Rapid hydrogen generation from aluminum–water system by adjusting water ratio to various aluminum/aluminum hydroxide

摘要

The effect of Al(OH)~(3)on the hydrogen generation from Al/water system is evaluated. Four synthesized and one commercial Al(OH)~(3)powders are employed to investigate their assistance to the hydrogen generation from Al/water system at room temperature. It was found that the Al(OH)~(3)product derived from Al(NO)~(3)precursor exhibits the best catalytic effect and exerts the highest hydrogen generation rate. 100?% yield of hydrogen (1,360?ml/g Al at 25?°C) can be achieved within 6?min at a proper Al:Al(OH)~(3):H~(2)O weight ratio (3:15:50). That is, by adjusting Al:Al(OH)~(3):H~(2)O ratio, the highest hydrogen generation rate ever reported so far, without using any alloying elements or corrosive additives, can be achieved.