Effect of NH4Cl on the microstructure, wettability and corrosion behavior of electrodeposited Ni–Zn coatings with hierarchical nano/microstructure

Soleimangoli, F.; Hosseini, Seyed Alireza; Davoodi, Ali; Mokhtari, Abdelrhani; Alishahi, Mostafa

doi:10.1016/j.surfcoat.2020.125825

Cited by 32 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The presence of the capping agent NH 4 Cl during sample synthesis supports the formation of nanocone structures. 27,30,40,48 This aspect is also exemplified by the AFM scan visualizations in Figure 2A with increasing concentrations of c NH4Cl = 0 (sample 1), 20 (sample 2), and 40 (sample 3) g/L and reflected in the increase in the average surface roughness S a of the samples in Figure 2B. Due to the effect of the Lorentz force and the magnetic gradient force, the action of which is caused by the ferromagnetic Ni deposit, magneto-hydrodynamic flows occur, which stimulate the mass transport to the electrode.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability

Krause

Skibińska

Rox

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Emerging manufacturing technologies make it possible to design the morphology of electrocatalysts on the nanoscale in order to improve their efficiency in electrolysis processes. The current work investigates the effects of electrodeattached hydrogen bubbles on the performance of electrodes depending on their surface morphology and wettability. Ni-based electrocatalysts with hydrophilic and hydrophobic nanostructures are manufactured by electrodeposition, and their surface properties are characterized. Despite a considerably larger electrochemically active surface area, electrochemical analysis reveals that the samples with more pronounced hydrophobic properties perform worse at industrially relevant current densities. High-speed imaging shows significantly larger bubble detachment radii with higher hydrophobicity, meaning that the electrode surface area that is blocked by gas is larger than the area gained by nanostructuring. Furthermore, a slight tendency toward bubble size reduction of 7.5% with an increase in the current density is observed in 1 M KOH.

show abstract

Section: Resultsmentioning

confidence: 99%

Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability

Krause

Skibińska

Rox

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…To prepare the electrodeposition bath, 10 mM HCl, 300 mM H 3 BO 3 , and 500 mM NH 4 Cl were dissolved in deionized water (18.2 MΩ). The H 3 BO 3 acted as a buffer to maintain the electrolyte pH, 49 and NH 4 Cl was used to obtain the rough morphology of the catalyst 50 . To optimize the molar concentrations of H 3 BO 3 and NH 4 Cl, the HER activity was measured by adjusting the molar ratio of 100, 300, and 500 mM for both additives, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The H 3 BO 3 acted as a buffer to maintain the electrolyte pH, 49 and NH 4 Cl was used to obtain the rough morphology of the catalyst. 50 To optimize the molar concentrations of H 3 BO 3 and NH 4 Cl, the HER activity was measured by adjusting the molar ratio of 100, 300, and 500 mM for both additives, respectively. When the molar ratio of H 3 BO 3 and NH 4 Cl was 300 and 500 mM, the best catalytic activity was exhibited (Figure S1).…”

Section: Catalyst Fabricationmentioning

confidence: 99%

Restructured Co‐Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers

Lee

Park

Kim

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary The design of robust and high‐performance hydrogen evolution reaction (HER) catalysts is crucial for the scalable production of hydrogen by electrochemical water splitting. In this work, we fabricated hierarchically porous Co‐Ru catalysts with excellent catalytic activity and durability in acidic media. The morphology of the Co‐Ru catalysts was successfully controlled through an optimized electrochemical process. Among all Co‐Ru samples prepared in this study, the Co72Ru28 catalyst exhibited the largest catalytic surface area, as well as excellent HER activity (overpotential of 26.4 mV at −10 mA cm−2) and durability. X‐ray photoelectron spectroscopy measurements revealed the electron transfer between Co and Ru, indicating that the formation of the Co‐Ru alloy improved the activity and durability of the catalyst. Furthermore, a proton exchange membrane water electrolyzer (PEMWE) prepared with the Co72Ru28 sample showed excellent performances (3.4 A cm−2 at 2.0 Vcell), illustrating the promising potential of the present Co‐Ru catalysts as cathode materials for PEMWE systems.

show abstract

“…These are crystal modifiers that benefit superhydrophobicity. Soleimangoli et al [40] prepared a Ni-Zn superhydrophobic coating by two-steps electrodeposition process, added ammonium chloride modifier to a bath composed of nickel chloride, zinc chloride, and boric acid, respectively. The coating surface becomes polyhedral after the addition of ammonium chloride, which changes from polyhedral-shape structure to micro-nano conical structure.…”

Section: Modification Of Crystalsmentioning

confidence: 99%

Superhydrophobic Coating Fabrication for Metal Protection Based on Electrodeposition Application: A Review

Miller¹,

Hu²,

Weamie³

et al. 2021

MSCE

View full text Add to dashboard Cite

In recent years, superhydrophobic media has attracted tremendous attention due to its industrial applicability value, especially in anti-corrosion performance. The superhydrophobic coating, which has a robust and water-repellent capacity, can catch the air to form several "airbags" on the substrate's surface, isolating the corrosion media. Various superhydrophobic coating preparation technologies have been suggested, but each has its own set of flaws. On the other hand, electrodeposition, as a relatively mature industrial processing application, offers distinct advantages. However, until now, there have been few reviews on the electrodeposition preparation of anticorrosive superhydrophobic coatings. Therefore, the author has described several fabrication techniques based on superhydrophobic coatings in this review, including the advantages and disadvantages. Superhydrophobic coatings conventional concepts and wettability, as well as the model wetting concepts, have been reviewed. The coating processing status and the corrosion-resistant potential through the electrodeposition of metal and comparable composite are detailly encapsulated. Furthermore, electrodeposition parameters, including current density, crystal modifiers, and a deposition time of the coating morphology, are reported, following the ultrasonic-assisted, jet, pulse, and magnetic field-induced electrodeposition, respectively, as the recently developed technologies for preparing a coating. Finally, technology limitation is shown as well as the obstacles and prospects, and the improvement of the superhydrophobic coating's durability as a prospects research focus has been recommended.

show abstract

Effect of NH4Cl on the microstructure, wettability and corrosion behavior of electrodeposited Ni–Zn coatings with hierarchical nano/microstructure

Cited by 32 publications

References 33 publications

Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability

Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability

Restructured Co‐Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers

Superhydrophobic Coating Fabrication for Metal Protection Based on Electrodeposition Application: A Review

Contact Info

Product

Resources

About