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DOI	10.1039/c8ee01140k
	A highly active, CO2-tolerant electrode for the oxygen reduction reaction
	Chen Y.; Yoo S.; Choi Y.; Kim J.H.; Ding Y.; Pei K.; Murphy R.; Zhang Y.; Zhao B.; Zhang W.; Chen H.; Chen Y.; Yuan W.; Yang C.; Liu M.
发表日期	2018
ISSN	17545692
起始页码	2458
结束页码	2466
卷号	11 期号:9
英文摘要	One challenge facing the development of high-performance cathodes for solid oxide fuel cells (SOFC) is the fast degradation rate of cathodes due to poisoning by contaminants commonly encountered in ambient air such as CO2. Here we report a double perovskite PrBa0.8Ca0.2Co2O5+δ (PBCC) cathode with excellent ORR activity and remarkable CO2 tolerance under realistic operation conditions. When tested in a symmetrical cell in air with ∼1 vol% CO2 at 750 °C, the PBCC electrode shows an area specific resistance of ∼0.024 Ω cm2, which increases to 0.028 Ω cm2 after 1000 h operation. The degradation rate is ∼1/24 of that of the state-of-the-art La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode under the same conditions. Impedance spectroscopy and in situ surface enhanced Raman spectroscopy analyses indicate that the surface of the PBCC electrode is much more active for oxygen exchange and more robust against CO2 than that of LSCF, as confirmed by density functional theory calculations. The fast ORR kinetics and excellent durability of PBCC in air with CO2 highlight the potential of PBCC as a highly promising material for devices involving oxygen electrochemistry such as solid oxide fuel cells, electrolysis cells, or gas separation membranes. © 2018 The Royal Society of Chemistry.
英文关键词	Barium compounds; Carbon dioxide; Cathodes; Degradation; Density functional theory; Electrolytic reduction; Gas permeable membranes; Iron compounds; Lanthanum compounds; Perovskite; Praseodymium compounds; Raman spectroscopy; Strontium compounds; Area-specific resistances; Double perovskites; Gas separation membrane; Impedance spectroscopy; La0.6sr0.4co0.2fe0.8o3; Operation conditions; Oxygen reduction reaction; Surface enhanced Raman spectroscopy; Solid oxide fuel cells (SOFC); carbon dioxide; electrode; operations technology; oxygen; performance assessment; reduction
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190149
作者单位	School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr NW, Atlanta, GA 30332-0245, United States; SABIC Technology Center, Riyadh, 11551, Saudi Arabia; National Key Laboratory for Precision Hot Processing of Metals, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin Heilongjiang, 150001, China; Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
推荐引用方式 GB/T 7714	Chen Y.,Yoo S.,Choi Y.,et al. A highly active, CO2-tolerant electrode for the oxygen reduction reaction[J],2018,11(9).
APA	Chen Y..,Yoo S..,Choi Y..,Kim J.H..,Ding Y..,...&Liu M..(2018).A highly active, CO2-tolerant electrode for the oxygen reduction reaction.Energy & Environmental Science,11(9).
MLA	Chen Y.,et al."A highly active, CO2-tolerant electrode for the oxygen reduction reaction".Energy & Environmental Science 11.9(2018).