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High-valence Mo doping for promoted water splitting of Ni layered double hydroxide microcrystals

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2023, 33(2), pp.78-82
  • DOI : 10.6111/JKCGCT.2023.33.2.078
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : February 7, 2023
  • Accepted : April 18, 2023
  • Published : April 30, 2023

KYOUNG-WON CHO 1 Seongwon Jeong 1 Je Hong Park 1 Si beom Yu 1 Byeong Jun Kim 1 Jeong-ho Ryu 1

1한국교통대학교

Accredited

ABSTRACT

The oxygen evolution reaction (OER) is the primary challenge in renewable energy storage technologies, specifically electrochemical water splitting for hydrogen generation. We report effects of Mo doping into Ni layered double hydroxide(Ni-LDH) microcrystal on electrocatalytic activities. In this study, Mo doped Ni-LDH were grown on three-dimensional porous nicekl foam (NF) by a facile solvothermal method. Homogeneous LDH structure on the NF was clearly observed. However, the surface microstructure of the nickel foam began to be irregular and collapsed when Mo precursor is doped. Electrocatalytic OER properties were analyzed by Linear sweep voltammetry (LSV) and Electrochemical impedance spectroscopy (EIS). The amount of Mo doping used in the electrocatalytic reaction was found to play a crucial role in improving catalyticactivity. The optimum Mo amount introduced into the Ni LDH was discussed with respect to their OER performance.

Citation status

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

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