Fig. 3: Insights into CO2RR mechanism from the reaction kinetics perspective and corresponding Operando Raman spectroscopy distinction. | Nature Communications

Fig. 3: Insights into CO2RR mechanism from the reaction kinetics perspective and corresponding Operando Raman spectroscopy distinction.

From: Direct low concentration CO2 electroreduction to multicarbon products via rate-determining step tuning

Fig. 3: Insights into CO2RR mechanism from the reaction kinetics perspective and corresponding Operando Raman spectroscopy distinction.The alternative text for this image may have been generated using AI.

Tafel plots of the HB Cu’s partial current density for H2 production (a), CO evolution (b), and C2H4 production (c) under varying CO2 purities in 1 M KOH at 25 °C. There is no iR correction for voltages. Operando Raman spectroscopy of HB Cu under pure CO2 condition (d) and 5% CO2 feedstock condition (e) over a range of potentials. f Peak *CO and *CO2− intensity during CO2RR on HB Cu under 5% CO2 feedstock condition (orange lines) and pure CO2 condition (blue lines). g Proposed rate-determining reaction mechanisms for CO2RR on rich Cu0/Cu1+ interface surface(left) and poor Cu0/Cu1+ interface surface(right). Source data are provided as a Source Data file.

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