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Hollow Carbon@NiCo2O4 Core-Shell Microspheres for Efficient Electrocatalytic Oxygen Evolution
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2019 (English)In: ENERGY TECHNOLOGY, ISSN 2194-4288, Vol. 7, no 4, article id 1800919Article in journal (Refereed) Published
Abstract [en]

Earth-abundant transition metal oxides are considered one of the most promising oxygen evolution reaction (OER) catalysts. However, their intrinsically low electrical conductivity inhibits the fast kinetics for OER. To overcome this drawback, hollow carbon@NiCo2O4 core-shell microspheres (C@NiCo2O4 HSs) are synthesized with enhanced electrocatalytic activity and stability toward OER. The prepared C@NiCo2O4/Ni foam delivers a current density of 10 mA cm(-2) at a small overpotential of 268 mV and exhibits a low Tafel slope of 54 mV dec(-1). The enhanced OER performance is attributed to the enlarged specific surface area induced by the combination effect between the 1D nanosheet structure and the 3D hollow microsphere structure, and the improved electrical conductivity is ascribed to the carbon core support.

Place, publisher, year, edition, pages
2019. Vol. 7, no 4, article id 1800919
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Inorganic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-252992DOI: 10.1002/ente.201800919ISI: 000466486200004OAI: oai:DiVA.org:kth-252992DiVA, id: diva2:1339341
Note

QC 20190729

Available from: 2019-07-29 Created: 2019-07-29 Last updated: 2019-07-29Bibliographically approved

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Sun, Licheng

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