Cu-based catalysts for electrocatalytic nitrate reduction to ammonia: fundamentals and recent advances

Zhang, Kouer; Liu, Yun; Pan, Zhefei; Xia, Qing; Huo, Xiaoyu; Esan, Oladapo Christopher; Zhang, Xiao; An, Liang

doi:10.1039/d4ey00002a

Cited by 7 publications

(3 citation statements)

References 182 publications

(306 reference statements)

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“…The current rise is most evident in the studied potential region for Fe(5min)@Co(30min)/C and Fe(30min)/C. According to the literature, several reduction peaks on LsV correspond to the sequential reduction of nitrate to ammonia via intermediates [18,19]. For Fe(30min)/C, it can be assumed that the part of the current that contributes to side reactions (nitrogen release and HER) reduces, respectively, the ammonia yield in terms of the FE value.…”

Section: Linear Voltammetry Researchesmentioning

confidence: 75%

“…The hydrogen release is also preferable from the kinetic point of view, because fewer electrons are required [8]. Based on the above, one of the criteria for the NO3RR selectivity [18] is the evaluation of the NO3RR selectivity compared to HER. Other important characteristics of electrocatalytic reduction are the Faradaic efficiency (FE, %), ammonia yield rate (mol s -1 ), turnover frequencies (TOF), energy efficiency (EE, %), and NO3 -conversion.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticles Based Bimetallic Electrocatalyst

Kuznetsova,

Lebedeva,

Kultin

et al. 2024

Preprint

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Green and sustainable electrocatalytic conversion of nitrogen-containing compounds to ammonia are currently in high demand in order to replace the eco-unfriendly Haber-Bosch process. Model catalysts for the nitrate reduction reaction were obtained by electrodeposition of metal Co, Fe and bimetallic Fe/Co nanoparticles from aqueous solutions onto a graphite substrate. The samples were characterized by the following methods: SEM, XRD, XPS, UV-vis spectroscopy, cyclic (and linear) voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Besides, the determination of electrochemically active surface was also performed for all electrocatalysts. The best electrocatalyst was a sample containing Fe-nanoparticles on the layer of Co-nanoparticles, which showed the Faradaic efficiency 58.2% (E=-0.785 V vs. RHE) at the ammonia yield rate of 14.6 μmol h-1 cm-2. An opinion was expressed on elucidation of the mechanism of coordinated electrocatalytic action of a bimetallic electrocatalyst. This work can serve primarily as a starting point for future investigations on electrocatalytic conversion reactions to ammonia using model catalysts of the proposed type.

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Section: Linear Voltammetry Researchesmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticles Based Bimetallic Electrocatalyst

Kuznetsova,

Lebedeva,

Kultin

et al. 2024

Preprint

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“…In existing studies, ,, in situ Raman spectroscopy has been used to detect truly active substances during electrochemical nitrate reduction under electrochemical conditions as well as in the presence of water. Additionally, in situ X-ray absorption spectroscopy (XAS) has been employed to provide a large amount of data on the chemical bonding, coordination number, and valence state of catalytically active substances to determine their species.…”

Section: Mechanisms and Pathways Of Electrochemical Nitrate Reductionmentioning

confidence: 99%

Recent Progress and Perspectives on Transition Metal-Based Electrocatalysts for Efficient Nitrate Reduction

Zhou,

Gao,

2024

Energy Fuels

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Electrochemical nitrate reduction is the process of converting nitrate into ammonia or nitrogen using electric energy. This saves energy, protects the environment, and is an important technology for nitrogen resource recovery and water purification. This paper examines recent advances in electrochemical nitrate reduction technology research and analyzes the reaction mechanism and path of electrochemical nitrate reduction as well as the influence of various factors on the reaction path through thermodynamic and kinetic principles. Second, the catalytic performances of transition metal electrocatalysts in the form of single metals, alloys, oxides, and composites in electrochemical nitrate reduction are analyzed in detail, which lays the foundation for the rational development of new, efficient, and stable electrocatalysts. Finally, future development directions and prospects for electrochemical nitrate reduction technology are envisioned.

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Nitrate Reduction Catalyzed by Bimetallic Silver‐Copper Macroporous Foams

Sun,

Zhou,

Loyaux‐Lawniczak

et al. 2024

ChemCatChem

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IIn this work we describe the use of bimetallic silver‐copper macroporous foams for electrochemical nitrate reduction in acidic conditions (pH 2, 0.1 M NaClO4). By carefully selecting the composition of the electrodeposition bath, we have successfully prepared foams with atomic percentage varying from Ag dominant to Cu dominant. Also, we have succeeded to obtain morphologies that vary between the one specific to pure Ag foam to the one specific to pure Cu foam. We have shown that these foams contain a pure silver phase and also a silver‐copper alloy. The electrochemical active surface area of the foams depends both on the morphology as well as on the atomic composition. These materials were used for the first time as catalysts for nitrate electrochemical reaction (NO3RR). Both liquid and gaseous products were quantified with several analytical techniques. It was shown that bimetallic foams present superior faradaic efficiency (FE) towards liquid products in comparisons with pure silver and copper foams, suggesting a synergetic contribution from both metals. The Ag94Cu6 (AgCu10) foam shows a FE as high as 92% towards liquid products and the lowest FE (3%) towards the undesired product, nitrous acid. Also, this material shows a better stability than pure copper materials.

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Cu-based catalysts for electrocatalytic nitrate reduction to ammonia: fundamentals and recent advances

Abstract: Electrocatalytic nitrate reduction has been identified as a promising technology for green ammonia production, allowing the conversion of harmful nitrate from wastewater into valuable ammonia using renewable electricity under ambient...

Cited by 7 publications

References 182 publications

Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticles Based Bimetallic Electrocatalyst

Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticles Based Bimetallic Electrocatalyst

Recent Progress and Perspectives on Transition Metal-Based Electrocatalysts for Efficient Nitrate Reduction

Nitrate Reduction Catalyzed by Bimetallic Silver‐Copper Macroporous Foams

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