Heat-treatment effects on oxygen evolution reaction of nickel-cobalt layered double hydroxide

Jung-Il Lee (이정일); Daehyeon Ko (고대현); Sungwook Mhin (민성욱); Ryu, Jeong-ho (류정호)

doi:10.6111/JKCGCT.2021.31.3.143

Heat-treatment effects on oxygen evolution reaction of nickel-cobalt layered double hydroxide

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2021, 31(3), pp.143~148
DOI : 10.6111/JKCGCT.2021.31.3.143
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : June 14, 2021
Accepted : June 22, 2021
Published : June 30, 2021

Jung-Il Lee ¹, Daehyeon Ko ², Sungwook Mhin ², Ryu, Jeong-ho ¹

¹한국교통대학교
²경기대학교

Accredited

ABSTRACT

Alkaline oxygen evolution reaction (OER) electrocatalysts have been widely studied for improving the efficiencyand green hydrogen production through electrochemical water splitting. Transition metal-based electrocatalysts have emergedas promising materials that can significantly reduce the hydrogen production costs. Among the available electrocatalysts,transition metal-based layered double hydroxides (LDHs) have demonstrated outstanding OER performance owing to theabundant active sites and favorable adsorption-desorption energies for OER intermediates. Currently, cobalt doped nickel LDHs(NiCo LDHs) are regarded as the benchmark electrocatalyst for alkaline OER, primarily owing to the physicochemicalsynergetic effects between Ni and Co. We report effects of heat-treatment of the as-grown NiCo LDH on electrocatalyticactivities in a temperature range from 250 to 400°C. Electrocatalytic OER properties were analysed by linear sweep voltammetry(LSV) and electrochemical impedance spectroscopy (EIS). The heat-treatment temperature was found to play a crucial rolein catalytic activity. The optimum heat-treatment temperature was discussed with respect to their OER performance.

KEYWORDS

Elecrocatalysis, Water splitting, OER, NiCo LDH, Heat-treatment

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This paper was written with support from the National Research Foundation of Korea.

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Heat-treatment effects on oxygen evolution reaction of nickel-cobalt layered double hydroxide

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* References for papers published after 2023 are currently being built.

Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Heat-treatment effects on oxygen evolution reaction of nickel-cobalt layered double hydroxide

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