Active aluminum composites and their hydrogen generation via hydrolysis reaction: A review

Active aluminum composites are considered to be ideal materials that can be applied to mobile hydrogen sources in light of their high hydrogen generation efficiency, simple preparation, rapidly reaction rate, and non-pollution reaction products. Whereas, the dense alumina shell on the surface of the aluminum powder greatly limits the reaction between aluminum and water. This article reviews the common preparation methods, additives, reaction mechanism, aging and preservation methods of activated aluminum composites, and the latest progress in the application of active aluminum composites are also summarized. In addition, some recommendations are also given for future research work on active aluminum composites.