Опубликована: Янв. 1, 2024
Язык: Английский
Rare Metals, Год журнала: 2025, Номер unknown
Опубликована: Фев. 11, 2025
Язык: Английский
Процитировано
0
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160938 - 160938
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
Nanoscale, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
The intrinsically sluggish kinetics of the oxygen evolution reaction (OER) at anode poses a formidable challenge to industrial application water electrolysis, although NiFe-based oxides and hydroxides have emerged as promising anodic candidates. Within this framework, we report synthesis Nb-doped NiFe-layered double (Nb/NiFe-LDH) via straightforward one-step hydrothermal approach. Notably, Nb doping maintained structural integrity NiFe-LDH framework it enhanced valence state active Ni species during electrochemical activation process, which accelerated concomitant reconstruction LDH phase. As result, Nb/NiFe-LDH demonstrated remarkable overpotential 198 mV attain current density 10 mA cm-2 in an alkaline electrolyte. This work proposes novel strategy for enhancing performance OER electrocatalysts.
Язык: Английский
Процитировано
0
Rare Metals, Год журнала: 2025, Номер unknown
Опубликована: Апрель 3, 2025
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Апрель 5, 2025
The development of highly efficient oxygen evolution reaction (OER) electrocatalysts is pivotal to enhance the performance alkaline water electrolyzers. Herein, a facile two-step electrodeposition method developed for fabrication nitrogen-doped carbon (NC) and manganese-incorporated NiFe layered double hydroxides (LDHs) supported on Ni foam (NF). When evaluated in 1.0 M KOH solution, optimized material NC20-Mn-NiFe LDH showed excellent OER requiring low overpotentials 298 331 mV achieve high current densities 500 1000 mA cm-2, respectively, no loss density was observed at fixed potentials 1.53 1.57 V 125 h each case. This not only better than that state-of-the-art RuO2/NF but also most recently reported LDH-based catalysts. Such remarkable mainly attributed vertical growth sheets NF, facilitated electron transfer charge modulation active metal sites due electron-withdrawing electron-donating effects NC Mn, resulting shift rate-determining step from OOH* formation O2 desorption with decreased free energy. research work provides further insights into modulating structure materials delivering industrial-level overpotentials.
Язык: Английский
Процитировано
0
ACS Nano, Год журнала: 2025, Номер unknown
Опубликована: Апрель 29, 2025
Selective four-electron mild electrochemical oxidation of benzyl alcohol to high-value-added benzoic acid is regarded as a green alternative conventional synthesis methods under moderate conditions. Herein, we synthesize oxygen vacancy-rich amorphous/crystalline heterostructure spinel-type oxides NiCo2O4 bifunctional electrocatalyst by pulse voltammetry treatment process, which can be utilized for the anode (AOR) and cathode nitrate reduction reaction (NO3RR), respectively. The designed NiCo2O4-x-25/NF delivers only 1.18 V vs RHE at 10 mA cm-2, Faraday efficiency ∼100%. systematic studies reveal that amorphous structure generates abundant vacancies, promoting rapid generation active sites intermediate species adsorption. Meanwhile, presence crystalline accelerates electron transfer maintains structural stability, thereby improving overall performance. Impressively, it exhibits excellent electrocatalytic performance AOR coupled with NO3RR in an integrated electrolyzer, achieving current density 100 cm-2 applied low cell voltage 1.38 maintaining superior catalytic withstanding continuous electrolysis 144 h. This work provides facile approach high performance, holding great potential paired electrosynthesis value-added chemicals.
Язык: Английский
Процитировано
0
Journal of Alloys and Compounds, Год журнала: 2024, Номер 1004, С. 175860 - 175860
Опубликована: Авг. 4, 2024
Язык: Английский
Процитировано
3
Journal of Materials Chemistry A, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
The uniform cation and anion defects on Ni 6 Fe 2 Al-LDH shorten the interatomic M–M distance trigger oxide path mechanism of oxygen evolution reaction.
Язык: Английский
Процитировано
2
International Journal of Hydrogen Energy, Год журнала: 2024, Номер 97, С. 798 - 812
Опубликована: Дек. 4, 2024
Язык: Английский
Процитировано
2
Angewandte Chemie, Год журнала: 2024, Номер 136(37)
Опубликована: Июнь 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.
Язык: Английский
Процитировано
1