113學年材料系-第六週 專題研討課程 演講公告 (113年10月21日)
2024.10.21
Near infrared energy remains untapped toward the maneuvering of entire solar spectrum harvesting for fulfilling the nuts and bolts of solar hydrogen production. We report the use yolk@shell nanocrystals as dual plasmonic photocatalysts to achieve remarkable hydrogen production under visible and near infrared illumination. Ultrafast spectroscopic data reveal the prevalence of long-lived charge separation states for Au@Cu7S4 under both visible and near infrared excitation. Combined with the advantageous features of yolk@shell nanostructures, it is possible to achieve a peak a record-breaking quantum yield for hydrogen production in the absence of additional co-catalysts. The design of a sustainable visible- and near infrared-responsive photocatalytic system is expected to inspire further widespread applications in solar fuel generation. In this work, the feasibility of exploiting the localized surface plasmon resonance property of self-doped, nonstoichiometric semiconductor nanocrystals for the realization of wide-spectrum-driven photocatalysis is highlighted. The current study not only delivers a new type of plasmonic photocatalyst paradigms enabling efficient H2 production from the untapped near infrared energy, but also illustrates the utility of the novel yolk@shell nanostructures in plasmonic photocatalysis. The finding of this work offers a promising strategy to the expansion of the photo response range for the currently available photocatalysts in order to realize full-spectrum driven solar H2 production.