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Reducing Oxygen Evolution Reaction Overpotential in Cobalt-Based Electrocatalysts via Optimizing the “Microparticles-in-Spider Web” Electrode Configurations
Qi Guo1; Jiajun Mao2; Jianying Huang2; Zixi Wang1; Yanyan Zhang3; Jun Hu4; Jianing Dong1; Sanjayan Sathasivam5; Yan Zhao1; Guichuan Xing3; Hui Pan3; Yuekun Lai1,2; Yuxin Tang3
2020-02
Source PublicationSmall
ISSN1613-6810
Volume16Issue:8
Abstract

Sluggish kinetics of the multielectron transfer process is still a bottleneck for efficient oxygen evolution reaction (OER) activity, and the reduction of reaction overpotential is crucial to boost reaction kinetics. Herein, a correlation between the OER overpotential and the cobalt-based electrode composition in a “Microparticles-in-Spider Web” (MSW) superstructure electrode is revealed. The overpotential is dramatically decreased first and then slightly increased with the continuous increase ratio of Co/Co3O4 in the cobalt-based composite electrode, corresponding to the dynamic change of electrochemically active surface area and charge-transfer resistance with the electrode composition. As a proof-of-concept, the optimized electrode displays a low overpotential of 260 mV at 10.0 mA cm−2 in alkaline conditions with a long-time stability. This electrochemical performance is comparable and even superior to the most currently reported Co-based OER electrocatalysts. The remarkable electrocatalytic activity is attributed to the optimization of the electrochemically active sites and electron transfer in the MSW superstructure. Theoretical calculations identify that the metallic Co and Co3O4 surface catalytic sites play a vital role in improving electron transport and reaction Gibbs free energies for reducing overpotential, respectively. A general way of boosting OER kinetics via optimizing the electrode configurations to mitigate reaction overpotential is offered in this study.

KeywordCobalt-based Electrodes Electrode Configurations Low Overpotential Oxygen Evolution Reaction Structure Design
DOI10.1002/smll.201907029
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, multidisciplinaryChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000509349500001
PublisherWILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Scopus ID2-s2.0-85078671465
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Cited Times [WOS]:14   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorJianying Huang; Jun Hu; Yuekun Lai; Yuxin Tang
Affiliation1.National Engineering Laboratory for Modern Silk,College of Textile and Clothing Engineering,Soochow University,Suzhou,215123,China
2.National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC),College of Chemical Engineering,Fuzhou University,Fuzhou,350116,China
3.Institute of Applied Physics and Materials Engineering,University of Macau,999078,Macao
4.School of Chemical Engineering,Northwest University,Xi'an,710069,China
5.Department of Chemistry,University College London,London,WC1H 0AJ,United Kingdom
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Qi Guo,Jiajun Mao,Jianying Huang,et al. Reducing Oxygen Evolution Reaction Overpotential in Cobalt-Based Electrocatalysts via Optimizing the “Microparticles-in-Spider Web” Electrode Configurations[J]. Small,2020,16(8).
APA Qi Guo,Jiajun Mao,Jianying Huang,Zixi Wang,Yanyan Zhang,Jun Hu,Jianing Dong,Sanjayan Sathasivam,Yan Zhao,Guichuan Xing,Hui Pan,Yuekun Lai,&Yuxin Tang.(2020).Reducing Oxygen Evolution Reaction Overpotential in Cobalt-Based Electrocatalysts via Optimizing the “Microparticles-in-Spider Web” Electrode Configurations.Small,16(8).
MLA Qi Guo,et al."Reducing Oxygen Evolution Reaction Overpotential in Cobalt-Based Electrocatalysts via Optimizing the “Microparticles-in-Spider Web” Electrode Configurations".Small 16.8(2020).
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