Related Experiment Video
Updated: Jun 10, 2025
09:35
Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
Published on: July 28, 2020
4.9K
High-Entropy Selenides with Tunable Lattice Distortion as Efficient Electrocatalysts for Oxygen Evolution Reaction
Laiquan Li1, Changfa Li2, Jiale Du2
1Institute of Energy Materials Science, University of Shanghai, for Science and Technology, Shanghai, 200093, China.
Chemsuschem
|October 14, 2024
Summary
Stable and active high-entropy selenides (HESes) were developed for the oxygen evolution reaction (OER). These catalysts show excellent performance and stability, crucial for efficient hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- The oxygen evolution reaction (OER) is critical for sustainable hydrogen production but is hindered by sluggish kinetics.
- Developing stable and active electrocatalysts is essential for improving OER efficiency.
Purpose of the Study:
- To design and synthesize high-entropy selenides (HESes) with tunable lattice strain for enhanced electrocatalytic oxygen evolution.
- To investigate the role of lattice distortion in boosting OER activity in HESes.
Main Methods:
- Synthesis of quinary (NiCoMnMoFe)Seₓ high-entropy selenides.
- Electrochemical measurements including overpotential and long-term stability tests.
- Experimental measurements combined with theoretical calculations (e.g., DFT) to analyze catalyst properties.
Main Results:
- The quinary (NiCoMnMoFe)Seₓ catalyst achieved an overpotential of 291 mV to reach 10 mA cm⁻², demonstrating high activity.
- The catalyst exhibited superior stability, with negligible current decay over 100 hours of continuous operation.
- Lattice distortion and local microstrain near active sites were identified as key factors enhancing OER activity.
Conclusions:
- High-entropy selenides with tunable lattice strain are promising electrocatalysts for the oxygen evolution reaction.
- Lattice distortion significantly boosts the catalytic performance of HESes for OER.
- These findings pave the way for developing efficient electrocatalysts for sustainable energy applications.
