Fig. 5: Electrochemical results.

a CO₂ electrolysis performance of SFRuM-GDC cell after six redox cycles at 800 °C and 1.2 V. b The corresponding in situ EIS results. c DRT spectra of the RuFe alloy NPs decorated cells calculated from b. d Stability test of SFRuM-GDC R2 cell and CO Faradaic efficiencies at 800 °C and 1.2 V.