A novel symmetrical solid oxide electrolysis cell (S-SOEC) utilizing a spinel structured MnCo 2 O 4 electrode is investigated for pure CO 2 electrolysis. The electrode is prepared through an impregnation method and is confirmed to have excellent performance for CO 2 electrolysis, with a current density of 0.75 A cm À 2 at an applied voltage of 1.5 V at 800°C. The MnCo 2 O 4 electrodes also show good stability for long-term pure CO 2 electrolysis for more than 80 h. The study suggests that MnCo 2 O 4 is a potential electrode for pure CO 2 electrolysis in S-SOECs.
In this study, in situ exsolved Ni–Ba(Ce0.9Y0.1)0.8Ni0.2O3−δ+Gd0.1Ce0.9O1.9 (Ni–BCYN+GDC)
perovskite anode is studied for application in hydrocarbon-fueled
solid oxide fuel cell (SOFC). The electrocatalytic activities of the
oxidation reaction of anode in hydrogen and methane atmospheres are
studied. The results show that the surface-exsolved Ni nanoparticles
can significantly improve the electrochemical properties of the anode.
The polarization resistances of the studied anode in hydrogen and
methane atmospheres at 750 °C are as low as 0.0042 and 0.0054
Ω·cm–2, respectively. At the same time,
a 36 h short-term open-circuit voltage test under a methane atmosphere
confirms that the Ni–BCYN+GDC composite anode exhibits a good
carbon deposition resistance. These results demonstrate that the Ni–BCYN+GDC
composite anode is a potential novel anode material candidate for
hydrocarbon-fueled SOFC.
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