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submitted on 12.05.2020 and posted on 13.05.2020by Spencer Wallentine, Savini Bandaranayake, Somnath Biswas, L. Robert Baker
We present a vibrational sum frequency generation method to probe the Au/electrolyte interface with a detection limit of < 1% of a monolayer, and with currents exceeding 1 mA/cm2 during CO2 reduction. We couple light to the interface using momentum relaxed surface plasmon resonance. Using this technique we make in-situ measurements of catalytic CO with good signal-to-noise and at high current density.