Fig. 3: Investigations on the Pd-H phase transition. | Nature Communications

Fig. 3: Investigations on the Pd-H phase transition.

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

Fig. 3: Investigations on the Pd-H phase transition.

In situ PXRD conducted in CO2-saturated 0.1 M KHCO3 of a PdC60 and b PdC, and standard PXRD patterns of Pd and PdH. The rapid peak transition happens at ~ −0.6 V and −0.3 V, respectively. c Pd (111) peak position (black lines) of PdC60 and PdC, and the corresponding FEFormate (red lines) as the function of the cathodic potential. d H desorption CVs on PdC60, PdC and PdNPs in Ar-saturated 0.1 M KHCO3 with the scan rate of 10 mV s−1. H desorption/adsorption on PdC60 occurs at less anodic potentials. The reactions were conducted at 25 °C. 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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