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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >In situ sum-frequency vibrational spectroscopy of electrochemical interfaces with surface plasmon resonance
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In situ sum-frequency vibrational spectroscopy of electrochemical interfaces with surface plasmon resonance

机译：In situ sum-frequency vibrational spectroscopy of electrochemical interfaces with surface plasmon resonance

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摘要

Electrochemical (EC) reactions are crucial in many applications, yet most EC analytical tools lack the sensitivity to access molecularlevel information of reactants and products. By combining sumfrequency vibrational spectroscopy and surface plasmon resonance at EC interfaces, we demonstrate the feasibility of measuring in situ and real-time vibrational spectra during EC reactions at noble metal electrodes. Application of the technique to EC reactions at a gold surface helps in understanding how the surface in a basic solution is oxidized and reduced during a cyclic voltammetry cycle. Study of desorption of a thiol self-assembled monolayer from gold through EC reactions in a basic solution shows that the desorbed thiols by reductive reaction remain as an ordered layer near the gold interface, but do diffuse away if they are desorbed oxidatively from gold.

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