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Enhancing the Oxygen Evolution Performance by Introducing NiO-Supported Mesoporous Titanium Dioxide.

Abdulrahman Y Alzahrani1, Mohammed A Bahattab1, Mohammed Mushab2

  • 1Refining and Petrochemical Technologies Institute (RPTI), King Abdulaziz City for Science and Technology (KACST), P.O Box 6086, Riyadh, 11442, Saudi Arabia.

Chemistryopen
|October 10, 2025
PubMed
Summary

This study developed nickel oxide-doped mesoporous titanium dioxide (x-NTO) for efficient oxygen evolution reactions (OER). The 3.0 wt% nickel oxide-doped material (3.0-NTO) demonstrated superior OER activity and durability for clean energy applications.

Keywords:
alkaline solutionmesoporousnickel oxideoxygen evolutiontitanium dioxide

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Sustainable Energy

Background:

  • Water electrolysis is crucial for sustainable hydrogen and oxygen production.
  • Developing efficient electrocatalysts is key to advancing clean energy technologies.

Purpose of the Study:

  • To synthesize nickel oxide-doped mesoporous titanium dioxide (x-NTO) for enhanced oxygen evolution reaction (OER) performance.
  • To investigate the impact of nickel oxide doping concentration on OER activity and stability.

Main Methods:

  • Utilized an acetic acid-assisted soft-template method with polyvinylpyrrolidone to synthesize mesoporous x-NTO.
  • Evaluated OER activity and durability of synthesized catalysts in 1 M KOH solution.

Main Results:

  • All synthesized x-NTO materials showed enhanced OER activity compared to pure TiO2.
  • The 3.0 wt% nickel oxide-doped material (3.0-NTO) exhibited the highest OER activity, with a 0.270 V decrease in onset potential.
  • 3.0-NTO demonstrated an overpotential of 340 mV at 10 mA cm⁻² and a mass activity of 66.50 mA mg⁻¹.
  • The 3.0-NTO electrode maintained stability during 12 hours of electrolysis.

Conclusions:

  • Nickel oxide doping significantly improves the OER performance of mesoporous TiO2.
  • The 3.0-NTO catalyst shows great potential as a durable electrocatalyst for energy conversion technologies.