Carbon Hollow Fiber Penetration Electrode with Unsaturated Ni‐N2 Coordination for Enhanced CO2 Electroreduction
Abstract Hollow fiber gas penetration electrodes with a compact hierarchical pore structure have emerged as promising platforms for CO2 electroreduction. However, developing carbon hollow fiber electrodes with efficient CO2 electrocatalytic performance remains unexplored and challenging. Herein, a s...
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-08-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202502947 |
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| Summary: | Abstract Hollow fiber gas penetration electrodes with a compact hierarchical pore structure have emerged as promising platforms for CO2 electroreduction. However, developing carbon hollow fiber electrodes with efficient CO2 electrocatalytic performance remains unexplored and challenging. Herein, a straightforward strategy is presented to fabricate robust, self‐standing carbon hollow fiber electrodes modified with an unsaturated Ni‐N2 coordination structure. This unique hollow fiber electrode configuration effectively enhances the kinetics of CO2 electro‐conversion to CO. Both density functional theory (DFT) calculations and experimental studies reveal that the Ni‐N2 structure significantly boosts electrocatalytic activity for CO2 reduction by reducing the energy barrier for the key intermediate COOH* formation. Consequently, the electrode with unsaturated Ni‐N2 coordination realizes a high CO Faradaic efficiency (FE) (>90%) as well as a partial current density of 61 mA cm−2, much superior to those of saturated Ni‐N4 coordination. In particular, this high performance maintains an exceptional durability for over 100 h, outperforming previously reported carbon supporting electrodes featuring Ni‐N‐C sites. This work opens new avenues for designing advanced carbon electrode structures with enhanced selectivity and activity for CO2 reduction. |
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| ISSN: | 2198-3844 |