Atomic coordination environment engineering of bimetallic alloy nanostructures for efficient ammonia electrosynthesis from nitrate

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article numbere2306461120
Journal / PublicationProceedings of the National Academy of Sciences of the United States of America
Volume120
Issue number32
Online published31 Jul 2023
Publication statusPublished - 2023

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Abstract

Electrochemical nitrate reduction reaction (NO3RR) to ammonia has been regarded as a promising strategy to balance the global nitrogen cycle. However, it still suffers from poor Faradaic efficiency (FE) and limited yield rate for ammonia production on heterogeneous electrocatalysts, especially in neutral solutions. Herein, we report one-pot synthesis of ultrathin nanosheet-assembled RuFe nanoflowers with low-coordinated Ru sites to enhance NO3RR performances in neutral electrolyte. Significantly, RuFe nanoflowers exhibit outstanding ammonia FE of 92.9% and yield rate of 38.68 mg h-1 mgcat-1 (64.47 mg h-1 mgRu -1) at -0.30 and -0.65 V (vs. reversible hydrogen electrode), respectively. Experimental studies and theoretical calculations reveal that RuFe nanoflowers with low-coordinated Ru sites are highly electroactive with an increased d-band center to guarantee efficient electron transfer, leading to low energy barriers of nitrate reduction. The demonstration of rechargeable zinc-nitrate batteries with large-specific capacity using RuFe nanoflowers indicates their great potential in next-generation electrochemical energy systems. © 2023 the Author(s).

Research Area(s)

  • ammonia synthesis, atomic coordination environment, electrochemical nitrate reduction reaction, nitrogen cycle, Ultrathin metal nanostructures

Citation Format(s)

Atomic coordination environment engineering of bimetallic alloy nanostructures for efficient ammonia electrosynthesis from nitrate. / Wang, Yunhao; Sun, Mingzi; Zhou, Jingwen et al.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 120, No. 32, e2306461120, 2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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