气候变化领域集成服务门户(CCPortal): Boosting the oxygen evolution reaction using defect-rich ultra-thin ruthenium oxide nanosheets in acidic media

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DOI	10.1039/d0ee01960g
	Boosting the oxygen evolution reaction using defect-rich ultra-thin ruthenium oxide nanosheets in acidic media
	Zhao Z.L.; Wang Q.; Huang X.; Feng Q.; Gu S.; Zhang Z.; Xu H.; Zeng L.; Gu M.; Li H.
发表日期	2020
ISSN	1754-5692
起始页码	5143
结束页码	5151
卷号	13 期号:12
英文摘要	Developing low cost and highly active catalysts for the oxygen evolution reaction (OER) in an acidic medium is urgently indispensable for proton exchange membrane water electrolyzers (PEMWEs). Herein, we have prepared ultra-thin RuO2 nanosheets (RuO2 NSs) using a simple molten salt method. The as-prepared RuO2 NSs with a thickness of 1-2 nm possess abundant defects. Toward the OER, the RuO2 NSs achieve an extremely low overpotential of 199 mV at a current density of 10 mA cmgeo-2 with a loading of 125 μg cmgeo-2. Furthermore, the RuO2 NSs exhibit specific and mass activities of up to 0.89 mA cmoxide-2 and 0.52 A mgRu-1 at 1.46 V vs. RHE, which are 14.9 and 80.6 times enhanced in specific and mass activity as compared to the commercial RuO2 nanoparticles, respectively. In a homemade PEMWE, with RuO2 NSs as the OER catalyst, the electrolyzer achieves a current density of 0.93 A cm-2 at a cell voltage of 1.65 V without iR drop correction, which is 3 times larger than that of the commercial RuO2 catalyst (0.31 A cm-2). Density functional theory calculations indicate that the Ru vacancy on the RuO2 NS surfaces significantly weakens the binding energy of O∗ with respect to that of OOH∗, which decreases the energy cost in the transformation from O∗ to OOH∗, and thus dramatically enhances the OER performance. The unique defect-rich structure and outstanding performance demonstrate that the RuO2 NSs possess great potential for developing high-performance PEMWEs. This journal is © The Royal Society of Chemistry.
语种	英语
scopus关键词	Binding energy; Catalysts; Defects; Density functional theory; Electrolytic cells; Nanosheets; Oxygen; Oxygen evolution reaction; Acidic mediums; Active catalyst; Cell voltages; Molten salt method; Oxygen evolution reaction (oer); Proton exchange membranes; Rich structure; Ruthenium oxide; Ruthenium compounds; acidity; chemical reaction; inorganic compound; nanomaterial; oxygen
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162948
作者单位	Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055; Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, Shenzhen, Guangdong 518055; Shenzhen Engineering Laboratory for Automotive Fuel Cell Stacks, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
推荐引用方式 GB/T 7714	Zhao Z.L.,Wang Q.,Huang X.,et al. Boosting the oxygen evolution reaction using defect-rich ultra-thin ruthenium oxide nanosheets in acidic media[J],2020,13(12).
APA	Zhao Z.L..,Wang Q..,Huang X..,Feng Q..,Gu S..,...&Li H..(2020).Boosting the oxygen evolution reaction using defect-rich ultra-thin ruthenium oxide nanosheets in acidic media.Energy and Environmental Science,13(12).
MLA	Zhao Z.L.,et al."Boosting the oxygen evolution reaction using defect-rich ultra-thin ruthenium oxide nanosheets in acidic media".Energy and Environmental Science 13.12(2020).