Electrodeposition and characterization of NiMoW alloy as electrode material for hydrogen evolution in alkaline water electrolysis

Allam, Mahdi; Benaicha, Mohamed; Dakhouche, Achour

doi:10.1016/j.ijhydene.2017.08.012

Cited by 40 publications

(8 citation statements)

References 39 publications

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“…Still, in contrast to NiPD10 these cracks are distinct, sharp and lack the nodular characteristic. These cracks are usually formed by the release of the internal tensile stress developed due to hydrogen trapped in the coatings [50]. The NiPP100 sample exhibit a spheroid deposit with cracks as at high current pulses, enhanced mass deposition occurs with increased hydrogen generation during deposition.…”

Section: Resultsmentioning

confidence: 99%

Ni-P-based Alloy Coatings Prepared by Direct and Pulsed Electrodeposition for Hydrogen Evolution Reaction in Alkaline Media

Gaikwad

Banerjee

Pai

et al. 2022

Preprint

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Alkaline water electrolysis driven by renewable energy is a promising technology for green hydrogen generation. The cathode half-cell reaction i.e., the hydrogen evolution reaction (HER) in alkaline water electrolysis suffers from slow kinetics. Ni-P-based alloys have shown to be an efficient and cost-effective electrocatalyst to accelerate the HER rate. In this study, three Ni-P alloy coatings are prepared via electrodeposition by varying the deposition currents viz. 10 mA cm− 2 direct, 10 mAcm− 2 and 100 mAcm− 2 pulsed currents. The XRD patterns of all the Ni-P coatings exhibited the formation of crystalline deposits and confirmed the alloying of P in Ni. The SEM images suggested that the microstructures of the Ni-P alloy deposits are highly dependent on the magnitude and waveform of the applied current employed during preparation of the alloy coatings. The composition of the alloy surface is Ni-rich in all three cases but exhibited local variations as evaluated by EDX. The surface distributions of Ni and P in the pulsed deposited samples are more uniform and homogeneous. The cyclic voltammetry patterns of the Ni-P coatings in KOH media exhibit characteristic peaks due to Ni/Ni3+ redox phenomenon. The Ni2+/Ni3+ oxidation peak area is lowest for the direct deposited sample and highest for the pulsed deposited one (100 mAcm− 2). The Ni-P alloy electrocatalyst deposited under pulsed mode at 100 mAcm− 2 exhibits a current density of -10 mAcm− 2 at 0.09 V overpotential and is most active among all samples. The remarkable electrocatalytic activity of this sample is attributed to its smaller crystallite size, better morphological characteristics and lesser resistances to charge transfer and porosity.

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Section: Resultsmentioning

confidence: 99%

Ni-P-based Alloy Coatings Prepared by Direct and Pulsed Electrodeposition for Hydrogen Evolution Reaction in Alkaline Media

Gaikwad

Banerjee

Pai

et al. 2022

Preprint

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“…From this gure, it is clear that all of these curves look like universal current density transients recorded for the ordinary 3D nucleation and growth of a new phase. 26,27,[36][37][38] In the initial stage, due to the existence of active sites on the non-ideal cathode surface, Co-Ni bimetallic clusters grow radially, employing these active sites as growth centers. It should be noted that all these Co-Ni clusters are in steady-states and small, growing under diffusion control.…”

Section: Chronoamperometry Studymentioning

confidence: 99%

Co-deposition of Co–Ni alloy catalysts from an ethylene glycol system for the hydrogen evolution reaction

Zou

et al. 2023

RSC Adv.

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“…173 In addition to binary Mo-based alloys, the Mo-based ternary alloys are also very popular candidates, which have been studied by many research groups. 179 In Aruraj's research, they reported a series of Ni-Mo-based ternary alloys through electrodeposition on mild steel strips as hydrogen electrodes in alkaline solution. The activity sequence of Ni-Mo-based ternary alloys for the HER was in the order of Ni-Mo-Fe4 Ni-Mo-Cu4 Ni-Mo-Zn4 Ni-Mo-Co4 Ni-Mo-W4 Ni-Mo-Cr.…”

Section: Molybdenum-based Alloys and Their Compositesmentioning

confidence: 99%

Recent advances in Mo-based electrocatalysts toward the hydrogen evolution reaction and the hydrogen oxidation reaction

Wan

Fan

2023

New J. Chem.

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Electrodeposition and characterization of NiMoW alloy as electrode material for hydrogen evolution in alkaline water electrolysis

Cited by 40 publications

References 39 publications

Ni-P-based Alloy Coatings Prepared by Direct and Pulsed Electrodeposition for Hydrogen Evolution Reaction in Alkaline Media

Ni-P-based Alloy Coatings Prepared by Direct and Pulsed Electrodeposition for Hydrogen Evolution Reaction in Alkaline Media

Co-deposition of Co–Ni alloy catalysts from an ethylene glycol system for the hydrogen evolution reaction

Recent advances in Mo-based electrocatalysts toward the hydrogen evolution reaction and the hydrogen oxidation reaction

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