Uniform electrodeposition of Pd nanoparticles on MoS2-x nanosheets using magnetic fields for improved mass utilization in hydrogen evolution

Sheelam, Anjaiah; Bell, Jeffrey G.

doi:10.1016/j.ijhydene.2023.12.154

Cited by 4 publications

(2 citation statements)

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“…[32] An electrochemical generation of S-vacancies can be followed by the electrochemical deposition of metallic species to improve the HER activity. [36,37] For example, electrochemical deposition of Co-clusters (i. e., atomic clusters of Co 3 and Co 6 ) onto the surfaces of multilayers of MoS 2 containing electrochemically generated S-vacancies have exhibited an improvement in this material's activity towards the HER. [37] Herein, we report the electrodeposition of Pd and Pt on the edges and basal planes of exfoliated and desulfurized MoS 2 nanosheets towards seeking materials with an enhanced activity towards the HER.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity

Gautam,

Chugh,

Gates

2024

ChemSusChem

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Deposition of metal nanoparticles onto the molybdenum disulfide (MoS2) nanosheets is an efficient method to tune the electronic structure of the MoS2 and maximize its catalytic performance towards the hydrogen evolution reaction (HER). Herein, we report the electrodeposition of Pd and Pt nanoparticles onto desulfurized MoS2 nanosheets (MoS2‐x) to achieve an improved HER activity in an acidic electrolyte. The initial MoS2 powder was exfoliated and isolated through centrifugation, followed by electrochemical desulfurization to create defect sites. Subsequently, Pt and Pd nanoparticles were electrodeposited onto the S‐vacancies of MoS2‐x nanosheets. The resulting PdPt nanoparticles, with a diameter of 3.3 ±1.7 nm, were distributed across the surfaces of the nanosheets. A preferential deposition was evident at the edges of the nanosheets, particularly when Pd was deposited first followed by Pt. Owing to this preferential deposition of Pd and Pt and the synergistic interaction of MoS2‐x with Pd and Pt, the prepared catalyst exhibited a low overpotential of 30 mV at 10 mA cm−2, which is 2.7× lower than the MoS2‐x alone. The prepared catalyst exhibited a 1.7× increase in the mass activity at 20 mV overpotential, relative to that of a commercial Pt/C nanocatalyst, showcasing its promising potential as an alternative catalyst.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity

Gautam,

Chugh,

Gates

2024

ChemSusChem

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“…Although this effect has been known for many years, [25][26][27][28][29] only in recent years has it garnered significant interest for energy storage and conversion applications. [30][31][32][33][34] Much of the recent attention on magnetic fields in energy storage applications has focused on ferromagnetism, [35][36][37][38] but magnetic fields have been shown to affect the synthesis of materials that are not ferromagnetic as well. 39,40 The operation of both supercapacitor 41 and battery processes 23,42,43 have also been improved with the application of magnetism, primarily focusing on accelerating diffusion and altering depositions.…”

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confidence: 99%

On the Electrodeposition of Zinc in Low Magnetic Fields

McLeod,

Glasco,

Boni

et al. 2024

J. Electrochem. Soc.

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While aqueous zinc-based batteries have garnered much research on account of their improved safety, lower cost, and easier fabrication over lithium-ion batteries, they remain held back by dendrite growth on the anode. While many different solutions have been proposed, these solutions often greatly complicate the synthesis or materials in the battery. The application of a magnetic field across the battery has been shown to inhibit dendrite formation without the need for any materials or interface engineering. Herein, we provide a study on the effects of low magnetic fields on the electrodeposition and cycling of zinc in various aqueous systems. We demonstrate that although stronger fields have more immediate impacts on the morphology of zinc deposits, low magnetic fields are still suitable for inhibiting dendrite growth over long periods of cycling. Magnetic field strengths as low as 29 mT were shown to decrease charge transfer resistance of zinc ion deposition by up to 54% and to stabilize the cycling of Zn/Zn symmetric cells. Furthermore, the versatility of magnetic field application was demonstrated by affecting the morphology of zinc deposits on both copper and single-walled carbon nanotubes, which are both compatible with anode-free configurations of aqueous zinc-ion batteries.

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WITHDRAWN: Magnetic field-assisted electrodeposition of ZnCo2O4-rGo nanoelectrodes for enhanced supercapacitor performance

Li,

Xia,

et al. 2024

Chemical Engineering Journal

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Uniform electrodeposition of Pd nanoparticles on MoS2-x nanosheets using magnetic fields for improved mass utilization in hydrogen evolution

Cited by 4 publications

References 54 publications

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity

On the Electrodeposition of Zinc in Low Magnetic Fields

WITHDRAWN: Magnetic field-assisted electrodeposition of ZnCo2O4-rGo nanoelectrodes for enhanced supercapacitor performance

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Uniform electrodeposition of Pd nanoparticles on MoS2-x nanosheets using magnetic fields for improved mass utilization in hydrogen evolution

Cited by 4 publications

References 54 publications

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS2 Nanosheets for Enhanced Hydrogen Evolution Activity

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS2 Nanosheets for Enhanced Hydrogen Evolution Activity

On the Electrodeposition of Zinc in Low Magnetic Fields

WITHDRAWN: Magnetic field-assisted electrodeposition of ZnCo2O4-rGo nanoelectrodes for enhanced supercapacitor performance

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Product

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Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity

Electrodeposition of PdPt Nanoparticles on Edges and S‐Vacancies in Exfoliated MoS₂ Nanosheets for Enhanced Hydrogen Evolution Activity