Oxygen vacancy-intensified generation and transfer of photo-induced electron for efficient generation and orienting conversion of hydrogen

Le résumé fourni par la source

Reasonable design of high-activity catalytic sites for reducing the activation energy barrier of O–H bonds is significant for efficient conversion of hydrogen energy involving water dissociation. Herein, a coupling oxygen vacancy (VO) strategy for intensifying generation and transfer of photo-induced electron for enhancing catalytic activity of water dissociation is verified. Using ammonia borane hydrolysis as a verification, the turnover frequency of Ru-TiO2-VO (Ru-TVO) catalyst reaches up to 1614 min−1 in visible light excitation condition at 298 K, exceeding the highest activity in Ru-based catalysts. Intensified generation and transfer of photo-induced electron via coupling VO reduces the activation energy barrier of O–H bond on Ru sites, leading to a boosted intrinsic activity of Ru toward water dissociation. Ru sites enriched by photo-induced electrons also exhibit unprecedented performance in phenylacetylene hydrogenation. This work provides an effective strategy for water dissociation through VO-intensified generation and transfer of photo-induced electron in the field of energy conversion.

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