Fig. 3: Potential-dependence of eCO2RR selectivity, in situ nano-XAS setup, and in situ XANES spectra of the Cu-Ag model catalyst. | Nature Communications

Fig. 3: Potential-dependence of eCO2RR selectivity, in situ nano-XAS setup, and in situ XANES spectra of the Cu-Ag model catalyst.

From: Unraveling the synergistic effects of Cu-Ag tandem catalysts during electrochemical CO2 reduction using nanofocused X-ray probes

Fig. 3

a Potential-dependent Faradaic efficiencies of Cu0.88Ag0.12 in eCO2RR in an H-cell setup in CO2-saturated 0.1 M KHCO3 electrolyte. b Schematic illustration of the developed nano-XAS setup at ID16B-ESRF beamline for the ___location- and potential-resolved acquisition of XANES data. c In situ Cu-K-edge XANES spectra (normalized) of individual Cu0.88Ag0.12 NPs during eCO2RR and d corresponding first derivatives (normalized). As a reference, a Cu0 metal foil was investigated in a dry state without any applied potential. Note that all potentials were converted to the RHE scale and 100% iR-compensated. Error bars in a represent standard deviations for triplicate experiments.

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