气候变化领域集成服务门户(CCPortal): Promoted oxygen reduction kinetics on nitrogen-doped hierarchically porous carbon by engineering proton-feeding centers

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DOI	10.1039/d0ee01613f
	Promoted oxygen reduction kinetics on nitrogen-doped hierarchically porous carbon by engineering proton-feeding centers
	Chen G.; Wang T.; Liu P.; Liao Z.; Zhong H.; Wang G.; Zhang P.; Yu M.; Zschech E.; Chen M.; Zhang J.; Feng X.
发表日期	2020
ISSN	1754-5692
起始页码	2849
结束页码	2855
卷号	13 期号:9
英文摘要	Electrocatalytic oxygen reduction reaction (ORR) is the vital process for next-generation electrochemical energy storage and conversion technologies, e.g., metal-air batteries and fuel cells. During the ORR, the O2∗ and O∗ intermediates principally combine with protons to form OOH∗ and OH∗ species, respectively, which are the proton-coupled electron transfer processes. Unfortunately, under alkaline conditions, the protons are essentially generated from the sluggish water dissociation process, which unavoidably limits the ORR kinetics. Herein, we design and synthesize a nitrogen-doped hierarchically porous carbon with homogeneously distributed ultrafine α-MoC nanoparticles (α-MoC/NHPC) as a model electrocatalyst. Theoretical investigations unveil that α-MoC on NHPC could efficiently reduce the energy barrier of the water dissociation process to generate protons, eventually promoting the proton-coupled ORR kinetics. In a 0.1 M KOH aqueous solution, α-MoC/NHPC exhibits excellent ORR performance with a high half-wave potential of 0.88 V (vs. reversible hydrogen electrode), which outperforms those for NHPC and commercial Pt/C. Moreover, as the air electrode in a zinc-air battery, α-MoC/NHPC presents a large peak power density of 200.3 mW cm-2 and long-term stability. Thereby, our approach to engineering proton-feeding centers paves a new avenue towards the understanding of ORR kinetics and the development of high-performance ORR electrocatalysts. This journal is © The Royal Society of Chemistry.
语种	英语
scopus关键词	Carbon; Dissociation; Doping (additives); Electrocatalysts; Electrodes; Electrolytic reduction; Electron transport properties; Energy storage; Fuel cells; Fuel storage; Kinetics; Nitrogen; Oxygen; Platinum compounds; Porous materials; Potassium hydroxide; Synthesis (chemical); Zinc air batteries; Electrocatalytic oxygen reduction; Electrochemical energy storage; Hierarchically porous carbons; Oxygen reduction kinetics; Peak power densities; Proton coupled electron transfers; Reversible hydrogen electrodes; Theoretical investigations; Oxygen reduction reaction; carbon dioxide; concentration (composition); oxygen; porous medium; reaction kinetics; reduction
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/162403
作者单位	Center for Advancing Electronics Dresden (Cfaed), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, 01062, Germany; SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA 94305, United States; School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200230, China; Fraunhofer Institute for Ceramic, Technologies and Systems (IKTS), Dresden, 01109, Germany; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, United States; Department of Applied Chemistry, School of Applied and Natural Sciences, Northwestern Polytechnical University, Xi'an, 710129, China
推荐引用方式 GB/T 7714	Chen G.,Wang T.,Liu P.,et al. Promoted oxygen reduction kinetics on nitrogen-doped hierarchically porous carbon by engineering proton-feeding centers[J],2020,13(9).
APA	Chen G..,Wang T..,Liu P..,Liao Z..,Zhong H..,...&Feng X..(2020).Promoted oxygen reduction kinetics on nitrogen-doped hierarchically porous carbon by engineering proton-feeding centers.Energy and Environmental Science,13(9).
MLA	Chen G.,et al."Promoted oxygen reduction kinetics on nitrogen-doped hierarchically porous carbon by engineering proton-feeding centers".Energy and Environmental Science 13.9(2020).