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Charge Redistribution in Co-Doped Nickel Sulfide to Accelerate Its Alcohol Electrooxidation
Yufeng Zhang1, Jinjie Fang2, Qianhui Wu1
1Jiangsu Key Laboratory of Zero-Carbon Energy Development and System Integration, Nanjing Xiaozhuang University, Nanjing 211171, China.
ACS Applied Materials & Interfaces
|April 15, 2025
Summary
Nickel sulfide nanowires doped with cobalt show enhanced performance for electrochemical alcohol oxidation reactions. This process coproduces green hydrogen and valuable chemicals efficiently, offering a promising sustainable energy solution.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Electrochemical alcohol oxidation reaction (AOR) coupled with hydrogen evolution reaction (HER) offers a low-energy pathway for producing green hydrogen and valuable chemicals.
- Developing efficient catalysts is crucial for optimizing these coupled reactions.
Purpose of the Study:
- To synthesize and investigate M-doped (M = Co, Fe, Cu) nickel sulfide nanowires (NWs) for AOR.
- To evaluate the catalytic performance of Ni2Co1S2 NWs for various alcohol oxidations.
Main Methods:
- Synthesis of M-doped nickel sulfide nanowires.
- Electrochemical testing of benzyl alcohol, glycerol, and ethylene glycol oxidation.
- Analysis of catalytic activity and performance.
Main Results:
- Ni2Co1S2 NWs demonstrated high benzyl alcohol oxidation activity (56.8 mA/cm² at 1.35 V), significantly outperforming Ni3S2 NWs.
- The Ni2Co1S2 catalyst also exhibited high activity for glycerol and ethylene glycol oxidation.
- Enhanced AOR activity is attributed to optimized charge redistribution induced by cobalt doping, promoting Ni(III) species formation.
Conclusions:
- Cobalt doping in nickel sulfide nanowires significantly enhances AOR catalytic performance.
- The study highlights the potential of foreign element doping to improve catalyst efficiency through charge redistribution.
- The developed Ni2Co1S2 NWs show promise as efficient electrocatalysts for AOR applications.
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