Single Atom Environmental Catalysis: Influence of Supports and Coordination Environments

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 27, 2023

Abstract Single‐atom catalysts (SACs) are desirable in environmental catalysis due to friendliness, structural stability, and maximum utilization of active metal sites. Extensive research has compared the catalytic performance between SACs with different single‐atom metals. However, their is also highly dependent on supports, which play an important role modulating local coordination environment SACs. Unfortunately, a comprehensive review that systematically discusses relationship supports environment, as well combined effects scare. In this review, three widely investigated applications including advanced oxidation processes (AOPs), mainly Fenton Fenton‐like reactions, nitrate reduction reaction (NO 3 RR) focused. By correlating characterization results, performances, computational environments reactivity examined detail, from origin pathways AOPs NO RR attempted reveal. Finally look forward for potential opportunities challenges on‐demand applications, provided.

Language: Английский

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Application, mechanism and prospects of Fe-based/ Fe-biochar catalysts in heterogenous ozonation process: A review

Chemosphere, Journal Year: 2023, Volume and Issue: 319, P. 138018 - 138018

Published: Jan. 30, 2023

Language: Английский

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A review on sustainable iron oxide nanoparticles: syntheses and applications in organic catalysis and environmental remediation

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(13), P. 7579 - 7655

Published: Jan. 1, 2024

In this review paper, recent developments of iron oxide nanoparticles are highlighted and discussed in the field organic catalysis environmental remediation.

Language: Английский

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Recent Progress and Perspectives on Transition Metal-Based Electrocatalysts for Efficient Nitrate Reduction

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 6701 - 6722

Published: April 8, 2024

Electrochemical nitrate reduction is the process of converting into ammonia or nitrogen using electric energy. This saves energy, protects environment, and an important technology for resource recovery water purification. paper examines recent advances in electrochemical research analyzes reaction mechanism path as well influence various factors on through thermodynamic kinetic principles. Second, catalytic performances transition metal electrocatalysts form single metals, alloys, oxides, composites are analyzed detail, which lays foundation rational development new, efficient, stable electrocatalysts. Finally, future directions prospects envisioned.

Language: Английский

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Accelerating proton coupled electron transfer by confined Cu-Ni bimetallic clusters for boosting electrochemical hydrodeoxygenation of nitrate

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125195 - 125195

Published: Feb. 1, 2025

Language: Английский

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MXene-based catalysts: A review

Materials Today Catalysis, Journal Year: 2024, Volume and Issue: 5, P. 100054 - 100054

Published: May 27, 2024

Two-dimensional (2D) materials, such as graphene, hexagonal boron nitride, 2D metal–organic frameworks, layered double hydroxides, transition metal dichalcogenides, and MXenes, have garnered significant attention in catalysis due to their exceptional properties structures. Notably, recent studies revealed the promising catalytic activity of MXene-based catalysts for many reactions, including hydrogen evolution, oxygen reduction, nitrogen carbon dioxide alcohol oxidation, hydrogenation, dehydrogenation, methanol conversion, dry reforming methane, CO oxidation. This review offers a summary advances field, contextualizing progress made. Additionally, it delves into existing challenges while presenting prospects future developments this domain.

Language: Английский

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Facile synthesis of coral-like nitrogen and sulfur co-doped carbon-encapsulated FeS2 for efficient electroreduction of nitrate to ammonia

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 348, P. 127813 - 127813

Published: May 4, 2024

Language: Английский

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Nitrate Reduction by NiFe-LDH/CeO₂: Understanding the Synergistic Effect between Dual-Metal Sites and Dual Adsorption

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(5), P. 2756 - 2765

Published: Jan. 22, 2024

Electrocatalytic nitrate reduction reaction (EC-NITRR) shows a significant advantage for green reuse of the (NO3–) pollutant. However, slow diffusion limits rate in practical EC-NITRR, causing an unsatisfactory ammonia (NH3) yield. In this work, multifunctional NiFe-LDH/CeO2 with dual adsorption effect (physisorption and chemisorption) dual-metal sites (Ce3+ Fe2+) was fabricated by electrodeposition method. performed expected ability enrichment NO3– through pseudo-first-order pseudo-second-order kinetic models, polymetallic structure provided abundant effective NO3–. At–0.6 V vs RHE, yield reached 335.3 μg h–1 cm–2 selectivity NH3 24.2 times that NO2–. The nitrogen source confirmed 15NO3– isotopic labeling. Therefore, work achieved recycling pollutant synergy catalysis, providing alternative approach recovery from wastewater.

Language: Английский

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In Situ Spectroscopic Probing of the Hydroxylamine Pathway of Electrocatalytic Nitrate Reduction on Iron‐Oxy‐Hydroxide

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Abstract Crystalline γ‐FeO(OH) dominantly possessing ─ OH terminals (𝛾‐FeO(OH) c ), polycrystalline containing multiple O, OH, and Fe pc α‐Fe 2 O 3 majorly surface are used as electrocatalysts to study the effect of on electrocatalytic nitrate reduction reaction (eNO RR) selectivity stabilization intermediates. Brunauer‐Emmett‐Teller analysis electrochemically determined area suggest a high active 117.79 m g −1 (ECSA: 0.211 cm ) for 𝛾‐FeO(OH) maximizing accessibility adsorption exhibiting selective eNO RR NH at pH 7 with yield rate 18.326 mg h −2 , >85% Faradaic efficiency (FE), least nine‐times catalyst‐recyclability. 15 N‐ D‐labeling combined in situ IR Raman studies validate ions generation nitrite hydroxyl amine A kinetic isotope (KIE) value 2.1 indicates H proton source proton‐coupled electron transfer rate‐limiting step. The rotating‐ring disk electrochemical (RRDE) subsequent Koutecký‐Levich reveal electron‐transfer constant (k) 2e‐ is 5.7 × 10 −6 s . This provides direct evidence formation dominant pathway γ‐FeO(OH).

Language: Английский

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Theoretical Insights into the Selectivity of Single-Atom Fe–N–C Catalysts for Electrochemical NO_x Reduction

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Single-atom Fe-N-C catalysts have attracted significant attention in the NOx reduction reaction (NOxRR). However, origin of their selectivity NOxRR remains unclear, impeding further advancements application. Herein, we investigate potential-driven competitive mechanism for NH3 and NH2OH production over single-atom pyridinic-FeN4 pyrrolic-FeN4 sites using constant-potential density functional theory calculations. The is linked to switching Fe 3d orbitals as they interact with intermediates. between determined by applied potentials. predominantly generates at higher potentials (-0.6 -1.2 V, vs SHE), while favored lower (0.6 -0.6 V). shows a similar potential-dependent product distribution, crossover potential -1.0 V. selectivity-determining intermediates (SDIs) are *NH2OH *NH2 + *OH. governed interacting SDIs, from dumbbell-shaped 3dz2 four-leaf clover-like 3dxz, 3dyz, 3dx2-y2, which plays crucial role controlling distribution based on These findings offer new insights into NOxRR.

Language: Английский

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