气候变化领域集成服务门户(CCPortal): A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells

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DOI	10.1039/c6ee03656b
	A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells
	Chen Y.; Chen Y.; Ding D.; Ding Y.; Choi Y.; Zhang L.; Yoo S.; Chen D.; DeGlee B.; Xu H.; Lu Q.; Zhao B.; Vardar G.; Wang J.; Bluhm H.; Crumlin E.J.; Yang C.; Liu J.; Yildiz B.; Liu M.
发表日期	2017
ISSN	17545692
起始页码	964
结束页码	971
卷号	10 期号:4
英文摘要	The sluggish oxygen reduction reaction (ORR) greatly reduces the energy efficiency of solid oxide fuel cells (SOFCs). Here we report our findings in dramatically enhancing the ORR kinetics and durability of the state-of-the-art La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode using a hybrid catalyst coating composed of a conformal PrNi0.5Mn0.5O3 (PNM) thin film with exsoluted PrOx nanoparticles. At 750°C, the hybrid catalyst-coated LSCF cathode shows a polarization resistance of ∼0.022 Ω cm2, about 1/6 of that for a bare LSCF cathode (∼0.134 Ω cm2). Further, anode-supported cells with the hybrid catalyst-coated LSCF cathode demonstrate remarkable peak power densities (∼1.21 W cm-2) while maintaining excellent durability (0.7 V for ∼500 h). Near Ambient X-ray Photoelectron Spectroscopy (XPS) and Near Edge X-Ray Absorption Fine Structure (NEXAFS) analyses, together with density functional theory (DFT) calculations, indicate that the oxygen-vacancy-rich surfaces of the PrOx nanoparticles greatly accelerate the rate of electron transfer in the ORR whereas the thin PNM film facilitates rapid oxide-ion transport while drastically enhancing the surface stability of the LSCF electrode. © The Royal Society of Chemistry 2017.
英文关键词	Catalysts; Cathodes; Cobalt; Density functional theory; Durability; Electrodes; Electrolytic reduction; Energy efficiency; Fuel cells; Manganese; Nanoparticles; Oxygen; Oxygen vacancies; X ray absorption; X ray photoelectron spectroscopy; Anode supported cell; Electron transfer; Near edge x-ray absorption fine structure analysis; Oxygen reduction reaction; Peak power densities; Polarization resistances; Solid oxide fuel cells (SOFCs); Surface stability; Solid oxide fuel cells (SOFC); catalyst; chemical process; electrode; energy efficiency; fuel cell; inorganic compound; nanoparticle; oxide; oxygen; polarization; reaction kinetics; 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/190490
作者单位	Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, United States; Laboratory for Electrochemical Interfaces, Department of Nuclear Science and Engineering, Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; 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; SABIC Technology Center, Riyadh, 11551, Saudi Arabia; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Chen Y.,Chen Y.,Ding D.,et al. A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells[J],2017,10(4).
APA	Chen Y..,Chen Y..,Ding D..,Ding Y..,Choi Y..,...&Liu M..(2017).A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells.Energy & Environmental Science,10(4).
MLA	Chen Y.,et al."A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells".Energy & Environmental Science 10.4(2017).