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In situ growth of NiSe2 nanocrystalline array on graphene for efficient hydrogen evolution reaction

In situ growth of NiSe2 nanocrystalline array on graphene for efficient hydrogen evolution reaction Nickel selenide electrocatalysts for hydrogen evolution reaction (HER) with a high efficiency and a low-cost have a significant potential in the development of water splitting. However, the inferiority of the high overpotential and poor stability restricts their practical applications. Herein, a composite nanostructure consists of ultrasmall NiSe2 nanocrystals embedded on graphene by microwave reaction is reported. The prepared NiSe2/reduced graphite oxide (rGO) electrocatalyst exhibited a high HER activity with an overpotential of 158 mV at a current density of 10 mA/cm2 and a corresponding moderate Tafel slope of 56 mV/dec in alkaline electrolyte. In addition, a high retention of electrochemical properties (approximately 100%) was demonstrated with an unchangeable microstructure after 100 h of continuous operation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Frontiers in Energy Springer Journals

In situ growth of NiSe2 nanocrystalline array on graphene for efficient hydrogen evolution reaction

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Publisher
Springer Journals
Copyright
Copyright © Higher Education Press 2022
ISSN
2095-1701
eISSN
2095-1698
DOI
10.1007/s11708-022-0827-7
Publisher site
See Article on Publisher Site

Abstract

Nickel selenide electrocatalysts for hydrogen evolution reaction (HER) with a high efficiency and a low-cost have a significant potential in the development of water splitting. However, the inferiority of the high overpotential and poor stability restricts their practical applications. Herein, a composite nanostructure consists of ultrasmall NiSe2 nanocrystals embedded on graphene by microwave reaction is reported. The prepared NiSe2/reduced graphite oxide (rGO) electrocatalyst exhibited a high HER activity with an overpotential of 158 mV at a current density of 10 mA/cm2 and a corresponding moderate Tafel slope of 56 mV/dec in alkaline electrolyte. In addition, a high retention of electrochemical properties (approximately 100%) was demonstrated with an unchangeable microstructure after 100 h of continuous operation.

Journal

Frontiers in EnergySpringer Journals

Published: Aug 1, 2022

Keywords: nickel selenide; carbon materials; nanoparticles; hydrogen evolution reaction (HER); microwave reaction

References