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Hydrogen production in the $$gamma$$-radiolysis of aqueous sulfuric acid solutions containing Al$$_{2}$$O$$_{3}$$, SiO$$_{2}$$, TiO$$_{2}$$ or ZrO$$_{2}$$ fine particles

Yamada, Reiji; Nagaishi, Ryuji ; Hatano, Yoshihiko; Yoshida, Zenko

Hydrogen production was studied in the $$gamma$$-radiolysis of aqueous H$$_{2}$$SO$$_{4}$$ solutions containing oxide powder of Al$$_{2}$$O$$_{3}$$, SiO$$_{2}$$, TiO$$_{2}$$ or ZrO$$_{2}$$. The observed yields of final product H$$_{2}$$ increased with relative amounts of oxide powder in the solutions and exhibited a particular H$$_{2}$$SO$$_{4}$$ concentration dependence, which was different for each oxide species and its amount. The addition of a small amount of CH$$_{3}$$OH to a H$$_{2}$$SO$$_{4}$$ aqueous solution with oxide powder was quite effective for increasing the final product yields of H$$_{2}$$. The obtained results revealed that heterogeneous systems composed of oxide powder and aqueous H$$_{2}$$SO$$_{4}$$ solution were more efficient for producing H$$_{2}$$ molecules in $$gamma$$-radiolysis than homogeneous systems without oxides.

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Category:Chemistry, Physical

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