, Materials & Chemical Engineering, Korea University of Technology and Education, Chungcheongnam-do 330-760, Republic of Korea

Received 14 July 2014; Revised 16 September 2014; Accepted 17 September 2014; Published 13 October 2014

Academic Editor: Zoe Barber

Copyright © 2014 Jae-Yun Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

For the commercial applications of hydrogen separation membranes, both high hydrogen selectivity and permeability (i.e., perm-selectivity) are required. However, it has been difficult to fabricate thin, dense Pd alloy composite membranes on porous metal support that have a pore-free surface and an open structure at the interface between the Pd alloy films and the metal support in order to obtain the required properties simultaneously. In this study, we fabricated Pd alloy hydrogen separation membranes with dense/porous hybrid structure for high hydrogen perm-selectivity. The hydrogen selectivity of this membrane increased owing to the dense and pore-free microstructure of the membrane surface. The hydrogen permeation flux also was remarkably improved by the formation of an open microstructure with numerous open voids at the interface and by an effective reduction in the membrane thickness as a result of the porous structure formed within the Pd alloy films.