Electro-Fenton process for wastewater treatment: From selective H2O2 generation to efficient •OH conversion

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160709 - 160709

Published: Feb. 1, 2025

Language: Английский

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Metalloenzyme‐Inspired Cluster Fabrication within Mesoporous Channels Featuring Optimized Catalytic Microenvironments for Efficient Neutral pH H₂O₂ Electrosynthesis

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

Published: March 17, 2025

Abstract In nature, some metalloenzymes facilitate highly efficient catalytic transformations of small molecules, primarily attributed to the effective coupling between their metal cluster active sites and surrounding microenvironment. Inspired by this, a thermotropic redispersion strategy incorporate bismuth nanoclusters (Bi NCs) into mesoporous channels, mimicking metalloenzyme‐like catalysis enhance two‐electron oxygen reduction reaction (2e − ORR) for neutral pH H 2 O electrosynthesis, is developed. This model electrocatalyst exhibits exceptional 2e ORR performance with >95% selectivity across 0.2–0.6 V vs RHE in electrolyte. Notably, system produces up 7.2 wt% solution at an industrially relevant current density ≈320 mA cm −2 , 90% Faradaic efficiency over 120 h flow cell, demonstrating significant practical potential. Mechanistic insights reveal that introduction Bi NCs enhances adsorption *OOH intermediate, facilitating process. Moreover, channels carbon support create favorable microenvironment aeration local alkalinity, further boosting productivity. catalyst design mimics optimal integration site microenvironment, offering valuable rational nature‐inspired small‐molecule catalysts.

Language: Английский

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Regulating the Local Reaction Microenvironment at Chromium Metal–Organic Frameworks for Efficient H₂O₂ Electrosynthesis in Neutral Electrolytes

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

Published: March 30, 2025

Abstract The electrochemical synthesis of hydrogen peroxide represents a promising alternative to the traditional anthraquinone process, aiming for zero pollution. However, achieving efficient in neutral electrolytes is challenging due sluggish kinetics two‐electron oxygen reduction reaction. To address this issue, unique metal–organic framework (MOF) featuring Cr metal sites coordinated with tetrabromoterephthalic acid (Cr‐TBA) synthesized. This specially designed MOF exhibits distinctive paper‐clip‐like structure and remarkably enhanced Lewis acidity. Experimental results demonstrate that obtained can facilitate attraction OH − ions solution, promoting their accumulation on catalyst surface. enhancement leads excellent performances Cr‐TBA electrolytes, Faradaic efficiencies 96–98% production rate 13.4 mol g cat −1 h at current density 150 mA cm −2 . Operando spectroscopy functional theory calculations indicate modified microenvironment effectively facilitates conversion * OOH intermediates H 2 O

Language: Английский

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Atomic-Level Co/Mesoporous Carbon Nanofibers for Efficient Electrochemical H₂O₂ Production

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Structural effects on 2e− ORR electrocatalytic activity of LnFeO3 perovskites

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119113 - 119113

Published: April 1, 2025

Language: Английский

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Adjusting the active site of single Co atoms on CeO2 via cyano functional groups for selective H2O2 electrosynthesis at high yield

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: 374, P. 125398 - 125398

Published: April 21, 2025

Language: Английский

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In Situ Identification of Zinc Sites as Potential-Dependent Selectivity Switch over Dual-Atom Catalysts for H₂O₂ Electrosynthesis

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

Published: March 25, 2025

Controllably breaking the activity–selectivity trade-offs in electrocatalytic oxygen reduction reaction to produce H2O2 has long been a challenge renewable energy technologies. Herein, by assigning activity and selectivity requirements two independent single-atom sites, we deliberately engineered Co–Zn DAC for promising electrosynthesis, from which Co sites provided response reduction, Zn regulated toward 2e– pathway. Through multidimensional situ characterizations, potential-dependent switching function of was revealed, made increase production at various stages controllable. As result, efficient 11.1% single atom catalyst 94.8% realized, with prominent turnover frequency 2.7 s–1 among reported H2O2-producing catalysts. Notably, similar effect also observed M–Zn DACs (M = Pt, Ru, or Ni), demonstrated universal switcher role sites. The real-time catalytic site behavior insights gained through this integrated experimental theoretical study are envisioned be valuable not only ORR but other catalysis reactions involving trade-off issues.

Language: Английский

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Rational Design of Carbon‐Based Electrocatalysts for H₂O₂ Production by Machine Learning and Structural Engineering

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

Published: April 17, 2025

Abstract Electrochemical synthesis of hydrogen peroxide (H 2 O ) via two‐electron oxygen reduction reaction (2e − ORR) represents an economically viable alternative to conventional anthraquinone processes. While noble metal catalysts have dominated this field, carbon‐based materials are emerging as promising alternatives due their low cost, abundant reserves, and tunable properties. This mini‐review summarizes recent advances in computational methods, particularly the integration density functional theory (DFT) with machine learning (ML), accelerate rational design electrocatalysts by enabling rapid screening structure‐training predictions. Meanwhile, optimization strategies systematically investigated, focusing on four key aspects: atomic‐level heterochromatic doping, defect engineering, microenvironment control, morphological design. Despite significant progress achieving high selectivity activity, challenges remain scaling these for industrial applications. Moving H will require multidisciplinary efforts combining advanced situ characterization techniques, modeling, process engineering develop robust suitable diverse operating conditions.

Language: Английский

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Achievements and Challenges in Carbon‐Free Dual‐Atom Catalysts for Electrocatalysis

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

Published: April 25, 2025

Abstract Carbon‐free dual‐atom catalysts (CFDACs) are beginning to make their presence in the field of electrocatalysis due unique properties and structures that different from those carbon‐based DACs, which endowed with activity, selectivity, stability. Currently, some advances made study CFDACs, including structure‐performance relationships metal‐support interaction, theoretical combined experiments, electrocatalytic applications potential catalytic mechanisms, design strategies achieve highly active performance. Herein, perception CFDACs is first elaborated terms carbon‐free substrates sites, then briefly summarizes advanced characterization techniques, study, energy storage conversion applications, highlights realize high‐performance vacancy anchoring, strain regulation, alloying, finally put forward personal viewpoints on current challenges future development CFDACs.

Language: Английский

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