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Triggering comprehensive enhancement in oxygen evolution reaction by using newly created solvent.

Hsiao-Chien Chen1, Fu-Der Mai1, Kuang-Hsuan Yang2

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Plasmon-induced activated water, with a unique structure and higher chemical potential, significantly enhances oxygen evolution reactions (OER). This innovative approach boosts OER efficiency across various conditions, offering a new pathway for catalysis.

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Area of Science:

  • Surface Chemistry
  • Nanocatalysis
  • Electrocatalysis

Background:

  • Properties of confined water differ significantly from bulk water.
  • Oxygen evolution reaction (OER) is crucial for energy conversion but often limited by efficiency.

Purpose of the Study:

  • To develop an efficient strategy for oxygen evolution reaction (OER) using plasmon-induced activated water.
  • To investigate the impact of activated water on OER performance at different electrolyte conditions.

Main Methods:

  • Generation of activated water via hot electron decay from resonantly illuminated gold nanoparticles (Au NPs).
  • Experimental evaluation of OER efficiency using platinum (Pt) electrodes in acidic, neutral, and alkaline electrolytes with activated water.
  • Assessment of activated water's effectiveness in photoelectrocatalytic and inert systems, including in situ preparation on roughened Au electrodes.

Main Results:

  • Activated water exhibits a reduced hydrogen-bonded structure and higher chemical potential compared to deionized (DI) water.
  • OER efficiencies increased by 69.3% (acidic), 21.1% (neutral), and 14.5% (alkaline) in activated water-based solutions versus DI water.
  • A 47.5% increase in OER efficiency was observed in activated water prepared in situ on a roughened Au electrode.

Conclusions:

  • Plasmon-induced activated water serves as an effective intrinsic activator for OER.
  • The unique properties of activated water lower the OER activation energy, enhancing reaction rates.
  • This approach offers a novel and comprehensively effective strategy for improving OER performance in diverse catalytic systems.