Mechanism of nickel-molybdenum alloy electrodeposition in citrate electrolytes

Chassaing, E.; Quang, K. Vu; Wiart, R.

doi:10.1007/bf01007931

Cited by 158 publications

(79 citation statements)

References 8 publications

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“…The production of H 2 (g) is consistent with a previously proposed deposition mechanism in which evolved H 2 (g) reduces the intermediate NiMo mixed oxide to a neutral alloy [eqn (7) to (10)]. 31 …”

Section: A Deposition Of the Electrocatalystssupporting

confidence: 87%

Evaluation of Pt, Ni, and Ni–Mo electrocatalysts for hydrogen evolution on crystalline Si electrodes

McKone

Warren

Bierman

et al. 2011

Energy Environ. Sci.

463

382

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The dark electrocatalytic and light photocathodic hydrogen evolution properties of Ni, Ni-Mo alloys, and Pt on Si electrodes have been measured, to assess the viability of earth-abundant electrocatalysts for integrated, semiconductor coupled fuel formation. In the dark, the activities of these catalysts deposited on degenerately doped p + -Si electrodes increased in the order Ni < Ni-Mo # Pt. Ni-Mo deposited on degenerately doped Si microwires exhibited activity that was very similar to that of Pt deposited by metal evaporation on planar Si electrodes. Under 100 mW cm À2 of Air Mass 1.5 solar simulation, the energy conversion efficiencies of p-type Si/catalyst photoelectrodes ranged from 0.2-1%, and increased in the order Ni z Ni-Mo < Pt, due to somewhat lower photovoltages and photocurrents for p-Si/Ni-Mo relative to p-Si/Ni and p-Si/Pt photoelectrodes. Deposition of the catalysts onto microwire arrays resulted in higher apparent catalytic activities and similar photoelectrode efficiencies than were observed on planar p-Si photocathodes, despite lower light absorption by p-Si in the microwire structures.

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Section: A Deposition Of the Electrocatalystssupporting

confidence: 87%

Evaluation of Pt, Ni, and Ni–Mo electrocatalysts for hydrogen evolution on crystalline Si electrodes

McKone

Warren

Bierman

et al. 2011

Energy Environ. Sci.

463

382

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“…For the platings deposited at 1 and 2 mA cm −2 , changes were not observed even after Ar-ion etching; however, Mo (0) was observed for plating at 5 and 10 mA cm −2 after Ar-ion etching, indicating that a relatively high current density is required to reduce Mo, which is necessary for co-deposition to occur. The low generation rate of atomic hydrogen at the substrate surface may be responsible for this phenomenon since Mo is proposed to be reduced by the generation of atomic hydrogen in previous studies [27,28]. Similar results have been reported for electroplating in a Ni-Mo system [27].…”

Section: Effect Of Current Density On Zn-fe-mo Platingssupporting

confidence: 77%

“…The low generation rate of atomic hydrogen at the substrate surface may be responsible for this phenomenon since Mo is proposed to be reduced by the generation of atomic hydrogen in previous studies [27,28]. Similar results have been reported for electroplating in a Ni-Mo system [27]. 8 of 13 Figure 9 shows the relationship between the current density and current efficiency.…”

Section: Effect Of Current Density On Zn-fe-mo Platingssupporting

confidence: 73%

“…The content of Mo in the plating decreased with increasing current density, possibly corresponding to a high deposition rate of the plating and an insufficient feed rate of the Mo ions. The extremely high deposition rate must have led to the depleted Mo layer near the substrate surface, thereby leading to the slow reduction of Mo [27]. In addition, the composition of From the results obtained from the cathodic polarization curves, current densities of 1, 2, 5, and 10 mA cm −2 were selected.…”

Section: Effect Of Current Density On Zn-fe-mo Platingsmentioning

confidence: 99%

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Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating

et al. 2017

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Zn-Ni plating is indispensable in various industries because of its high corrosion resistance. However, Ni has been reported to trigger allergies; thus, an alternative Ni-free plating is desired. Zn-Fe plating is considered to be a promising candidate, albeit its corrosion resistance still needs to be improved. The corrosion resistance of Zn-Fe plating is expected to increase by the addition of Mo as the third alloying element as it is more noble than Zn and Fe. In this study, Zn-Fe-Mo plating with a corrosion resistance nearly equivalent to that of the Zn-Ni plating was fabricated. Zn-Fe-Mo plating was electrically deposited from continuously-agitated plating baths prepared by mixing ZnSO 4 , FeSO 4 , Na 2 MoO 4 , Na 3 C 6 H 5 O 7 , and Na 2 SO 4 using Fe or Ni plates as the substrate. The surface morphology, composition, crystal phase, and electronic state of Mo of the platings were investigated by scanning electron microscopy equipped with energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The anti-corrosion performance was evaluated by Tafel extrapolation method. Formation of plating comprising a Mo containing alloy phase was found to be crucial for improving corrosion resistance. The Zn-Fe-Mo plating demonstrates promise for replacing anti-corrosion Zn-Ni platings.

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“…[25] The studies of the mechanism of Mo deposition with the Ni from the citrate electrolytes have led to the hypothesis of adsorption and reduction of molybdate ion species. [26][27][28][29] Bearing in mind these considerations, different preparation conditions lead to considerable difference in structure, morphology, and composition of deposited powders, which can affect their magnetic and electrocatalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Co-Ni-MoxOy Powders: Part I. The Influence of Deposition Conditions on Powder Composition and Morphology

Stevanović

Stajić-Trošić

Ćosović

et al. 2009

Metall Mater Trans B

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The Co-Ni-Mo x O y powders were obtained electrochemically at a constant current density from ammonia electrolyte. Ni and Co were anomalously deposited, inducing Mo deposition, which cannot be deposited separately from aqueous solutions. The obtained Co-Ni-Mo x O y powders were investigated by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and scanning electon microscope (SEM) methods. Based on the obtained experimental results, it was concluded that the particle size of deposited powders is influenced by the chemical composition of the electrolyte and current density imposed. XRD results suggested that obtained powders were of amorphous structure, although a Co 3 Mo compound can be formed if certain experimental conditions are applied.

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Mechanism of nickel-molybdenum alloy electrodeposition in citrate electrolytes

Cited by 158 publications

References 8 publications

Evaluation of Pt, Ni, and Ni–Mo electrocatalysts for hydrogen evolution on crystalline Si electrodes

Evaluation of Pt, Ni, and Ni–Mo electrocatalysts for hydrogen evolution on crystalline Si electrodes

Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating

Electrodeposition of Co-Ni-MoxOy Powders: Part I. The Influence of Deposition Conditions on Powder Composition and Morphology

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