Advances in ammonia electrosynthesis from ambient nitrate/nitrite reduction

Chem, Год журнала: 2023, Номер 9(7), С. 1768 - 1827

Опубликована: Июнь 21, 2023

Язык: Английский

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Electrochemical Nitrate Reduction: Ammonia Synthesis and the Beyond

Advanced Materials, Год журнала: 2023, Номер 36(17)

Опубликована: Июнь 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

Язык: Английский

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Unveiling Cutting‐Edge Developments in Electrocatalytic Nitrate‐to‐Ammonia Conversion

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 11, 2024

The excessive enrichment of nitrate in the environment can be converted into ammonia (NH

Язык: Английский

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Emerging Applications, Developments, Prospects, and Challenges of Electrochemical Nitrate‐to‐Ammonia Conversion

Advanced Functional Materials, Год журнала: 2023, Номер 33(29)

Опубликована: Апрель 23, 2023

Abstract Ammonia is not only an important feedstock for chemical industry but also a carbon‐free energy carrier and safe storage media hydrogen. Due to the advantages compared Haber–Bosch process, electrochemical NO 3 − ‐to‐NH conversion via nitrate reduction reaction (NO RR) received attention. Recently, “green hydrogen” generated from water electrolysis shows promise become future limited by safety of transportation. This review proposes can store renewable electric into NH , which potential solution solving puzzle Moreover, theoretical insights RR electrocatalyst design are discussed. Finally, challenges opportunities in this field elucidated. provides novel perspective accelerates development effective electrocatalysts conversion.

Язык: Английский

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Recent Advances in Electrocatalysts for Efficient Nitrate Reduction to Ammonia

Advanced Functional Materials, Год журнала: 2023, Номер 33(43)

Опубликована: Июнь 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.

Язык: Английский

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Recent progress and strategies on the design of catalysts for electrochemical ammonia synthesis from nitrate reduction

Inorganic Chemistry Frontiers, Год журнала: 2023, Номер 10(12), С. 3489 - 3514

Опубликована: Янв. 1, 2023

Ammonia (NH3) is an essential raw material in the production of fertilizers and a promising carbon-free energy carrier, however, its synthesis still depends on energy- capital-intensive Haber–Bosch process. Recently, electrochemical N2 reduction reaction has attracted significant interest as emerging method for NH3 under ambient conditions. However, limited solubility aqueous electrolyte strong NN bonds result low yield rate, inferior faradaic efficiency unsatisfactory selectivity, impeding further practical application. Considering high water nitrate (NO3−), NO3− (NO3−RR) become fascinating route achieving sustainable NH3, enormous progress been made this field. As consequence, review discusses mechanism systematically summarizes recent development electrocatalysts NO3−RR, including noble-metal-based materials, single-atom metal catalysts, transition-metal-based catalysts. Diverse design strategies catalysts to boost NO3−RR performance, such defect engineering, rational structure design, strain engineering constructing heterostructures, are discussed. This followed by illustration how robust understanding optimization affords fundamental insights into efficiency, selectivity electrocatalysts. Finally, we conclude with future perspectives critical issues, challenges research directions high-efficiency selective NH3.

Язык: Английский

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Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(5)

Опубликована: Дек. 5, 2022

We propose the pseudobrookite Fe2 TiO5 nanofiber with abundant oxygen vacancies as a new electrocatalyst to ambiently reduce nitrate ammonia. Such catalyst achieves large NH3 yield of 0.73 mmol h-1 mg-1cat. and high Faradaic Efficiency (FE) 87.6 % in phosphate buffer saline solution 0.1 M NaNO3 , which is lifted 1.36 96.06 at -0.9 V vs. RHE for nitrite conversion ammonia NaNO2 . It also shows excellent electrochemical durability structural stability. Theoretical calculation reveals enhanced conductivity this an extremely low free energy -0.28 eV adsorption presence vacant oxygen.

Язык: Английский

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Boosting Electrocatalytic Nitrate Reduction to Ammonia via Promoting Water Dissociation

ACS Catalysis, Год журнала: 2023, Номер 13(16), С. 10846 - 10854

Опубликована: Авг. 2, 2023

Electrocatalytic nitrate reduction reaction (NO3–RR) opens opportunities for ammonia production. The sluggish kinetics of this multielectron and multiproton process has been regarded as the key issue. Herein, we report a Cu1Co5 alloy electrocatalytic NO3–RR to NH3. It achieves high current density (453 mA cm–2) Faradaic efficiency (96.2%) NH3 production at 0.075 V vs RHE, with half-cell energy 44.9%, higher than those Cu, Co, other Co-based alloys, is among highest value reported. We found that interaction between Cu Co reorganizes their electronic structure in alloys. NO3– adsorption switches spontaneous process, *NO → *N *NH *NH2 processes are promoted. Importantly, water dissociation concerted transformation N-species proven be rate-determining, which facilitated on sites essential enhanced NO3–RR. This inspires us strategy designing more efficient catalysts under alkaline condition by promoting H2O process.

Язык: Английский

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Oxygen vacancies in Co₃O₄nanoarrays promote nitrate electroreduction for ammonia synthesis

Sustainable Energy & Fuels, Год журнала: 2022, Номер 6(18), С. 4130 - 4136

Опубликована: Янв. 1, 2022

Oxygen vacancy-enriched Co 3 O 4 nanosheet arrays enable ambient electrosynthesis of NH via nitrate reduction, achieving a faradaic efficiency 96.9% and yield 12 157 μg h −1 cm −2 in 0.1 M NaOH with NO − .

Язык: Английский

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Thermally Enhanced Relay Electrocatalysis of Nitrate-to-Ammonia Reduction over Single-Atom-Alloy Oxides

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(11), С. 7779 - 7790

Опубликована: Март 11, 2024

The electrochemical nitrate reduction reaction (NO3RR) holds promise for converting nitrogenous pollutants to valuable ammonia products. However, conventional electrocatalysis faces challenges in effectively driving the complex eight-electron and nine-proton transfer process of NO3RR while also competing with hydrogen evolution reaction. In this study, we present thermally enhanced nitrate-to-ammonia conversion over nickel-modified copper oxide single-atom alloy nanowires. catalyst demonstrates improved production performance a Faradaic efficiency approximately 80% yield rate 9.7 mg h–1 cm–2 at +0.1 V versus reversible electrode elevated cell temperatures. addition, system displays impressive stability, interference resistance, favorable energy consumption greenhouse gas emissions simulated industrial wastewater treatment. Complementary situ analyses confirm that significantly superior relay active species formed Ni sites facilitates thermal-field-coupled Cu surface-adsorbed *NOx hydrogenation. Theoretical calculations further support thermodynamic kinetic feasibility catalysis mechanism Ni1Cu model catalyst. This study introduces conceptual thermal-electrochemistry approach synergistic regulation catalytic processes, highlighting potential multifield-coupled advance sustainable-energy-powered chemical synthesis technologies.

Язык: Английский

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