Publication date: 10th April 2024
In our previous work, the CeO2 nanoparticles (NPs) decorated La0.43Ca0.37Ti0.94Ni0.06O3-δ (denoted as LCTN-Ce) electrode showed an excellent electrochemical performance of CO2 electrolysis with solid oxide cells (SOCs).[1] Herein, the effect of surface decorated CeO2 amount on the reversible SOC (RSOC) performance has been investigated in 50% CO2/50% H2 at 750 °C. Results show that with the increase of CeO2 amount, the single cell assembled with LCTN-Ce electrode (denoted as LCTN-Ce cell) exhibits a significantly enhanced CO2 electrolysis performance, owing to the increased oxygen vacancy concentration. While the output performance of LCTN-Ce cell increases first and then decreases, which is attributed to the reduced electrode conductivity. The maximum power density is measured to be ~350 mW cm-2 over LCTN-Ce005M-4h cell. Furthermore, this cell displayed a short-term stability for 12 h under the reversible operation of SOFC mode with a constant current load of 125 mA cm-2 and SOEC mode with a constant current load of 360 mA cm-2.
This work was supported by the Foshan Postdoctoral Project (XHQN2022-010) and Foshan Xianhu Laboratory Project (XHRD2023-001).
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