CO₂ Reduction on Doped-Ceria Electrodes: Controlling CO selectivity and coking with Applied Bias

Key Points

• This research aims to explore the effects of doping ceria electrodes on CO selectivity and carbon deposition during CO₂ electrolysis.
• Utilized mixed ionic-electronic conducting CeOₓ-YSZ electrodes doped with trivalent cations.
• Conducted operando Raman spectroscopy to monitor catalytic performance.
• Applied varying electrical biases to assess their impact on CO selectivity and coking.
• Doping with trivalent cations enhanced catalytic activity and controlled syngas stoichiometry.
• Controlled applied bias effectively reduced carbon deposition (coking) during CO₂ electrolysis.
• Achieved higher CO selectivity under optimal conditions.