Synergistic bio-inspired photocatalytic hydrogen production by chlorophyll derivative sensitized Nb2CTx MXene nanosheets†

The pursuit of sustainable energy sources has become imperative in light of the environmental and strategic challenges posed by fossil fuel dependency. This study presents a novel approach to photocatalytic hydrogen production using a composite system comprising chlorophyll derivative (Chl) and monolayer Nb₂CT_x MXene nanosheets. Through a series of experimental and theoretical investigations, we elucidate the intricate interplay between Chl and MXene in driving efficient hydrogen production under visible light irradiation. Our results demonstrate the superior photocatalytic performance of the Chl@Nb₂CT_x composite, attributed to the enhanced charge transfer facilitated by MXene and the wide-range light absorption of Chl. Corresponding electrochemical and photochemical experiments further unveil the underlying reaction mechanism, emphasizing the role of Chl as a photocatalyst and MXene as a co-catalyst. This synergistic combination offers a promising avenue for sustainable hydrogen production, free from the limitations of precious metal catalysts and fossil fuel dependence.