气候变化领域集成服务门户(CCPortal): Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification

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DOI	10.1039/d0ee03283b
	Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification
	Kim J.H.; Yoo S.; Murphy R.; Chen Y.; Ding Y.; Pei K.; Zhao B.; Kim G.; Choi Y.; Liu M.
发表日期	2021
ISSN	17545692
起始页码	1506
结束页码	1516
卷号	14 期号:3
英文摘要	Highly efficient air electrodes are a key component of reversible fuel cells for energy storage and conversion; however, the development of efficient electrodes that are stable against water vapor remains a grand challenge. Here we report an air-electrode, composed of double perovskite material PrBa0.8Ca0.2Co2O5+δ (PBCC) backbone coated with nanoparticles (NPs) of BaCoO3-δ (BCO), that exhibits remarkable electrocatalytic activity for oxygen reduction reaction (ORR) while maintaining excellent tolerance to water vapor. When tested in a symmetrical cell exposed to wet air with 3 vol% H2O at 750 °C, the electrode shows an area specific resistance of ∼0.03 Ω cm2 in an extended period of time. The performance enhancement is attributed mainly to the electrocatalytic activity of the BCO NPs dispersed on the surface of the porous PBCC electrode. Moreover, in situ Raman spectroscopy is used to probe reaction intermediates (e.g., oxygen species) on electrode surfaces, as the electrochemical properties of the electrodes are characterized under the same conditions. The direct correlation between surface chemistry and electrochemical behavior of an electrode is vital to gaining insight into the mechanisms of the electrocatalytic processes in fuel cells and electrolysers. © 2021 The Royal Society of Chemistry.
英文关键词	Barium compounds; Conversion efficiency; Electrolytic reduction; Energy storage; Fuel storage; Oxygen; Oxygen reduction reaction; Perovskite; Praseodymium compounds; Reaction intermediates; Regenerative fuel cells; Surface chemistry; Water vapor; Area-specific resistances; Electrocatalytic activity; Electrocatalytic process; Electrochemical behaviors; Energy storage and conversions; In-situ Raman spectroscopy; Performance enhancements; Reversible fuel cells; Electrochemical electrodes; electrode; oxygen; 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/190756
作者单位	School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea; College of Photonics, National Chiao Tung University, Tainan, 71150, Taiwan
推荐引用方式 GB/T 7714	Kim J.H.,Yoo S.,Murphy R.,et al. Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification[J],2021,14(3).
APA	Kim J.H..,Yoo S..,Murphy R..,Chen Y..,Ding Y..,...&Liu M..(2021).Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification.Energy & Environmental Science,14(3).
MLA	Kim J.H.,et al."Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification".Energy & Environmental Science 14.3(2021).