Enabled Efficient Ammonia Synthesis and Energy Supply in a Zinc–Nitrate Battery System by Separating Nitrate Reduction Process into Two Stages

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(13)

Опубликована: Фев. 2, 2023

The aqueous electrocatalytic reduction of NO3- into NH3 (NitrRR) presents a sustainable route applicable to production and potentially energy storage. However, the NitrRR involves directly eight-electron transfer process generally required large overpotential (<-0.2 V versus reversible hydrogen electrode (vs. RHE)) reach optimal efficiency. Here, inspired by biological nitrate respiration, was separated two stages along [2+6]-electron pathway alleviate kinetic barrier. system employed Cu nanowire catalyst produces NO2- with current efficiencies 91.5 % 100 %, respectively at lower overpotentials (>+0.1 vs. RHE). high efficiency for such further explored in zinc-nitrate battery. This battery could be specified output voltage 0.70 V, an average density 566.7 Wh L-1 10 mA cm-2 power 14.1 mW , which is well beyond all previously reported similar concepts.

Язык: Английский

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Ultralow-content Pd in-situ incorporation mediated hierarchical defects in corner-etched Cu2O octahedra for enhanced electrocatalytic nitrate reduction to ammonia

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 306, С. 121094 - 121094

Опубликована: Янв. 13, 2022

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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Electrochemical nitrate reduction in acid enables high-efficiency ammonia synthesis and high-voltage pollutes-based fuel cells

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Дек. 5, 2023

Abstract Most current research is devoted to electrochemical nitrate reduction reaction for ammonia synthesis under alkaline/neutral media while the investigation of acidic conditions rarely reported. In this work, we demonstrate potential TiO 2 nanosheet with intrinsically poor hydrogen-evolution activity selective and rapid conditions. Hybridized iron phthalocyanine, resulting catalyst displays remarkably improved efficiency toward formation owing enhanced adsorption, suppressed hydrogen evolution lowered energy barrier rate-determining step. Then, an alkaline-acid hybrid Zn-nitrate battery was developed high open-circuit voltage 1.99 V power density 91.4 mW cm –2 . Further, environmental sulfur recovery can be powered by above hydrazine-nitrate fuel cell simultaneously hydrazine/nitrate conversion electricity generation. This work demonstrates attractive electrosynthesis broadens field conversion.

Язык: Английский

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High-efficiency ammonia electrosynthesis via selective reduction of nitrate on ZnCo2O4 nanosheet array

Materials Today Physics, Год журнала: 2022, Номер 23, С. 100619 - 100619

Опубликована: Янв. 26, 2022

Язык: Английский

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A Zn–nitrite battery as an energy-output electrocatalytic system for high-efficiency ammonia synthesis using carbon-doped cobalt oxide nanotubes

Energy & Environmental Science, Год журнала: 2022, Номер 15(7), С. 3024 - 3032

Опубликована: Янв. 1, 2022

A Zn-NO 2 − battery with C/Co 3 O 4 catalyst cathode is developed as an energy-output electrocatalytic system that can simultaneously convert NO to NH high faradaic efficiency and supply electricity a power density of 6.03 mW cm −2 .

Язык: Английский

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Electrocatalytic nitrate-to-ammonia conversion with ~100% Faradaic efficiency via single-atom alloying

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 316, С. 121683 - 121683

Опубликована: Июнь 27, 2022

Язык: Английский

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High-Efficiency Electrochemical Nitrate Reduction to Ammonia on a Co₃O₄ Nanoarray Catalyst with Cobalt Vacancies

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(41), С. 46595 - 46602

Опубликована: Окт. 5, 2022

Electrocatalytic nitrate reduction reaction (NO3RR) affords a bifunctional character in the carbon-free ammonia synthesis and remission of pollution water. Here, we fabricated Co3O4 nanosheet array with cobalt vacancies on carbon cloth (vCo-Co3O4/CC) by situ etching aluminum-doped Co3O4/CC, which exhibits an excellent Faradaic efficiency 97.2% large NH3 yield as high 517.5 μmol h-1 cm-2, better than pristine Co3O4/CC. Theoretical calculative results imply that can tune local electronic environment around Co sites Co3O4, increasing charge reducing electron cloud density sites, is thus conducive to adsorption NO3- for greatly enhanced reduction. Furthermore, vCo-Co3O4 (311) facet presents NO3RR activity low energy barrier about 0.63 eV potential-determining step, much smaller (1.3 eV).

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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Laser-controlled tandem catalytic sites of CuNi alloys with ampere-level electrocatalytic nitrate-to-ammonia reduction activities for Zn–nitrate batteries

Energy & Environmental Science, Год журнала: 2023, Номер 16(7), С. 2991 - 3001

Опубликована: Янв. 1, 2023

Laser-constructed CuNi alloy electrodes with tandem sites of Ni provide H* and Cu for NO 3 − reduction, achieving ampere-level reduction high-performance Zn–NO batteries.

Язык: Английский

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