Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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High-valence Mo doping for promoted water splitting of Ni layered double hydroxide microcrystals

  • Kyoungwon Cho (Center for Research Facilities, Korea National University of Transportation) ;
  • Seungwon Jeong (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Je Hong Park (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Si Beom Yu (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Byeong Jun Kim (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Jeong Ho Ryu (Department of Materials Science and Engineering, Korea National University of Transportation)
  • Received : 2023.02.07
  • Accepted : 2023.04.18
  • Published : 2023.04.30
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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 catalytic activity. The optimum Mo amount introduced into the Ni LDH was discussed with respect to their OER performance.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2022R1A2C2010162).

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