Plasmonic Photocatalysis with Chemically and Spatially Specific Antenna-Dual Reactor Complexes.

Area of Science:

• Materials Science
• Photocatalysis
• Nanotechnology

Background:

• Plasmonic antenna-reactor photocatalysts efficiently convert light to chemical energy.
• Previous studies focused on simple reactions with single reaction sites.

Purpose of the Study:

• Investigate a planar aluminum (Al) nanodisk antenna with two distinct active sites (palladium and iron nanodisks).
• Explore photocatalytic reactions H₂ + D₂ → 2HD and NH₃ + D₂ → NH₂D + HD on nanostructured complexes.
• Examine the influence of reactor nanodisk configuration (90° and 180° trimer) on reaction outcomes.

Main Methods:

• Fabrication of planar Al nanodisk antennas with integrated Pd and Fe nanodisks in trimer configurations.
• Investigation of H₂-D₂ exchange and NH₃ + D₂ reactions using these nanostructured photocatalysts.
• Analysis of reaction behavior based on the spatial arrangement of active sites.

Main Results:

• H₂-D₂ exchange reaction exhibited additive behavior in the linear (180°) configuration.
• NH₃ + D₂ reaction demonstrated a synergistic effect influenced by reactor nanodisk positioning relative to the Al antenna.
• The study achieved chemical and spatial control over light-driven reactions.

Conclusions:

• Precisely designed antennas with multiple reactors enable tailored control of increasingly complex chemical reactions.
• This work highlights the potential for advanced photocatalysis with spatially and chemically controlled reaction steps.