Hydrogen generation by the reaction of Al with water promoted by an ultrasonically prepared Al(OH)3 suspension

Published on Nov 11, 2014in International Journal of Hydrogen Energy4.939
· DOI :10.1016/J.IJHYDENE.2014.09.085
Yang Yang4
Estimated H-index: 4
(SHU: Shanghai University),
Wei-Zhuo Gai11
Estimated H-index: 11
(SHU: Shanghai University)
+ 1 AuthorsJian-Ge Zhou6
Estimated H-index: 6
(JSU: Jackson State University)
Abstract A high-activity Al(OH) 3 suspension is prepared by the reaction of Al with water using an ultrasonic procedure. The above Al(OH) 3 suspension could considerably promote the Al-water reaction and hydrogen-generation under ambient condition. This Al(OH) 3 suspension has a good stability in air and its activity increases with decreasing the particle sizes of Al powder to prepare it. The mechanism analyses reveal that the Al(OH) 3 particles in ultrasonically prepared Al(OH) 3 suspensions are very fine, which could effectively dissociate water molecules and promote the hydration of the passive oxide film on Al particle surfaces, speeding up the Al-water reaction. As the present Al(OH) 3 suspension is chemically neutral and there is no special treatment for Al powder, the present method provides a viable way to generate hydrogen for portable application.
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