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Morphology-Engineered NiMo Alloy on Nickel Foam for Enhanced Hydrogen Evolution Reaction Performance
Yanhong Ding1, Yong Cao1, Zhichao Gao1
1School of Materials Science and Engineering, Hunan University of Technology, Zhuzhou 412007, China.
Molecules (Basel, Switzerland)
|June 13, 2025
Summary
A novel nanoflower-like nickel-molybdenum alloy on nickel foam demonstrates exceptional performance for the hydrogen evolution reaction (HER). This advanced catalyst offers high efficiency and durability for future hydrogen energy technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing efficient electrocatalysts is crucial for hydrogen production.
- Nickel-molybdenum alloys show promise for the hydrogen evolution reaction (HER).
Purpose of the Study:
- To synthesize and characterize a nanoflower-like nickel-molybdenum alloy catalyst on nickel foam (NF).
- To evaluate the catalyst's performance for the hydrogen evolution reaction (HER).
Main Methods:
- Hydrothermal synthesis of NiMoO4 nanorod arrays on nickel foam.
- Gas-phase re-reduction at 600 °C.
- Electrochemical characterization including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).
- Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS) for structural and compositional analysis.
Main Results:
- The synthesized NiMo/NF catalyst exhibits a uniform porous structure and high specific surface area.
- Electrochemical measurements show excellent HER performance with a low overpotential (127 mV at 100 mA cm-2) and Tafel slope (124 mV dec-1).
- The catalyst possesses the largest electrochemically active surface area and lowest charge transfer resistance, maintaining stability for 45 hours.
Conclusions:
- The nanoflower-like NiMo/NF catalyst is highly efficient and durable for HER.
- This material holds significant potential for advancing hydrogen energy technology.
