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Annealing and electrochemically activated amorphous ribbons: Surface nanocrystallization and oxidation effects
Junying Jiang1, Yong Wu1, Hongguo Chen1
1Chongqing Key Laboratory of Photo-Electric Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China.
Journal of Colloid and Interface Science
|December 2, 2022
Summary
Combining annealing and cyclic voltammetry (CV) activation enhances amorphous alloy ribbons for oxygen evolution reactions (OER). This integrated strategy significantly boosts electrocatalyst performance, offering a promising approach for efficient energy conversion applications.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Amorphous alloy ribbons are crucial for environmental catalysis, often activated by annealing or cyclic voltammetry (CV).
- The combined application of annealing and CV for enhancing oxygen evolution reaction (OER) performance in amorphous alloys remains underexplored.
Purpose of the Study:
- To develop and evaluate an integrated
- annealing + CV-activation
- strategy for treating NiFeBSiP amorphous alloy ribbons.
Main Methods:
- An
- annealing + CV-activation
- integrated strategy was employed to treat NiFeBSiP amorphous alloy ribbons.
Main Results:
- The integrated strategy induced nanocrystallization and oxidation on the ribbon surface.
- This resulted in increased electron transfer, altered Ni/Fe/P oxidation states, and enhanced surface area.
- The treated ribbon demonstrated a low overpotential (269 mV at 10 mA cm⁻²) and Tafel slope (40.5 mV dec⁻¹), significantly improving OER performance.
Conclusions:
- The
- annealing + CV-activation
- strategy effectively enhances the OER performance of NiFeBSiP amorphous alloy ribbons.
- This integrated approach shows significant promise for designing high-efficiency amorphous alloy electrocatalysts.
