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- W2003709775 abstract "Abstract The SOEC electrodes during steam (H 2 O) electrolysis, carbon dioxide (CO 2 ) electrolysis, and the coelectrolysis of H 2 O/CO 2 are investigated. The electrochemical performance of nickel–yttria stabilised zirconia (Ni–YSZ), Ni–Gd 0.1 Ce 0.9 O 1.95 (Ni–GDC), and Ni/Ruthenium–GDC (Ni/Ru–GDC) hydrogen electrodes and La 0.8 Sr 0.2 MnO 3− δ –YSZ (LSM–YSZ), La 0.6 Sr 0.4 Co 0.8 Fe 0.2 O 3− δ (LSCF), and La 0.8 Sr 0.2 FeO 3− δ (LSF) oxygen electrodes are studied to assess the losses of each electrode relative to a reference electrode. The study is performed over a range of operating conditions, including varying the ratio of H 2 O/H 2 and CO 2 /CO (50/50 to 90/10), the operating temperature (550–800 °C), and the applied voltage. The activity of Ni–YSZ electrodes during H 2 O electrolysis is significantly lower than that for H 2 oxidation. Comparable activity for operating between the SOEC and solid oxide fuel cell (SOFC) modes is observed for the Ni–GDC and Ni/Ru–GDC. The overpotential of H 2 electrodes during CO 2 reduction increases as the CO 2 /CO ratio is increased from 50/50 to 90/10 and further increases when the electrode is exposed to a 100% CO 2 (800 °C), corresponding to the increase in the area specific resistance. The electrodes exhibit comparable performance during H 2 O electrolysis and coelectrolysis, while the electrode performance is lower in the CO 2 -electrolysis mode. The activity of all the O 2 electrodes as an SOFC cathode is higher than that as SOEC anodes. Among these O 2 electrodes, LSM–YSZ exhibits the nearest to symmetrical behaviour." @default.
- W2003709775 created "2016-06-24" @default.
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- W2003709775 date "2011-09-01" @default.
- W2003709775 modified "2023-10-17" @default.
- W2003709775 title "Electrochemical performance of solid oxide electrolysis cell electrodes under high-temperature coelectrolysis of steam and carbon dioxide" @default.
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- W2003709775 doi "https://doi.org/10.1016/j.jpowsour.2010.09.018" @default.
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