Synthesis, characterization, X-ray crystal structures and antibacterial properties of cobaloximes with aniline based ligands containing acid functionality

Boopalan, S.; Antony, A. Jerold; Loyid, Nienu Susan; Vijaikanth, Vijendran; Sevanan, Murugan

doi:10.1080/24701556.2021.2025076

Cited by 1 publication

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“…The 3400−3500 cm −1 peak is due to O−H•••O stretching. 50 In the nanocomposite, all of the characteristic peaks present in both pure g-C 3 N 4 and chlorocobaloximes appeared, but there was a slight shift in the position of the peaks. These shifts in the characteristic peaks indicate the formation of nanocomposites.…”

Section: Resultsmentioning

confidence: 91%

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g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

Sowmya,

Vijaikanth

2023

ACS Omega

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Due to environmental contamination and the depletion of energy supplies, it is very important to develop low-cost, high-performance, multifunctional electrocatalysts for energy conversion and storage systems. Herein, we report the development of cost-effective modified electrodes containing g-C 3 N 4 /chlorocobaloxime composites (C1–C4) and their electrocatalytic behavior toward the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), followed by their energy-storage applications. A series of chlorocobaloximes {ClCo(dpgH) 2 B} with diphenylglyoxime (dpgH) and neutral bases (B) containing a carboxylic acid moiety (isonicotinic acid, pyridine-3,5-dicarboxylic acid, indole-2-carboxylic acid, and p-aminobenzoic acid) have been synthesized and characterized by spectroscopic techniques. The nanocomposites of g-C 3 N 4 /chlorocobaloximes are prepared and characterized by Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy (UV-DRS), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray photoelectron spectroscopy (XPS), particle size distribution analysis (PSA), Brunauer–Emmett–Teller (BET), and energy dispersive X-ray analysis (EDAX) techniques. The composite coatings exhibit enhanced HER performance at lower overpotential and with a lower Tafel slope. When the water-splitting reactions are studied using 0.5 M H 2 SO 4 and 0.5 M KOH as electrolytic solutions, the composite g-C 3 N 4 /C2 containing pyridine-3,5-dicarboxylic acid as a neutral base shows excellent HER activity with a lower overpotential of 173 mV at −10 mA cm –2 and OER activity with a lower overpotential of 303 mV. The HER reaction takes place through the Volmer–Heyrovský mechanism, where the desorption step is the rate-determining step. Among the synthesized nanocomposites, the nanocomposite g-C 3 N 4 /C2 shows higher efficiency toward both HER and OER reactions, with a lower Tafel slope of 55 mV dec –1 for HER and 114 mV dec –1 for OER than the other nanocomposites. The overall water-splitting studies of the composite g-C 3 N 4 /C2 in 0.5 M KOH indicate that the evolution of hydrogen and oxygen occurs constantly up to 120 h. The supercapacitance applications studied using cyclic voltammetry and charge–discharge studies indicate that the nanocomposite g-C 3 N 4 /C1 shows a good specific capacitance of 236 F g –1 at 0.5 A g –1 compared to others. The increased electrochemical performance of the synthesized nanocomposites is due to the incorporati...

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Section: Resultsmentioning

confidence: 91%

“…The presence of the CO group is confirmed by the appearance of a peak at around 1700 cm –1 for all of the complexes. The 3400–3500 cm –1 peak is due to O–H···O stretching …”

Section: Resultsmentioning

confidence: 99%

g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

Sowmya,

Vijaikanth

2023

ACS Omega

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Synthesis, characterization, X-ray crystal structures and antibacterial properties of cobaloximes with aniline based ligands containing acid functionality

Cited by 1 publication

References 75 publications

g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

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Synthesis, characterization, X-ray crystal structures and antibacterial properties of cobaloximes with aniline based ligands containing acid functionality

Cited by 1 publication

References 75 publications

g-C3N4/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

g-C3N4/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

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Product

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g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage

g-C₃N₄/Chlorocobaloxime Nanocomposites as Multifunctional Electrocatalysts for Water Splitting and Energy Storage