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Updated: Aug 11, 2025
09:18
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
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Activated FeS2 @NiS2 Core-Shell Structure Boosting Cascade Reaction for Superior Electrocatalytic Oxygen Evolution
Lulu Zhang1,2, Ju Rong3, Yongqiang Yang1
1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 4, 2023
Summary
This study introduces a gradient Fe-doped NiOOH electrocatalyst for efficient cascade oxygen evolution reactions (OER). The novel FeS2@NiS2 core-shell structure enables progressive catalysis, enhancing OER performance.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Multi-step reactions require simultaneous and progressive catalysis for efficiency.
- Oxygen evolution reaction (OER) intermediates necessitate varying Fe/Ni ratios in FeₓNi₁₋ₓOOH.
Purpose of the Study:
- To demonstrate the superiority of cascade OER using a gradient Fe-doped NiOOH electrocatalyst.
- To develop an efficient electrocatalyst for cascade OER.
Main Methods:
- Theoretical analysis and experimental validation of cascade OER.
- Fabrication of a FeS₂@NiS₂ core-shell structure via controlled nucleation.
- Characterization of gradient Fe/Ni ratios in the FeₓNi₁₋ₓOOH shell.
Main Results:
- The FeS₂@NiS₂ catalyst achieved a low overpotential of 237 mV at 10 mA cm⁻² for cascade OER.
- Demonstrated fast reaction kinetics and excellent stability.
- Confirmed the formation of gradient Fe/Ni ratios due to Fe dopant diffusion.
Conclusions:
- Gradient Fe-doped NiOOH is an ideal electrocatalyst for efficient cascade OER.
- The FeS₂@NiS₂ core-shell structure facilitates progressive catalysis for enhanced OER performance.
- This approach offers a promising pathway for advanced electrocatalyst design.
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