In-situ confined formation of NiFe layered double hydroxide quantum dots in expanded graphite for active electrocatalytic oxygen evolution

In-situ confined formation of NiFe layered double hydroxide quantum dots in expanded graphite for... Development of noble-metal-free catalysts towards highly efficient electrochemical oxygen evolution reaction (OER) is critical but challenging in the renewable energy area. Herein, we firstly embed NiFe LDHs quantum dots (QDs) into expanded graphite (NiFe LDHs/EG) via in-situ confined formation process. The interlayer spacing of EG layers acts as nanoreactors for spatially confined formation of NiFe LDHs QDs. The QDs supply huge catalytic sites for OER. The in-situ decoration endows the strong affinity between QDs with EG, thus inducing fast charge transfer. Based on the aforementioned benefits, the designed catalyst exhibits outstanding OER properties, in terms of small overpotential (220 mV required to generate 10 mA cm−2), low Tafel slope, and good durable stability, making it a promising candidate for inexpensive OER catalyst. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Chemistry Elsevier

In-situ confined formation of NiFe layered double hydroxide quantum dots in expanded graphite for active electrocatalytic oxygen evolution

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Inc.
ISSN
0022-4596
eISSN
1095-726X
D.O.I.
10.1016/j.jssc.2018.03.017
Publisher site
See Article on Publisher Site

Abstract

Development of noble-metal-free catalysts towards highly efficient electrochemical oxygen evolution reaction (OER) is critical but challenging in the renewable energy area. Herein, we firstly embed NiFe LDHs quantum dots (QDs) into expanded graphite (NiFe LDHs/EG) via in-situ confined formation process. The interlayer spacing of EG layers acts as nanoreactors for spatially confined formation of NiFe LDHs QDs. The QDs supply huge catalytic sites for OER. The in-situ decoration endows the strong affinity between QDs with EG, thus inducing fast charge transfer. Based on the aforementioned benefits, the designed catalyst exhibits outstanding OER properties, in terms of small overpotential (220 mV required to generate 10 mA cm−2), low Tafel slope, and good durable stability, making it a promising candidate for inexpensive OER catalyst.

Journal

Journal of Solid State ChemistryElsevier

Published: Jun 1, 2018

References

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