期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 11, 页码 6395-6400出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00643e
关键词
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资金
- National Key Research & Development Project-International Cooperation Program [2016YFE0126900]
- National Natural Science Foundation of China [51672095]
Symmetrical solid oxide electrolysis cells (S-SOECs) have received increasing attention due to their low fabrication cost and simple preparation procedure. However, the investigation of S-SOECs for CO2 electrolysis has been hindered due to the lack of high performance stable electrodes with good CO2 reduction reaction (CO2-RR) and oxygen evolution reaction (OER) catalytic activity. Herein, a novel perovskite La0.6Ca0.4Fe0.8Ni0.2O3-delta (LCaFN) is investigated as an electrode of S-SOECs for CO2 electrolysis. The S-SOEC has a low polarization resistance of only 0.04 Omega cm(2) and achieves a maximum electrolysis current density of 1.41 A cm(-2) at 800 degrees C with pure CO2 at 2.0 V. LCaFN electrodes show good stability and can be recovered by simple air treatment after a period of operation to avoid the formation of carbonates with alkaline earth elements in the perovskite as La0.6Sr0.4Fe0.8Ni0.2O3-delta (LSrFN). The mechanism of self-recovery of the LCaFN electrode by air treatment is discussed and analyzed.
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