Electrochemical Nitrate Reduction: Ammonia Synthesis and the Beyond

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(17)

Published: June 9, 2023

Natural nitrogen cycle has been severely disrupted by anthropogenic activities. The overuse of N-containing fertilizers induces the increase nitrate level in surface and ground waters, substantial emission oxides causes heavy air pollution. Nitrogen gas, as main component air, used for mass ammonia production over a century, providing enough nutrition agriculture to support world population increase. In last decade, researchers have made great efforts develop processes under ambient conditions combat intensive energy consumption high carbon associated with Haber-Bosch process. Among different techniques, electrochemical reduction reaction (NO

Language: Английский

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Recent Advances in Electrocatalysts for Efficient Nitrate Reduction to Ammonia

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(43)

Published: June 25, 2023

Abstract Ammonia as an irreplaceable chemical has been widely demanded to keep the sustainable development of modern society. However, its industrial production consumes huge energy and releases extraordinary green‐house gases, leading various environmental issues. To achieve green ammonia is a great challenge that extensively pursued recently. In review, most promising strategy, electrochemical nitrate reduction reaction (e‐NO 3 RR) for purpose comprehensively investigated give full understanding mechanism provide guidance future directions. Particularly, electrocatalysts focused realize high yield rate Faraday efficiency applications. The recent‐developed catalysts, including noble metallic materials, alloys, metal compounds, single‐metal‐atom metal‐free are systematically discussed review effects factors on catalytic performance in e‐NO RR. Accordingly, strategies, defects engineering, coordination environment modulating, surface controlling, hybridization, carefully improve performance, such intrinsic activity selectivity. Finally, perspectives challenges given out. This shall insightful advanced systems efficiently industry.

Language: Английский

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Strategies and applications of electrocatalytic nitrate reduction towards ammonia

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 506, P. 215723 - 215723

Published: Feb. 26, 2024

Language: Английский

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Ultrathin High‐Entropy Fe‐Based Spinel Oxide Nanosheets with Metalloid Band Structures for Efficient Nitrate Reduction toward Ammonia

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(27)

Published: April 19, 2024

Abstract Spinel oxides with tunable chemical compositions have emerged as versatile electrocatalysts, however their performance is greatly limited by small surface area and low electron conductivity. Here, ultrathin high‐entropy Fe‐based spinel nanosheets are rationally designed (i.e., (Co 0.2 Ni Zn Mg Cu )Fe 2 O 4 ; denotes A 5 Fe ) in thickness of ≈4.3 nm large highly exposed active sites via a modified sol–gel method. Theoretic experimental results confirm that the bandgap significantly smaller than ordinary oxides, realizing transformation binary oxide from semiconductors to metalloids. As result, such manifest excellent for nitrate reduction reaction (NO 3 − RR) ammonia (NH ), NH yield rate ≈2.1 mmol h −1 cm −2 at −0.5 V versus Reversible hydrogen electrode, outperforming other spinel‐based electrocatalysts. Systematic mechanism investigations reveal NO RR mainly occurred on sites, introducing tetrahedral regulates adsorption strength N O‐related intermediates boosting RR. The above findings offer platform regulate enhance electrocatalytic oxides.

Language: Английский

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Metal Doped Unconventional Phase IrNi Nanobranches: Tunable Electrochemical Nitrate Reduction Performance and Pollutants Upcycling

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(24), P. 10863 - 10873

Published: June 6, 2024

Electrochemical nitrate reduction (NO3RR) provides a new option to abate contamination with low carbon footprint. Restricted by competitive hydrogen evolution, achieving satisfied performance in neutral media is still challenge, especially for the regulation of this multielectron multiproton reaction. Herein, facile element doping adopted tune catalytic behavior IrNi alloy nanobranches an unconventional hexagonal close-packed (hcp) phase toward NO3RR. In particular, obtained hcp IrNiCu favor ammonia production and suppress byproduct formation electrolyte indicated situ differential electrochemical mass spectrometry, high Faradaic efficiency (FE) 85.6% large yield rate 1253 μg cm–2 h–1 at −0.4 −0.6 V (vs reversible electrode (RHE)), respectively. contrast, resultant IrNiCo promote nitrite, peak FE 33.1% −0.1 RHE). Furthermore, hybrid electrolysis cell consisting NO3RR formaldehyde oxidation constructed, which are both catalyzed nanobranches. This electrolyzer exhibits lower overpotential holds potential treat polluted air wastewater simultaneously, shedding light on green chemical based contaminate degradation.

Language: Английский

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Mechanochemical route to fabricate an efficient nitrate reduction electrocatalyst

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 4889 - 4897

Published: Feb. 8, 2024

Language: Английский

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Carbon dots-boosted active hydrogen for efficient electrocatalytic reduction of nitrate to ammonia

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 178694 - 178694

Published: Jan. 1, 2025

Language: Английский

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FeNi₃ nanoparticles for electrocatalytic synthesis of urea from carbon dioxide and nitrate

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(20), P. 4952 - 4960

Published: Jan. 1, 2023

FeNi 3 alloy is adopted for catalyzing nitrate and carbon dioxide reduction to produce urea at ambient conditions. The catalyst delivers a larger yield rate faradaic efficiency in comparison with the counterparts.

Language: Английский

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Gram‐level NH₃ Electrosynthesis via NO_x reduction on a Cu Activated Co Electrode

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(1)

Published: Nov. 13, 2023

Abstract Ambient electrochemical ammonia (NH 3 ) synthesis is one promising alternative to the energy‐intensive Haber–Bosch route. However, industrial requirement for NH production with amperes current densities or gram‐level yield remains a grand challenge. Herein, we report high‐rate via NO 2 − reduction using Cu activated Co electrode in bipolar membrane (BPM) assemble electrolyser, wherein BPM maintains ion balance and liquid level of electrolyte. Benefited from abundant sites optimal structure, target modified foam delivers density 2.64 A cm −2 Faradaic efficiency 96.45 % high rate 279.44 mg h −1 H‐type cell alkaline Combined situ experiments theoretical calculations, found that optimizes adsorption behavior facilitates hydrogenation steps on toward rapid process. Importantly, this affords large up 4.11 g homemade reactor, highlighting its large‐scale practical feasibility.

Language: Английский

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Recent progress and challenges in structural construction strategy of metal-based catalysts for nitrate electroreduction to ammonia

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 86, P. 69 - 83

Published: July 20, 2023

Language: Английский

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