气候变化领域集成服务门户(CCPortal): Exploring the artificially induced nonstoichiometric effect of Li2RuO3as a reactive promoter on electrocatalytic behavior

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DOI	10.1039/d0ee00859a
	Exploring the artificially induced nonstoichiometric effect of Li2RuO3as a reactive promoter on electrocatalytic behavior
	Jang H.; Jin W.; Nam G.; Yoo Y.; Jeon J.S.; Park J.; Kim M.G.; Cho J.
发表日期	2020
ISSN	17545692
起始页码	2167
结束页码	2177
卷号	13 期号:7
英文摘要	Understanding the fundamental properties, particularly identifying the independent effect of factors that govern catalytic activities, is crucial to design strategies for synthesizing efficient electrocatalysts. Here, we have explored the independent effect of mixed valence and oxygen defects on the catalytic origin by artificially engineering the stoichiometry of Li2RuO3. On the basis of the operando X-ray absorption spectroscopy (XAS) results, we demonstrated that the mixed valence enhanced the redox reversibility of ruthenium ions and the oxygen defects provided more electrocatalytic active sites. Consequently, non-stoichiometric Li2-xRuO3-y exhibited superior performance for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and Zn-air batteries in alkaline media compared to state-of-the-art Pt/C and RuO2. Moreover, the applicability of the nonstoichiometric effect in various electrocatalytic reactions was systematically verified. Therefore, artificially induced non-stoichiometry is a feasible strategy to design efficient multifunctional electrocatalysts and this strategy can be applied to general metal oxide electrocatalysts for various electrocatalytic reactions. © 2020 The Royal Society of Chemistry.
英文关键词	Catalyst activity; Defects; Electrocatalysis; Electrocatalysts; Electrolysis; Electrolytic reduction; Lithium compounds; Metals; Oxygen; Oxygen evolution reaction; Oxygen reduction reaction; Stoichiometry; X ray absorption spectroscopy; Zinc air batteries; Design strategies; Effect of factors; Electrocatalytic behavior; Electrocatalytic reactions; Fundamental properties; Non stoichiometry; Non-stoichiometric; Oxygen evolution reaction (oer); Ruthenium compounds; concentration (composition); electrochemistry; induced response; performance assessment; reactive oxygen species; stoichiometry
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/189619
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; Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang, 790-784, South Korea; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, United States; Department of Materials, University of Oxford, Parks Road, Oxford, OX13PH, United Kingdom
推荐引用方式 GB/T 7714	Jang H.,Jin W.,Nam G.,et al. Exploring the artificially induced nonstoichiometric effect of Li2RuO3as a reactive promoter on electrocatalytic behavior[J],2020,13(7).
APA	Jang H..,Jin W..,Nam G..,Yoo Y..,Jeon J.S..,...&Cho J..(2020).Exploring the artificially induced nonstoichiometric effect of Li2RuO3as a reactive promoter on electrocatalytic behavior.Energy & Environmental Science,13(7).
MLA	Jang H.,et al."Exploring the artificially induced nonstoichiometric effect of Li2RuO3as a reactive promoter on electrocatalytic behavior".Energy & Environmental Science 13.7(2020).