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24 August 2010 Hydrogen generation by the reaction of oxide-modified aluminum powders with tap water
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Abstract
For the first time, TiO2 nanopowders were used as a modifier for the metal Al powders in the reaction with ordinary tap water to generate hydrogen at ambient temperature. The present study systematically investigated the effect of additives such as Al(OH)3, AlO(OH), α-Al2O3, γ-Al2O3, SiO2, CaO, Fe2O3, WO3, and four different TiO2 ceramic powders on the promotion of hydrogen generation in the reaction of metal Al powders and tap water. Effect of mechanical ball-mixing was also evaluated. It was found that AlO(OH), CaO, α-Al2O3and TiO2 (P90) powders were very effective to facilitate the hydrogen production from the reaction of metal Al powders and tap water under ambient condition. TiO2 (P90) nanopowders exhibited a slightly better effect than those of α-Al2O3in the facilitation of hydrogen generation from water splitting. The generation of hydrogen from the reaction of modified Al powders and water was found to be dependent on the sizes of metal Al powders, the modifiers, the size of the modifiers, weight ratio of metal Al powders to the modifiers, and ball-milling durations. Further studies are required to fully understand the contradictory behaviors to the previously known mechanism.
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Hong-Wen Wang and Hsing-Wei Chung "Hydrogen generation by the reaction of oxide-modified aluminum powders with tap water", Proc. SPIE 7770, Solar Hydrogen and Nanotechnology V, 77701E (24 August 2010); https://doi.org/10.1117/12.862725
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