MOF membrane boosts electrocatalytic nitrogen reduction on perovskite oxides
The electrochemical nitrogen reduction reaction (NRR) under ambient conditions presents a promising approach for the eco-friendly and sustainable synthesis of ammonia, with a continuous emergence of potential electrocatalysts. However, the low solubility and limited diffusion of N2 significantly hin...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-07-01
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| Series: | Green Energy & Environment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S246802572500038X |
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| Summary: | The electrochemical nitrogen reduction reaction (NRR) under ambient conditions presents a promising approach for the eco-friendly and sustainable synthesis of ammonia, with a continuous emergence of potential electrocatalysts. However, the low solubility and limited diffusion of N2 significantly hinder the achievement of satisfactory performance. In this context, we report an effective strategy to enhance NRR activity by introducing a metal–organic framework (MOF) membrane, specifically MIL-53(Al), onto a perovskite oxide (LiNbO3), denoted as LN@MIL-X (X = 0.2, 0.4 and 0.6). The MIL-53(Al) membrane selectively recognizes and concentrates N2 at the catalyst interface while simultaneously repelling water molecules, thereby inhibiting the hydrogen evolution reaction (HER). This ultrathin nanostructure significantly improves the NRR performance of LN@MIL-X compared to pristine LiNbO3. Notably, LN@MIL-0.4 exhibits a maximum NH3 yield of 45.25 μg h−1 mgcat.−1 with an impressive Faradaic efficiency (FE) of 86.41% at −0.45 V versus RHE in 0.1 mol L−1 Na2SO4. This work provides a universal strategy for the design and synthesis of perovskite oxide electrocatalysts, facilitating high-efficiency ammonia synthesis. |
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| ISSN: | 2468-0257 |