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This research demonstrates improved ammonia production in carbon nanotubes using a novel catalyst, suggesting enhanced selectivity and stability.
The electrochemical nitrate reduction reaction (NO 3 RR) has attracted considerable attention for the sustainable production of NH 3 , urea, amino acids, and other value‐added chemicals. Among these, NH 3 is particularly significant due to its large‐scale industrial synthesis via the Haber–Bosch process. Herein, we report the design of an efficient NO 3 RR catalyst prepared through a simple synthesis route. Fe 2 O 3 clusters (2–5 nm) were uniformly deposited on iron phthalocyanine (FePc)‐modified N‐doped carbon nanotubes (Fe 2 O 3 /FePc/CNT), yielding a high NH 3 production rate of 58.67 mg h −1 cm −2 with a Faradaic efficiency (FE) of 81.89% at −1.0 V versus RHE. Comparative studies with FePc/CNT, Pc/CNT, and Fe 2 O 3 /CNT confirmed the synergistic effect between Fe 2 O 3 clusters and FePc, with the optimized Fe 2 O 3 /FePc/CNT catalyst showing superior activity and selectivity. Furthermore, the optimized catalyst exhibited excellent stability for 24 h. A possible mechanism for NH 3 formation is proposed on the basis of the reaction intermediates identified by ex situ FTIR and x‐ray photoelectron spectroscopy (XPS) analyses.
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Sherpa et al. (2025) studied this question.
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