Tuning the Reactivity of Al@TiO<sub>2</sub> Antenna-Reactor Plasmonic Photocatalysts by Controlling Oxygen Vacancies.
basic_science · Level V
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- Record sourced from PubMed, PMID 40853078.
- Also identified by DOI 10.1021/acs.nanolett.5c03450.
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Abstract
Oxygen vacancies on a metal oxide surface enhance its catalytic activity. Here we investigate the controlled introduction of oxygen vacancies on core-shell Al@TiO<sub>2</sub> antenna-reactor nanoparticle photocatalysts. Thermal annealing in an H<sub>2</sub>-reducing atmosphere creates more oxygen vacancies in the surface TiO<sub>2</sub> layer of Al@TiO<sub>2</sub> nanoparticles compared to the same process under inert (He) or oxidative (O<sub>2</sub>) ambients. The photocatalytic reactivity enhancement was evaluated by investigating two reactions: hole-mediated methanol decomposition and electron-mediated hydrogen dissociation. The ability to modify plasmonic nanoparticle photocatalyst reactivity in this simple and controllable manner demonstrates the potential of this approach to tailor and enhance the performance of plasmonic antenna-reactor photocatalysts.