Preparation And Characterization Of Hydrogen Storage Materials With Structural Nano-channels

Palygorskite was a kind of mineral hydrogen storage material with strong adsorption capacity and structural nanochannels. If we could decorate hydrogen storage metal Pd to the surface of the Pal, this compared to the undecorated Pd to the Pal, the hydrogen storage content would maybe increase. The former theoretical research indicated that the Ti decorated Carbon Nanotube would have good hydrogen storage performance. Therefore, in this paper, the hydrogen storage performance would be advanced when Pal and Carbon Nanotube were decorated with Pd and Ti.(1) The purified Pal was obtained by settlement-centrifugal separation.The hydrogen storage properties of Pal were tested. The test results showed that the purified Pal was 1.1 wt% and the unpurified Pal was 0.8wt% when the pressure of 7MPa, temperature of 298K.The hydrogen storage capacity of purified Pal 2.3wt% which was higher than unpurified Pal 1.7wt% at the same conditions(the pressure of 7MPa, temperature of 100K).Besides, the effects of mineral specific surface area and crystalline water on the hydrogen storage properties of Pal were discussed, it proved that the hydrogen storage of Pal was physical adsorption primarily.(2) Palladium Oxide decorated Pal was prepared using sol-gel method. Palladium decorated Pal was prepared by deoxidizing the former production with ormaldehyde or sodium borohydride. The phase and morphology of the production was analysised by XRD and TEM.This composite material could storage 2.35wt% hydrogen which was bigger than the undecorated Palladium hydrogen storage material 1.22wt% at room temperature and 7MPa.(3) TiO₂ decorated Carbon Nanotube was prepared using co-precipitation method. Titanium decorated Carbon Nanotube was obtained by deoxidizing the former production with calcium hydroxide. The production was characterized by XRD and TEM. The hydrogen storage property of the production was tested by PCT test instrument, This composite material could storage 3.6wt% hydrogen which was bigger than the undecorated Ti hydrogen storage material 0.6wt% at room temperature and 7MPa.(4) The method of preparing Ti decorated Carbon Nanotube using milling method was preliminary studied. The experimental results showed that Ti decorated Carbon Nanotube was obtained at the conditions of different Ti/CNT mole ratio and milling time, but greater than 6 hours. This composite material could storage 3.4wt% hydrogen at room temperature 7MPa.The research proved that the decorated hydrogen metal pal mineral and carbon nanotube content not only good adsorbent hydrogen performance, but also good hydrogen storage performance. From this point, it established the base of hydrogen storage material and the development of security , out-efficient fuel cell industrialization in the future.