In Situ Temperature-Modulated Electrochemical Surface-Enhanced Raman Spectroscopy Study of the Effect of *CO on Metal Surface

We used a high-frequency heating technique combined withelectrochemicalsurface-enhanced Raman spectroscopy to study the temperature-dependentelectrooxidation reaction of methanol/ethanol and electrochemicalcarbon dioxide reduction (CO2RR). The results showed thatwith the increase of temperature, the Raman intensity of Pt-Cslowly decreased, indicating that the high temperature favors theoxidative desorption of *CO on the Pt surface to promote the catalyticreaction. Meanwhile, during the process of CO2 to CO onPd, the ratio of linearly bonded CO (weak adsorption) to bridge-bondedCO (strong adsorption) gradually increased with increasing temperature,indicating that the high temperature facilitated the desorption of*CO on the Pd surface and reduced the toxicity of CO. The presentresults provide a molecular-level insight into the effect of temperaturemodulation on *CO on the Pt surface (alcohol oxidation) and the Pdsurface (CO2RR), which can deepen the understanding ofthe interfacial redox mechanism.