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Updated: Sep 24, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Reprogramming thermodynamic-limiting oxidation cycle in NiFe-based oxygen evolution electrocatalyst through Mo doping

Yunqing Liu1, Xuefeng Wang1, Yuanna Zhu2

  • 1Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China.

Journal of Colloid and Interface Science
|May 8, 2022
PubMed
Summary

High-valence molybdenum doping in NiFeMoOₓ nanosheets enhances the oxygen evolution reaction (OER) for renewable energy. This breakthrough reduces overpotential and improves stability, paving the way for cost-effective electrocatalysts.

Keywords:
ElectrocatalystMultimetallic oxidesNiFeMoO(x)Oxygen evolution reactionWater oxidation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Developing cost-effective, nonprecious electrocatalysts for the oxygen evolution reaction (OER) is crucial for renewable fuel production.
  • Existing electrocatalysts often require high overpotentials and suffer from poor stability, limiting their industrial applicability.

Purpose of the Study:

  • To engineer robust, high-performance nonprecious electrocatalysts for the anodic oxygen evolution reaction (OER).
  • To investigate the effect of high-valence molybdenum doping on NiFe oxyhydroxide for improved OER activity and stability.

Main Methods:

  • NiFeMoOₓ nanosheets were synthesized using an in-situ solvothermal etching-depositing process on a NiFe alloy framework.
  • Electrocatalytic activity and stability were evaluated in alkaline media, measuring overpotentials, current densities, and Tafel slopes.

Main Results:

  • The NiFeMoOₓ nanosheets demonstrated outstanding alkaline OER activity, achieving current densities of 10, 100, and 300 mA cm⁻² at overpotentials of 235, 282, and 327 mV, respectively.
  • The electrocatalyst exhibited excellent long-term stability, maintaining performance at 20 mA cm⁻² for 72 hours, with a low Tafel slope of 28.1 mV dec⁻¹ indicating favorable kinetics.
  • High-valence Mo doping induced lower oxidation states in Ni and Fe, facilitating surface reconstruction and reducing OER overpotential.

Conclusions:

  • NiFeMoOₓ nanosheets represent a highly active and stable nonprecious electrocatalyst for the oxygen evolution reaction.
  • The synergistic effects of multimetallic electronic interactions and unique nanosheet morphology contribute to the superior catalytic performance.
  • This work provides a promising strategy for developing advanced electrocatalysts for industrial renewable energy applications.