LaNi5 intermetallic both as catalyst and storage compound for in situ hydrogen generation from water under visible light irradiation
Catalyse par le composé intermétallique LaNi5 et stockage in situ de l'hydrogène photoproduit à partir de l'eau sous irradiation par la lumière visible
Résumé
The intermetallic compound LaNi5 has been shown both to catalyze, under visible light irradiation, the in situ photogeneration of hydrogen from water in a model system using Ru(bpy)3 2+ as a photosensitizer, and to partially store the hydrogen so produced in the form of a hydride LaNi5Hx. The stored hydrogen can be easily released by moderate heating of the hydride. This leads to the regeneration of the catalyst that can be used again for another cycle of catalysis – partial storage – hydrogen desorption.
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