| 摘要 |
A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.
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