气候变化领域集成服务门户(CCPortal): Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries

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DOI	10.1039/c6ee03046g
	Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries
	Park J.; Risch M.; Nam G.; Park M.; Shin T.J.; Park S.; Kim M.G.; Shao-Horn Y.; Cho J.
发表日期	2017
ISSN	17545692
起始页码	129
结束页码	136
卷号	10 期号:1
英文摘要	Oxygen reduction reaction (ORR) or oxygen evolution reaction (OER) electrocatalysts including carbon-, non-precious metal-, metal alloy-, metal oxide-, and carbide/nitride-based materials are of great importance for energy conversion and storage technologies. Among them, metal oxides (e.g., perovskite and pyrochlore) are known to be promising candidates as electrocatalysts. Nevertheless, the intrinsic catalytic activities of pyrochlore oxides are still poorly understood because of the formation of undesirable phases derived from the synthesis processes. Herein, we present highly pure single crystalline pyrochlore nanoparticles with metallic conduction (Pb2Ru2O6.5) as an efficient bi-functional oxygen electrocatalyst. Notably, it has been experimentally shown that the covalency of Ru-O bonds affects the ORR and OER activities by comparing the X-ray absorption near edge structure (XANES) spectra of the metallic Pb2Ru2O6.5 and insulating Sm2Ru2O7 for the first time. Moreover, we followed the interatomic distance changes of Ru-O bonds using in situ X-ray absorption spectroscopy (XAS) to investigate the structural stabilities of the pyrochlore catalysts during electrocatalysis. The highly efficient metallic Pb2Ru2O6.5 exhibited outstanding bi-functional catalytic activities and stabilities for both ORR and OER in aqueous Zn-air batteries. © The Royal Society of Chemistry 2017.
英文关键词	Carbides; Catalyst activity; Crystalline materials; Electric batteries; Electrocatalysis; Electrocatalysts; Electrolysis; Electrolytic reduction; Energy conversion; Lead compounds; Metals; Nanoparticles; Oxygen; Perovskite; Precious metal alloys; Samarium compounds; Stability; X ray absorption near edge structure spectroscopy; Energy conversion and storages; In-situ X-ray absorption spectroscopy; Inter-atomic distances; Metallic conduction; Oxygen evolution reaction; Oxygen reduction reaction; Structural stabilities; X-ray absorption near-edge structure; Ruthenium compounds; catalysis; catalyst; crystallinity; electrochemistry; nanoparticle; oxygen; perovskite; power generation; pyrochlore; reduction; zinc
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/190592
作者单位	School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, South Korea; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Insitute of Materials Physics, University of Göttingen, Göttingen, 37077, Germany; UNIST Central Research Facilities, School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, South Korea; Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang, 790-784, South Korea; Department of Materials Science and Engineering, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Park J.,Risch M.,Nam G.,et al. Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries[J],2017,10(1).
APA	Park J..,Risch M..,Nam G..,Park M..,Shin T.J..,...&Cho J..(2017).Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries.Energy & Environmental Science,10(1).
MLA	Park J.,et al."Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries".Energy & Environmental Science 10.1(2017).