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TitleNanostructured alumina ceramic membranes for hydrogen separation
Publication TypeConference Paper
Year of Publication2008
AuthorsBrown, I.W.M., Bowden M.E., Jay E., Kemmitt T., Kirchner A., Mackenzie K.J.D., and Smith G.
Conference NameA Global Road Map for Ceramic Materials and Technologies: Forecasting the Future of Ceramics, International Ceramic Federation - 2nd International Congress on Ceramics, ICC 2008, Final Programme
Date Published2008
KeywordsAcid electrolytes, Alumina, Alumina ceramic membrane, Alumina template, Aluminum foil, Anodic alumina membranes, Anodic alumina template, Anodising, Ceramic materials, Ceramic membranes, Chemical stability, Chemical techniques, Electrolytes, Elevated temperature, Hard anodising, High-purity, hydrogen, Hydrogen separation, Nano-structured, Nanorods, Palladium, Physical stability, Separation, Structural transformation, Thermal development
AbstractNanostructured anodic alumina membranes have been fabricated from templates prepared by anodising annealed high-purity aluminium foil, using both mild anodising conditions (25V, 0.3M H2SO4 electrolyte) and hard anodising conditions (150V, 0.3M H2C2O4 electrolyte). The thermal development and structural transformations of these alumina templates have been compared. These results show that species substituted in the alumina lattice from decomposition of the acid electrolyte play a major role in determining the chemical and physical stability of the membrane at elevated temperatures. Solution chemical techniques have been used to deposit nanorods of palladium metal up to 200nm long in the surface of the anodic alumina template, creating a continuous membrane with the potential to separate and purify hydrogen at elevated temperature.

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