Published: Jan. 1, 2024
Language: Английский
Published: Jan. 1, 2024
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)
Published: June 25, 2024
Abstract The electrochemical production of hydrogen peroxide (H 2 O ) using metal‐free catalysts has emerged as a viable and sustainable alternative to the conventional anthraquinone process. However, precise architectural design these electrocatalysts poses significant challenge, requiring intricate structural engineering optimize electron transfer during oxygen reduction reaction (ORR). Herein, we introduce novel covalent organic frameworks (COFs) that effectively shift ORR from four‐electron more advantageous two‐electron pathway. Notably, JUC‐660 COF, with strategically charge‐modified benzyl moieties, achieved continuous high H yield over 1200 mmol g −1 h for an impressive duration 85 hours in flow cell setting, marking it one most efficient non‐pyrolyzed reported date. Theoretical computations alongside situ infrared spectroscopy indicate markedly diminishes adsorption OOH* intermediate, thereby steering towards desired Furthermore, versatility was demonstrated through its application electro‐Fenton reaction, where efficiently rapidly removed aqueous contaminants. This work delineates pioneering approach altering pathway, ultimately paving way development highly effective electrocatalysts.
Language: Английский
Citations
11Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152860 - 152860
Published: June 5, 2024
Language: Английский
Citations
10Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156430 - 156430
Published: Oct. 1, 2024
Language: Английский
Citations
10International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 82, P. 724 - 732
Published: Aug. 3, 2024
Language: Английский
Citations
8Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 673, P. 453 - 462
Published: June 13, 2024
Language: Английский
Citations
6Energies, Journal Year: 2024, Volume and Issue: 17(22), P. 5712 - 5712
Published: Nov. 15, 2024
With the increasing global emphasis on green energy and sustainable development goals, electrocatalytic oxygen evolution reaction (OER) is gradually becoming a crucial focus in research water oxidation for hydrogen generation. However, its complicated processes associated with high barrier severely limit efficiency of conversion. Recently, layered double hydroxide (LDH) has been considered as one most promising catalysts alkaline media. Nonetheless, lacking deep insight into kinetic process OER detrimental to further optimization LDH catalysts. Therefore, monitoring catalytic via surface-sensitive situ spectroscopy especially important. In particular, Raman technique capable providing fingerprint information surface species intermediates operating environment. From perspective spectroscopy, this paper provides an exhaustive overview progress characterization mechanism catalysts, theoretical guidance designing materials. Finally, we present incisive discussion challenges future trend.
Language: Английский
Citations
5Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 52, P. 104902 - 104902
Published: Aug. 6, 2024
Language: Английский
Citations
4ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(1)
Published: Jan. 1, 2025
Abstract Finding noble‐metal‐free hydrogen evolution reaction (HER) catalysts with facile synthesis and efficient performance is essential to carry out electrochemical overall water splitting for energy development. An ultrafast electrodeposition technique the of NiFe developed. The rapid nanoparticle film morphology was achieved by uniformly anchoring particles onto three‐dimensional nickel foam (NF) via one‐step constant‐current in 30 s. catalyst exhibited excellent HER electrocatalytic activity stability 1.0 M KOH solution. To attain a current density 10 mA·cm −2 , displayed favorable kinetics an overpotential 168 mV Tafel slope 168.5 mV·dec −1 . Continuous tests NiFe/NF electrode were conducted up 23 h at 10·mA·cm decrease merely 2 mV, exhibiting outstanding durability.
Language: Английский
Citations
0Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 13, 2025
Electrochemical water splitting is a promising method for the generation of "green hydrogen", renewable and sustainable energy source. However, complex, multistep synthesis processes, often involving hazardous or expensive chemicals, limit its broader adoption. Herein, nitrate (NO3-) anion-intercalated nickel-iron-cerium mixed-metal (oxy)hydroxide heterostructure electrocatalyst fabricated on nickel foam (NiFeCeOxHy@NF) via simple electrodeposition followed by cyclic voltammetry activation to enhance surface properties. The NiFeCeOxHy@NF exhibited low overpotential 72 186 mV at 10 mA cm-2 hydrogen evolution reaction (HER) oxygen (OER), respectively, in 1.0 M KOH. In two-electrode system, obtained voltage 1.47 V KOH with robust stability. Results revealed that notable activity catalyst primarily due (i) hierarchical nanosheet morphology, which provides large area abundant active sites; (ii) NO3- anion intercalation enhances electrode stability eliminates need binders while simultaneously promoting strong catalyst-substrate adhesion, resulting decreased resistance accelerated kinetics; (iii) unique superhydrophilic properties facilitate electrolyte penetration through capillary action minimize gas bubble formation reducing interfacial tension.
Language: Английский
Citations
0Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: 981, P. 118958 - 118958
Published: Jan. 26, 2025
Language: Английский
Citations
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