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Solid-solution hexagonal Ni0.5Co0.5Se nanoflakes toward boosted oxygen evolution reaction.

Lei Zhu1, Yanxin Liao, Yubao Jia

  • 1Institute of Materials for Energy and Environment, Laboratory of New Fiber Materials and Modern Textile, Growing Basis for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China. kkwang@qdu.edu.cn.

Chemical Communications (Cambridge, England)
|September 30, 2020
PubMed
Summary

Researchers developed solid-solution hexagonal Ni0.5Co0.5Se nanoflakes to address the slow kinetics of the oxygen evolution reaction (OER) in water electrolysis. This advancement significantly lowers the energy required for efficient hydrogen production.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • The oxygen evolution reaction (OER) is crucial for water electrolysis but suffers from sluggish kinetics, hindering large-scale hydrogen production.
  • Developing efficient electrocatalysts is essential to overcome this bottleneck.

Purpose of the Study:

  • To design and synthesize novel solid-solution hexagonal Ni0.5Co0.5Se nanoflakes as an advanced electrocatalyst for OER.
  • To evaluate the catalytic performance of the synthesized material in water electrolysis.

Main Methods:

  • Facile hydrothermal synthesis of solid-solution hexagonal Ni0.5Co0.5Se nanoflakes.
  • Electrochemical characterization to determine OER activity, including overpotential and Tafel slope.

Main Results:

  • The synthesized Ni0.5Co0.5Se nanoflakes exhibited excellent OER activity.
  • Achieved a low overpotential of 216 mV at a current density of 10 mA cm-2.
  • Demonstrated a small Tafel slope of 37.08 mV dec-1, indicating efficient reaction kinetics.

Conclusions:

  • Solid-solution hexagonal Ni0.5Co0.5Se nanoflakes are highly effective electrocatalysts for the oxygen evolution reaction.
  • The developed material shows great promise for improving the efficiency of water electrolysis and enabling large-scale hydrogen production.