Electrodeposition of Ni nanoparticles from deep eutectic solvent and aqueous solution promoting high stability electrocatalyst for hydrogen and oxygen evolution reactions

Electrodeposition of Ni nanoparticles from deep eutectic solvent and aqueous solution promoting high stability electrocatalyst for hydrogen and oxygen evolution reactions

Nanostructured Ni films were synthesized from two distinct baths and were assessed as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1 M KOH. Herein, Ni was electrodeposited from two separate solvents, the aqueous acetate buffer and ethaline solvent as...

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Bibliographic Details
Published in:Journal of solid state electrochemistry Vol. 26; no. 6-7; pp. 1501 - 1517
Main Authors: Elsharkawya, Safya, Hammad, Sherin, El-hallaga, Ibrahim
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-07-2022
Springer Nature B.V
Subjects:
Analytical Chemistry
Aqueous solutions
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Current density
Electrocatalysts
Electrochemistry
Electrodeposition
Electron microscopy
Energy Storage
Hydrogen evolution reactions
Microscopy
Nanoparticles
Original Paper
Oxygen evolution reactions
Physical Chemistry
Solvents
Ni electrodeposition
Hydrogen evolution reaction
Oxygen evolution reaction
Deep eutectic solvents
Acetate bath
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Summary:Nanostructured Ni films were synthesized from two distinct baths and were assessed as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1 M KOH. Herein, Ni was electrodeposited from two separate solvents, the aqueous acetate buffer and ethaline solvent as a kind of deep eutectic solvents (DESs), and both the deposited films were investigated as electrocatalysts for HER and OER. The electrodeposition parameters such as pH and deposition potential were studied. The electrodeposition process was performed using chronoamperometry technique and Ni deposits were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). Fabricated Ni@PGE deposit from ethaline only requires an overpotential of − 154 mV and 350 mV to achieve a current density of 10 mA cm −2 for HER and OER, respectively. While, Ni@PGE from acetate requires an overpotential of − 164 mV and 400 mV to produce the current density of 10 mA cm −2 for HER and OER. Graphical abstract
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-022-05177-z