Abstract
We have achieved the synthesis of dual-metal single atoms and atomic clusters that co-anchor on a highly graphitic carbon support. The catalyst comprises Ni4 (and Fe4) nanoclusters located adjacent to the corresponding NiN4 (and FeN4) single-atom sites, which is verified by systematic X-ray absorption characterization and density functional theory calculations. A distinct cooperation between Fe4 (Ni4) nanoclusters and the corresponding FeN4 (NiN4) atomic sites optimizes the adsorption energy of reaction intermediates and reduces the energy barrier of the potential-determining steps. This catalyst exhibits enhanced oxygen reduction and evolution activity and long-cycle stability compared to counterparts without nanoclusters and commercial Pt/C. The fabricated Zn-air batteries deliver a high power density and long-term cyclability, demonstrating their prospects in energy storage device applications.
Original language | English |
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Pages (from-to) | 8622-8633 |
Number of pages | 12 |
Journal | ACS Nano |
Volume | 17 |
Issue number | 9 |
DOIs | |
State | Published - 9 May 2023 |
Keywords
- bifunctional catalysts
- cooperation effect
- dual single atoms
- nanocluster
- oxygen reduction reaction
- zinc air battery