Electrodeposition, Characterization, and Corrosion Behavior of CoCrFeMnNi High-Entropy Alloy Thin Films

Popescu, Ana-Maria Julieta; Brânzoi, Florina; Constantin, Ionuţ; Anastasescu, Mihai; Mitrică, Dumitru; Anasiei, Ioana; Olaru, Mihai Tudor

doi:10.3390/coatings11111367

Cited by 30 publications

(16 citation statements)

References 30 publications

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“…HEAs present a broad application prospect in the field of electrocatalysis, primarily because of their adjustable composition and a high tolerance for defects and disorder. 101−103 HEA nanoparticles fabricated following traditional methods (such as hydro/solvothermal, 104 calcination, 105 electrodeposition, 106 and template-assisted 107 methods) present uneven particle composition and varying sizes and morphologies. The size and morphology of the materials vary on the basis of the type of fabrication method followed.…”

Section: High-entropy Alloys (Heas)mentioning

confidence: 99%

“…HEA nanoparticles fabricated following traditional methods (such as hydro/solvothermal, calcination, electrodeposition, and template-assisted methods) present uneven particle composition and varying sizes and morphologies. The size and morphology of the materials vary on the basis of the type of fabrication method followed.…”

Section: Design Strategies For Pt-based Alloysmentioning

confidence: 99%

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Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Gao,

Zhu,

Chen

et al. 2023

ACS Nano

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The splitting of water through electrocatalysis offers a sustainable method for the production of hydrogen. In alkaline electrolytes, the lack of protons forces water dissociation to occur before the hydrogen evolution reaction (HER). While pure Pt is the gold standard electrocatalyst in acidic electrolytes, since the 5d orbital in Pt is nearly fully occupied, when it overlaps with the molecular orbital of water, it generates a Pauli repulsion. As a result, the formation of a Pt−H* bond in an alkaline environment is difficult, which slows the HER and negates the benefits of using a pure Pt catalyst. To overcome this limitation, Pt can be alloyed with transition metals, such as Fe, Co, and Ni. This approach has the potential not only to enhance the performance but also to increase the Pt dispersion and decrease its usage, thus overall improving the catalyst's costeffectiveness. The excellent water adsorption and dissociation ability of transition metals contributes to the generation of a proton-rich local environment near the Pt-based alloy that promotes HER. Significant progress has been achieved in comprehending the alkaline HER mechanism through the manipulation of the structure and composition of electrocatalysts based on the Pt alloy. The objective of this review is to analyze and condense the latest developments in the production of Pt-based alloy electrocatalysts for alkaline HER. It focuses on the modified performance of Pt-based alloys and clarifies the design principles and catalytic mechanism of the catalysts from both an experimental and theoretical perspective. This review also highlights some of the difficulties encountered during the HER and the opportunities for increasing the HER performance. Finally, guidance for the development of more efficient Pt-based alloy electrocatalysts is provided.

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Section: High-entropy Alloys (Heas)mentioning

confidence: 99%

Section: Design Strategies For Pt-based Alloysmentioning

confidence: 99%

Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Gao,

Zhu,

Chen

et al. 2023

ACS Nano

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“…Potentiostatic electrodeposition was carried out in organic media to obtain CoCrFeMnNi HEA. A more homogeneous coating with better corrosion resistance was obtained at −2.1 V as compared to −2.5 V [16]. Yoosefan et al [6] deposited CoCrFeMnNi by electrodeposition at various potentials (4, 5 and 6 V) and the optimization showed morphological and chemical homogeneity at 5 V with lowest corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Phase composition, surface chemistry and electrochemical studies of electrodeposited AlMnFeCuNi high entropy alloy composite coatings incorporated with carbon nanotubes

Mohan,

Pandel,

Kumar

2024

Mater. Res. Express

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AlMnFeCuNi high entropy alloy (HEA) coatings were electrodeposited onto mild steel substrate with and without incorporation of carbon nano tubes (CNT). This paper focused on the morphology, hardness, wear and corrosion behaviour for as deposited HEA and HEA-CNT coatings. Both the coatings constituted simple solid solution with face-centered cubic (FCC) structure. The addition of carbon nano tubes in the HEA coatings as revealed by scanning electron microscopy showed more smaller granules and compact morphology with least coating thickness value (5 ± 0.35 μm). Enhanced Anti-wear performance results in higher hardness and lower coefficient of friction. The presence of CNTs resulted improvised corrosion resistant properties in 3.5% NaCl corrosive media. The formation of more protective oxides such as Alox+3, Mnox+2 and Feox+3 on passive oxide layer in HEA-CNT coatings acted as a barrier, protected it from corrosion.

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“…In order to develop new materials with special properties that are suitable for marine engineering [ 9 ], it is necessary to identify the optimal compositions of high-entropy alloys. The constituent elements have a major impact on a material’s properties, which should meet the requirements of society by reducing material and energy consumption [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Non-Aqueous Electrodeposition and Characterization of AlCrCuFeNi High Entropy Alloy Thin Films

et al. 2022

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Materials used in the marine industry are exposed to extreme conditions, so it is necessary to meet remarkable characteristics, such as mechanical resistance, low density, and good corrosion resistance. The challenging environment requires continuous performance improvements, so this work is focused on developing new materials with superior properties, using the electrochemical deposition technique, which are convenient for marine engineering. High-entropy alloys have been attracting tremendous interest in many applications, due to their simple crystal structures and advantageous physical-chemical properties, such as high strength, anti-corrosion, erosion, and electro-magnetic capabilities. To identify the most appropriate compositions, MatCalc software was used to predict the structure and characteristics of the required materials, and thermodynamic and kinetic criteria calculations were performed. The modelling processes generated a series of optimal compositions in the AlCrCuFeNi alloy system, that are suitable to be used in anticorrosive and tribological applications. The composition and morphology of the obtained high entropy alloy thin films revealed a uniform structure, with a small grain profile. The corrosion resistance was investigated in artificial seawater to observe the behavior of the newly developed materials in demanding conditions, and the results showed improved results compared to the copper foil substrate.

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Electrodeposition, Characterization, and Corrosion Behavior of CoCrFeMnNi High-Entropy Alloy Thin Films

Cited by 30 publications

References 30 publications

Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review

Phase composition, surface chemistry and electrochemical studies of electrodeposited AlMnFeCuNi high entropy alloy composite coatings incorporated with carbon nanotubes

Non-Aqueous Electrodeposition and Characterization of AlCrCuFeNi High Entropy Alloy Thin Films

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