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MOF-derived Cu electrode for electrocatalytic nitrate reduction and ammonia production
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PRE
AI
F
H
武
J
J
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DOI：10.1007/s11164-026-06065-1.png)
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Abstract
En 中文
Excessive nitrate accumulation disrupts the nitrogen cycle, posing hazards to both ecosystems and human health. Electrocatalytic nitrate reduction to ammonia (ERNA) achieves the synergistic recovery of pollutant removal and high-value ammonia resources. The preparation of highly efficient and stable electrode materials remains a challenge for improving conversion efficiency. Metal–organic frameworks (MOFs) are widely utilized in catalysis and related fields due to their advantages of tunable porosity, diverse structures, and large specific surface areas. In this study, MOF-derived Cu-D catalytic electrode was prepared by combining anodic oxidation and in situ reduction methods for application in nitrate reduction reactions. The effects of catalyst preparation parameters as well as current and initial pH on its electrocatalytic performance were investigated. The results indicate that the MOF-derived Cu electrode synthesized by in situ electrochemical method formed a dendritic structure, which enlarged the surface area, exposed more active sites, and thereby enhanced the surface charge transfer efficiency. After continuous reaction at a current density of 20 mA cm−2 for 150 min, the Cu-D electrode achieved NO3− removal efficiency of 95.93% and NH4+ selectivity of 89.66%, respectively. The catalyst also exhibits good stability and durability.
Keywords:
Electrocatalysis
MOF-derived Cu electrode
Nitrate reduction
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3.5
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634
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