Crystal Phase Engineering of Ultrathin Alloy Nanostructures for Highly Efficient Electroreduction of Nitrate to Ammonia

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

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Detail(s)

Original languageEnglish
Article number2313548
Journal / PublicationAdvanced Materials
Volume36
Issue number14
Online published26 Jan 2024
Publication statusPublished - 4 Apr 2024

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Abstract

Electrocatalytic nitrate reduction reaction (NO3RR) toward ammonia synthesis is recognized as a sustainable strategy to balance the global nitrogen cycle. However, it still remains a great challenge to achieve highly efficient ammonia production due to the complex proton-coupled electron transfer process in NO3RR. Here, the controlled synthesis of RuMo alloy nanoflowers (NFs) with unconventional face-centered cubic (fcc) phase and hexagonal close-packed/fcc heterophase for highly efficient NO3RR is reported. Significantly, fcc RuMo NFs demonstrate high Faradaic efficiency of 95.2% and a large yield rate of 32.7 mg h−1 mgcat−1 toward ammonia production at 0 and −0.1 V (vs reversible hydrogen electrode), respectively. In situ characterizations and theoretical calculations have unraveled that fcc RuMo NFs possess the highest d-band center with superior electroactivity, which originates from the strong Ru─Mo interactions and the high intrinsic activity of the unconventional fcc phase. The optimal electronic structures of fcc RuMo NFs supply strong adsorption of key intermediates with suppression of the competitive hydrogen evolution, which further determines the remarkable NO3RR performance. The successful demonstration of high-performance zinc-nitrate batteries with fcc RuMo NFs suggests their substantial application potential in electrochemical energy supply systems. © 2024 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Research Area(s)

  • ammonia, crystal phase engineering, electrocatalysis, nitrate reduction reaction, ultrathin alloy nanostructures

Citation Format(s)

Crystal Phase Engineering of Ultrathin Alloy Nanostructures for Highly Efficient Electroreduction of Nitrate to Ammonia. / Wang, Yunhao; Hao, Fengkun; Sun, Mingzi et al.
In: Advanced Materials, Vol. 36, No. 14, 2313548, 04.04.2024.

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

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