Fig. 5: Investigating the potential-driven phase/performance evolutions in Pd-catalyzed CO2R. | Nature Communications

Fig. 5: Investigating the potential-driven phase/performance evolutions in Pd-catalyzed CO2R.

From: Unlocking cathodic potential dependent Pd deactivation for energy efficient CO2 electroreduction to formate

Fig. 5

Potential-dependent Pd-Pd distance and CO poisoning (from both CVs and in situ ATR-SEIRAS) on a PdC60 and b PdC. c In situ ATR-SEIRAS of PdC60 during potentiostatic CO2R electrolysis at −1.1 V. d In situ ATR-SEIRAS of PdC60 during CO stripping CVs after electrolysis at −1.1 V. α and β represent CO stripping peaks on α-PdH and β-PdH, respectively. The reactions were conducted in CO2-saturated 0.1 M KHCO3 and at 25 °C. e Illustration of the proposed potential-driven evolution process in Pd-catalyzed CO2R. Gray: Pd; Red: H; COH (blue): hollow site *CO adsorption on α-PdH; COB (red): bridge site *CO adsorption on β-PdH. Typical solution resistance for 0.1 M KHCO3 was measured to be 11.9 Ω ± 1.5 Ω. 100% iR compensation was applied for all cathodic potentials. Source data are provided as a Source data file.

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