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Customizing Bonding Affinity with Multi-Intermediates via Interfacial Electron Capture to Boost Hydrogen Evolution in
Liu Yang1, Huibing Liu2, Ying Li1
1State Key Laboratory of Catalysis, Power Battery & Systems Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 110623, China.
Angewandte Chemie (International Ed. in English)
|October 24, 2024
Summary
Developing advanced electrocatalysts for alkaline hydrogen evolution reaction (HER) is crucial for sustainable energy. This study introduces a novel dual-nitride heterostructure catalyst that enhances hydrogen production efficiency and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Energy
Background:
- Efficient and earth-abundant alkaline electrocatalysts for hydrogen evolution reaction (HER) are essential for sustainable energy solutions.
- Co-regulating the multi-step alkaline HER process, including water dissociation, OH- desorption, and hydrogen generation, remains a significant challenge.
Purpose of the Study:
- To develop a novel catalyst that effectively co-regulates the intricate multi-step alkaline HER process.
- To fine-tune the bonding affinity with alkaline HER intermediates for enhanced efficiency and stability.
Main Methods:
- Fabrication of a vertically integrated electrode with a nanosheet array featuring dual-nitride metallic heterostructures (WN-NiN/CFP).
- Utilized detailed structural characterization and theoretical calculations to elucidate catalyst properties.
- Evaluated catalytic performance in alkaline HER and overall water splitting.
Main Results:
- The WN-NiN/CFP catalyst exhibited a low overpotential of 36.8 mV at 10 mA/cm² for alkaline HER.
- Demonstrated remarkable operational stability, maintaining performance for 1300 hours at 100 mA/cm² during overall water splitting.
- Theoretical calculations revealed charge redistribution at the heterointerface enhances intermediate transfer and hydrogen release.
Conclusions:
- The developed dual-nitride heterostructure catalyst effectively optimizes multiple site-intermediate interactions in alkaline HER.
- Presents a viable strategy for designing efficient electrocatalysts for sustainable hydrogen production and energy conversion.
- The WN-NiN/CFP catalyst shows significant promise for practical applications in overall water splitting.
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