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Published on: December 6, 2021
Stepwise construction of Ag29 nanocluster-based hydrogen evolution electrocatalysts
Honglei Shen1, Qingtao Zhu1, Jiawei Xu1
1Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, P. R. China. shangao@ahu.edu.cn.
Researchers enhanced the electrocatalytic hydrogen evolution reaction (HER) efficiency using a silver nanocluster template. Atomically precise modifications yielded a highly efficient platinum-silver nano-catalyst for HER, advancing nanocluster electrocatalysis.
Area of Science:
- Nanomaterials Science
- Electrochemistry
- Catalysis
Background:
- Silver-based nanoclusters are structurally characterized but underexplored for electrochemical catalysis.
- Existing silver nanoclusters exhibit limited electrocatalytic activity, particularly for the hydrogen evolution reaction (HER).
Purpose of the Study:
- To systematically enhance the electrocatalytic HER efficiency of silver nanoclusters.
- To develop a highly efficient nano-catalyst for HER using precise structural modifications of a silver nanocluster template.
Main Methods:
- Utilized an Ag29 nanocluster as a template for stepwise catalyst enhancement.
- Employed atomically precise operations: kernel alloying, ligand engineering, and surface activation.
- Combined experimental characterization with theoretical modeling to understand structure-performance relationships.
Main Results:
- Developed a Pt1Ag28-BTT-Mn(10) nano-catalyst with significantly improved HER efficiency.
- Demonstrated the correlation between nanocluster structure and HER performance at the atomic level.
- Achieved enhanced electrocatalytic capacity through precise structural control.
Conclusions:
- The Ag29 cluster system allows for atomic-level understanding of structure-activity relationships in catalysis.
- Atomically precise modification strategies are effective for creating high-performance electrocatalysts.
- This work provides a pathway for designing customized nanocluster-based catalysts with superior electrocatalytic capabilities.
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