Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120010 - e9120010

Published: May 30, 2022

To restore the natural nitrogen cycle (N-cycle), artificial N-cycle electrocatalysis with flexibility, sustainability, and compatibility can convert intermittent renewable energy (e.g., wind) to harmful or value-added chemicals minimal carbon emissions. The background of such N-cycles, as fixation, ammonia oxidation, nitrate reduction, is briefly introduced here. discussion emerging nanostructures in various conversion reactions focused on architecture/compositional design, electrochemical performances, reaction mechanisms, instructive tests. Energy device advancements for achieving more functions well in situ/operando characterizations toward understanding key steps are also highlighted. Furthermore, some recently proposed less discussed C–N coupling summarized. We classify inorganic sources that each other under an applied voltage into three types, namely, abundant nitrogen, toxic (nitrite), oxides, useful compounds ammonia, hydrazine, hydroxylamine, goal providing critical insights strategies facilitate development our circular economy.

Language: Английский

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Bimetallic metal–organic frameworks and MOF-derived composites: Recent progress on electro- and photoelectrocatalytic applications

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 451, P. 214264 - 214264

Published: Oct. 25, 2021

Language: Английский

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Tackling orientation of metal-organic frameworks (MOFs): The quest to enhance MOF performance

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 481, P. 215043 - 215043

Published: Feb. 13, 2023

As the structure and properties of anisotropic metal–organic frameworks (MOFs) vary with certain directions in space, controlling orientation these MOFs allows full advantage to be taken their properties. Not surprisingly, preparation oriented MOFs, has drawn great attention past decade. In this review, we systematically summarized strategies utilized for growth highlighting possibilities each synthetic approach as well challenges they have overcome. Herein, also explored MOF-on-MOF hybrids. Finally, presented advantages MOF crystals over randomly counterparts different applications, including adsorptions, separations, catalysis, sensing, energy storage, etc. We hope review shows tremendous helps reader better comprehend synthesis, properties, applications.

Language: Английский

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Efficient Ammonia Electrosynthesis and Energy Conversion through a Zn‐Nitrate Battery by Iron Doping Engineered Nickel Phosphide Catalyst

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(13)

Published: Feb. 9, 2022

Abstract The electrocatalytic nitrate reduction reaction (NO 3 ‐RR) to ammonia (NH ) offers a promising alternative approach for NH production and nitrate‐based voltaic cells which can deliver both electricity as products, are also highly attractive. However, nitrate‐to‐NH conversion involves proton‐assisted multiple‐electron transfer process with considerable kinetic barrier, underlying the need efficient catalysts NO – RR. A Zn‐nitrate battery is reported enable “killing three birds one stone” strategy energy supply, removal of pollutants iron doped nickel phosphide (Fe/Ni 2 P) RR catalyst electrode. Iron doping induces downshift d‐band center Ni atoms Fermi level, allowing optimization Gibbs free energies intermediates. Fe/Ni P exhibits 94.3% Faradaic efficiency (FE) nearly 100% at –0.4 V vs. reversible hydrogen electrode (RHE). Further applying this electrocatalyst cathode material, novel power density 3.25 mW cm –2 FE 85.0% production. This work enriches application Zn‐based batteries in field electrocatalysis highlights promise bimetal

Language: Английский

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Recent advances in electrocatalytic ammonia synthesis

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 50, P. 6 - 44

Published: July 1, 2023

Language: Английский

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Interfacial polarization in metal-organic framework reconstructed Cu/Pd/CuOx multi-phase heterostructures for electrocatalytic nitrate reduction to ammonia

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 318, P. 121805 - 121805

Published: July 28, 2022

Language: Английский

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Strategies for enhancing the catalytic activity and electronic conductivity of MOFs-based electrocatalysts

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 478, P. 214969 - 214969

Published: Dec. 14, 2022

Language: Английский

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Metal–Organic Framework‐Based Nanomaterials for Electrocatalytic Oxygen Evolution

Small Methods, Journal Year: 2022, Volume and Issue: 6(10)

Published: Sept. 1, 2022

Abstract Oxygen evolution reaction (OER) is an energy‐determined half‐reaction for water splitting and many other energy conversion processes, such as rechargeable metal–air batteries CO 2 reduction, due to its four‐electron sluggish process. To reduce the consumption cost of these advanced technologies, various transition metal‐based nanomaterials, like metal oxides/hydroxides, nitride, phosphide are synthesized. Among these, metal–organic framework (MOF)‐based materials considered ideal candidate fabrication efficient OER electrocatalysts owing their unique physicochemical properties. In this review, fundamental catalytic mechanisms key evaluation parameters in acidic alkaline media presented first. Then, design strategies MOF‐based catalysts research progress study structure–performance relationship summarized. Subsequently, recent advances alkaline, acidic, neutral electrolytes overviewed. Finally, current challenges future opportunities provided under frame design, theoretical understanding, characterization techniques, industrial applications.

Language: Английский

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Nitrogenase-Inspired Atomically Dispersed Fe–S–C Linkages for Improved Electrochemical Reduction of Dinitrogen to Ammonia

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(2), P. 1443 - 1451

Published: Jan. 10, 2022

The electrochemical nitrogen reduction reaction (NRR) provides a sustainable alternative to the Haber–Bosch process for ammonia (NH3) production. Transition metal catalysts have poor NRR performance due highly competitive hydrogen evolution and scaling relation between inert dinitrogen (N2) other intermediates. Owing enhanced active sites anomalous quantum size effect, single-atom (SACs) been proven be effective in overcoming these limitations. Inspired by our understanding of metal–sulfur (M–S) linkages nitrogenase enzyme, we modulated electronic structure iron tethering sulfur mesoporous carbon matrix. Theoretical calculations identified electron transfer flexible coordination as important features Fe–S–C responsible improved performance, which is achieved N2 interaction with localized charge density formed linkages. A high faradaic efficiency (6.1 ± 0.9%) an rate NH3 formation (8.8 1.3 μg h–1 mg–1) obtained on best-performing sample at −0.1 V versus RHE. Our work reveals importance M–S strategy rational catalyst design.

Language: Английский

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Activating Lattice Oxygen in Spinel Oxides via Engineering Octahedral Sites for Oxygen Evolution

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(8), P. 3504 - 3511

Published: July 26, 2023

Spinel oxides, representing an emerging class of highly active catalysts for oxygen evolution (OER), suffer from weak covalency metal d and p orbitals their typical crystal structure, which generally proceeds the OER with adsorbate mechanism (AEM) pathway. For activating lattice in spinel oxides to bypass scaling relationship limitation AEM, we herein grow sulfate salts on octahedral sites NiFe2O4 introduce Ni4+ cations Ni vacancies sites, exhibit remarkable performance overpotential 293 mV at 500 mA cm–2. Experiments theoretical calculations reveal that formation jointly enhance metal–oxygen hybridization strengthen bond both NiFeOOH phases, successfully triggering (LOM) pathway oxides.

Language: Английский

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