Theoretical Screening of Efficient TM/GaN Single-Atom Catalysts for Electroreduction of Nitrate to Ammonia

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 20, 2025

Language: Английский

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A Porous Copper Catalyst for Electrochemical Nitrate Reduction to Ammonium

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115596 - 115596

Published: Jan. 1, 2025

Language: Английский

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Copper Sulfide based Photocatalysts, Electrocatalysts and Photoelectrocatalysts: Innovations in Structural Modulation and Application

Small, Journal Year: 2024, Volume and Issue: 20(49)

Published: Sept. 29, 2024

Copper sulfides (Cu

Language: Английский

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Lattice hydrogen transfer in titanium hydride enhances electrocatalytic nitrate to ammonia conversion

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 3, 2024

The electrocatalytic reduction of nitrate toward ammonia under mild conditions addresses many challenges the Haber-Bosch reaction, providing a sustainable method for synthesis, yet it is limited by sluggish kinetics and multiple competing reactions. Here, titanium hydride electrocatalyst synthesized electrochemical hydrogenation reconstruction fiber paper, which achieves large yield rate 83.64 mg h−1 cm−2 high Faradaic efficiency 99.11% with an ampere-level current density 1.05 A at −0.7 V versus reversible hydrogen electrode. Electrochemical evaluation kinetic studies indicate that lattice transfer from promotes performance reaction equilibrium between activate not only improves activity but also demonstrates notable catalytic stability. These finding offers universal design principle metal hydrides as catalysts effectively production, highlighting their potential synthesis. to alternative process. authors report mechanism enhances enabling reactions active hydrogen.

Language: Английский

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Unraveling the Structural Evolution of Cobalt Sulfides in Electrocatalytic NO₃RR: the Inescapable Influence of Cl^–

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Electrochemical nitrate reduction (NO3RR) to ammonia is an attractive approach for mitigating NO3- pollution and producing valuable NH3. Cobalt-sulfur compounds are widely considered be potential electrocatalysts NO3RR. However, there still a lack of research on the probable structural evolution, long-term stability, reactive sites cobalt-based sulfides during catalysis. Herein, we have employed three cobalt (CoSx, where x = 8/9, 2, 1.097) with different sulfur contents as catalysts electrocatalytic NO3RR under alkaline conditions. At -0.8 V vs RHE, all these CoSx show promising performances that Faradaic efficiencies >80% high yield >1780 mmol h-1 gcat-1 NH3 production achieved. Through combination X-ray diffraction (XRD), transmission electron microscopy (TEM), other characterizations, it revealed easily converted into hydroxide This phenomenon seemingly contradictory thermodynamic prediction that, according Pourbaix diagram, should stable even catalytic condition. We suggest this due presence Cl- ions in electrolyte promote transformation toward Co(OH)2. Chloride commonly found both industrial settings natural water bodies challenging remove. The evolved Co(OH)2 species proposed responsible catalyzing NO3RR, especially process. study highlights inevitable evolution current conditions, offering theoretical guidance judicious selection design future catalysts.

Language: Английский

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A Rechargeable Zn‐Redox Battery for Concurrent Electricity Generation and The‐Whole‐Process Chemical Production

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Abstract The rechargeable Zn‐redox battery represents a promising, efficient, and sustainable energy storage technology. Herein, novel 4‐nitrobenzyl alcohol (4‐NBA)‐assisted battery, driven by NiSe─Cu 2 Se/NF bifunctional electrocatalysts is developed. different redox activities of ─NO ─OH groups in 4‐NBA allow conversion for chemical production during the whole discharge/charge process, maximizing economic value technologies. Detailed charge analyses indicate that internal electric field within Se heterostructure modulates d‐band center, optimizes adsorption/desorption strength intermediates, reduces reaction barriers 4‐NBA. This electrocatalyst enables selective to 4‐aminobenzyl discharge process 4‐nitrobenzoic acid with Faradaic efficiencies above 96%. Consequently, 4‐NBA‐assisted achieves high power density 16.13 mW cm −2 maintains stable yield rate 15.92 µmol h −1 22.84 acid. work presents an appealing strategy integrating the‐whole‐process production, paving way developing multifunctional systems.

Language: Английский

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Sulfur Defect Tuning of CuS/BiVO₄ and Understanding the Function of Hydrogen Radicals for Photoelectrochemical Ammonia Production

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Photoelectrochemical nitrate reduction has been a promising method for ammonia (NH3) production under normal temperatures and neutral conditions. However, hydrogenation is key process in the selective of NH3 during reduction; therefore, inducing active hydrogen inhibiting are noteworthy problem. In this study, BiVO4/CuS (BVO/CS) heterostructure constructed photoelectrochemical reaction (PEC NIRR). The introduction CuS optimizes electron-transfer ability enhances surface catalytic kinetics BVO/CS. At same time, presence sulfur vacancies on promotes adsorption activation nitrate, realizes splitting H2O, successfully generates abundant radicals (H*). generated H* effectively utilized NIRR. yield selectivity optimal BVO/CS reach 30.55 μg h-1 cm-2 43.8%, respectively, which 2.65 2.39 times that bare BVO. Therefore, work determines role hydrogenation, providing novel strategy boosting PEC CuS/BiVO4 was fabricated reduction. Sulfur defects enabled generation radicals, promoted production.

Language: Английский

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Sustainable ammonia synthesis: opportunities for electrocatalytic nitrate reduction

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Heterostructure‐Derived Heterovalent Fe(OH)₂/Fe Pair Sites: Tuning Adsorption of Intermediates and Enhancing Utilization of Atomic ^*H for Efficient Nitrate Reduction to Ammonia

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Abstract Electrocatalytic nitrate reduction (NO3RR) to valued ammonia is an ideal supplementary route the Haber–Bosch method and a strategy for removal utilization of pollutants. However, due fact that NO3RR goes through complicated multi‐electron/proton transfer, catalysts with monovalent metal sites are difficult tackle multitasking it involves, leading unsatisfactory conversion efficiency selectivity. Herein, heterovalent Fe(OH) 2 /Fe pair supported onto carbon nanotubes (Fe(OH) /Fe@CNTs) presented via electrochemical reconstruction CNTs‐supporting FeS/Fe C heterostructure. /Fe@CNTs exhibits high NH 3 yield rate 0.67 mmol h −1 cm −2 FE 95.1% at −0.4 V versus RHE, which mainly attributed regulated electronic structure cooperation iron sites. Meanwhile, adsorption nitrogen‐containing species adjusted * H enhanced. Moreover, balanced content Fe creates “buffering effect” maintain its activity stability. Theoretical calculations combined in situ FTIR Raman spectra reveal novel multiple reaction pathway on sites, entirely different from single or . Clearly, this study offers creative design advanced multivalent

Language: Английский

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Self-supported copper-cobalt oxide hybrid electrode for bifunctionally electrocatalytic nitrate reduction and methanol oxidation reactions

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137575 - 137575

Published: April 1, 2025

Language: Английский

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