Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 698, P. 138040 - 138040
Published: May 31, 2025
Language: Английский
Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(16), P. 8137 - 8181
Published: Jan. 1, 2024
Hydrogen peroxide (H
Language: Английский
Citations
27
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 5, 2025
Abstract Limited by the activity‐selectivity trade‐off relationship, electrochemical activation of small molecules (like O 2 , N 2, and CO ) rapidly diminishes Faradaic efficiencies with elevated current densities (particularly at ampere levels). Nevertheless, some catalysts can circumvent this restriction in a two‐electron oxygen reduction reaction (2e − ORR), sustainable pathway for activating to hydrogen peroxide (H ). Here we report 2e ORR expedited fluorine‐bridged copper metal–organic framework catalyst, arising from water spillover effect. Through operando spectroscopies, kinetic theoretical characterizations, it demonstrates that under neutral conditions, plays dual role accelerating dissociation stabilizing key * OOH intermediate. Benefiting spillover, catalyst expedite density range 0.1–2.0 A cm −2 both high (99–84.9%) H yield rates (63.17–1082.26 mg h −1 Further, feasibility present system has been demonstrated scaling up unit module cell 25 combination techno‐economics simulations showing production cost strongly dependent on densities, giving lowest price $0.50 kg 2.0 . This work is expected provide an additional dimension leverage systems independent oftraditional rules.
Language: Английский
Citations
3
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 14, 2025
Abstract Two‐electron oxygen reduction reaction (2e − ORR) in acidic media is a promising route for the decentralized and on‐site hydrogen peroxide (H 2 O ) generation. Nevertheless, strong interaction between active sites * OOH intermediates usually induces O─O bond cleavage to convert 2e pathway into sluggish 4e ORR. Therefore, it highly necessary optimize electronic structure of ORR electrocatalysts regulation adsorption energy. Herein, we propose utilization atomically dispersed Co/Mo anchored on mesoporous carbon hollow spheres (Co/Mo‐MCHS) via template‐engaged strategy selective H acid. Benefitting from electron‐donating effect Mo atoms, an enriched electron density around Co center Co/Mo‐MCHS observed, resulting optimal key approach apex volcano plot. Moreover, introduction species simultaneously suppresses electroreduction as‐obtained sites. As consequence, delivers high selectivity 90–95% The flow cell based catalyst achieves remarkable yield 2102 mg 150 h. this can be extended other early transition metal elements with similar modifier effects.
Language: Английский
Citations
3
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Oct. 25, 2024
Supramolecular polymers possess great potential in catalysis owing to their distinctive molecular recognition and dynamic crosslinking features. However, investigating supramolecular electrocatalysts with high efficiency oxygen reduction reaction hydrogen peroxide (ORHP) remains an unexplored frontier. Herein, we present organic for ORHP by introducing cyclodextrin-containing noncovalent building blocks, affording these supramolecules abundant bonds. The electronic states kinetics are further well-modulated via a host-guest strategy, resulting appropriate regional electron binding force controllable chemical activity. Notably, integrating units into phenyl group-containing model covalent polymer achieves production rate of 9.14 mol g
Language: Английский
Citations
18
Deleted Journal, Journal Year: 2024, Volume and Issue: 1(2), P. 181 - 206
Published: Aug. 4, 2024
Abstract Metal–organic frameworks (MOFs) have emerged as promising materials in the realm of electrocatalysis due to their high surface area, tunable porosity, and versatile chemical functionality. However, practical application has been hampered by inherent limitations such low electrical conductivity a limited number active metal sites. Researchers addressed these challenges through various strategies, including enhancing incorporating conductive nanoparticles, modifying structure composition MOFs replacing nodes functionalizing linkers, preparing catalysts thermal processes decarburization conversion into oxides, phosphides (MPs), sulfides (MSs). This review provided comprehensive summary strategies that were employed enhance electroactivity for improved electrocatalytic performance recent years. It also explored future directions potential innovations design synthesis MOF‐based electrocatalysts, offering valuable insights advancing sustainable energy technologies.
Language: Английский
Citations
11
Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 122715 - 122715
Published: Feb. 1, 2025
Language: Английский
Citations
2
ACS Nano, Journal Year: 2024, Volume and Issue: 19(1), P. 1600 - 1610
Published: Dec. 27, 2024
The development of high-performance bifunctional single-atom catalysts for use in applications, such as zinc–air batteries, is greatly impeded by mild oxygen reduction and evolution reactions (ORR OER). Herein, we report a electrocatalyst designed to overcome these limitations. catalyst consists well-dispersed low-nuclearity Co clusters adjacent single atoms over nitrogen-doped carbon matrix (CoSA+C/NC). precisely tailored asymmetric electronic structures are achieved with strong interactions between species. optimize the adsorption/desorption strength oxygenated intermediates on single-atomic sites endow exceptional activity under alkaline conditions half-wave potential (E1/2) 0.91 V an overpotential (η) 340 mV at 10 mA cm–2. In addition, battery assembled CoSA+C/NC achieves high power density 284.1 mW cm–2 long operational lifespan 400 h, superior those benchmark Pt/C + RuO2. Experimental findings theoretical analysis reveal that enhanced stems from synergistic sites. Consequently, overbinding *OH suppressed accelerated removal. This work establishes design principle advanced electrocatalysts multiphase metal species bearing interactions.
Language: Английский
Citations
8
ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21836 - 21854
Published: Aug. 7, 2024
Single metal atom catalysts (SACs) have garnered considerable attention as promising agents for catalyzing important industrial reactions, particularly the electrochemical synthesis of hydrogen peroxide (H
Language: Английский
Citations
7
Chemosphere, Journal Year: 2025, Volume and Issue: 373, P. 144159 - 144159
Published: Jan. 30, 2025
Language: Английский
Citations
1
Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown
Published: March 11, 2025
Abstract To advance electrochemical H 2 O production and unravel catalytic mechanisms, the precise structural coordination of single‐atomic M‐N‐C electrocatalysts is urgently required. Herein, Co─N 5 site with an asymmetric electronic configuration constructed to boost two‐electron oxygen reduction reaction (2e − ORR) compared symmetric 4 , effectively overcoming trade‐off between activity selectivity in production. Both experimental theoretical analyses demonstrate that breaking symmetry sites promotes activation molecules moderates adsorption key *OOH intermediate by disrupting linear scaling relationship for intermediates adsorption. This modulation enables efficient H₂O₂ its effective retention subsequent applications. As a proof concept, achieves rate as high 16.1 mol g cat −1 h flow cell, outperforming most recently reported counterparts. Furthermore, coupling 2e ORR oxidation cellulose‐derived carbohydrates accomplishes formic acid yields (84.1% from glucose 62.0%–92.1% other substrates), underpinning sustainable electro‐refinery biomass valorization at ambient conditions. By elucidating intrinsic 2e⁻ asymmetry sites, this work paves way high‐performance electrosynthesis.
Language: Английский
Citations
1