Platinum-Group Metal Grown on Vertically Aligned MoS2 as Electrocatalysts for Hydrogen Evolution Reaction

Shokhen, Victor; Zitoun, David

doi:10.1016/j.electacta.2017.10.014

Cited by 20 publications

(16 citation statements)

References 36 publications

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“…This mechanism should be further confirmed in the following research topic. Finally, although the obtained performance of the present MoS 2 sample was relatively better than that of some previous MoS 2 based materials 18,26 , it has been still far from that of Pt-based catalysts (Tafel slope~30 mV/dec) 27 . Therefore, some additional works are required to improve current results further.…”

Section: Discussioncontrasting

confidence: 63%

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Nguyen

2021

Sci. Tech. Dev. J.

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Introduction: Using the metal organic chemical vapor deposition (MOCVD) method, we have synthesized the MoS2 nanoparticles on graphite foil substrates employed as the electrochemical working electrodes with highly efficient electrocatalysis for hydrogen evolution reaction (HER). Methods: The morphological and structural properties of the as-grown MoS2 materials were demonstrated by field emission scanning electron microscope (FESEM) and Raman spectroscopies, while their elemental components were investigated by X-ray photoelectron spectroscopy (XPS). Results: The optimum growth time was acquired to be 11 hours. Thereby such obtained electrode exhibited the maximum HER activity with onset over the potential of 220 mV versus reversible hydrogen electrode (RHE), and the Tafel slope of 66 mV per decade (mV/dec). Conclusion: Our results suggest a good technique for the research of high-efficient HER electrocatalyst based on atomic-thickness layered materials.

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Section: Discussioncontrasting

confidence: 63%

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Nguyen

2021

Sci. Tech. Dev. J.

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“…The linear sweep voltammetry in Figure shows that the performance of the electrode remained stable up to 4000 cycles. The stability observed is favorable compared to similar materials previously reported which, despite their high activity, began to slowly show degradation after 1000 cycles . This suggests that mechanisms such as metal leaching (Ag, Pd, or Mo) or surface oxidation do no impede the continued performance of the electrode in the electrochemical window tested.…”

Section: Resultssupporting

confidence: 57%

“…Several MoS 2 morphologies have been exploited in an attempt to maximize HER activity including vertically aligned flakes with modified termination, 3D MoS 2 /graphene foams, core‐shell structures with metals, metal oxides, or other TMDs, and defect‐rich basal planes laden with lattice substitutions or decorated with nanoparticles . Specifically, interest has been given towards the formation of composite electrodes, in some cases, composed of MoS 2 and minimal amounts of silver (Ag) and/or palladium (Pd) .…”

Section: Introductionsupporting

confidence: 72%

Catalytic Hydrogen Evolution Reaction Enhancement on Vertically Aligned MoS₂ by Synergistic Addition of Silver and Palladium

et al. 2020

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Hybrid electrodes containing MoS2 with metals active for the hydrogen evolution reaction (HER) are highly desirable as they can provide a cost‐effective and active route for producing hydrogen. It is well known that the technique used to facilitate such hybrid formation plays a critical role in the activity and stability of the electrode. Here we utilized a novel method for hybridization based on electron‐beam deposition of Ag, Pd, and Mo to make precursor films which, upon sulfurization, formed hybrid electrodes based on vertically aligned molybdenum disulfide (VA‐MoS2). We further modified the surface of these electrodes by exploiting galvanic replacement of palladium. Surprisingly, both hybridization techniques showed a synergistic effect between Pd and Ag, and enhanced activity was enabled by the presence of both metals. XPS, XRD, Raman spectroscopy, and FIB‐EM were used to explore the root cause of the synergy. It appears that enhanced performance is based partially on the mutual solubility of Pd−Ag and the facile diffusion of Ag through the MoS2 film. Ag/VA‐MoS2 modified by galvanic replacement provided 10 mA/cm2 at 210 mV of overpotential and was stable for up to 4000 cycles, surpassing the stability of previously reported Pd/MoS2 hybrids, making these techniques of interest for future generations of hybrid HER electrodes based on MoS2.

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“…[117] Taking advantage of electrocatalytic properties of electroactive materials such as graphene, MoO 2 , MoO 3 , TiO 2 , CoOH, Mo 2 C, Mo 2 N, MoP, CoS 2 , WS 2 , NiS, Ni 3 S 2 , Pt and Ru, etc., its heterostructures with vertically aligned MoS 2 nanosheets have been explored and demonstrated for HER activities. [122,[209][210][211][212][213][214][215][216][217][218][219][220][221] As presented in Figure 22a-c, the vertically aligned MoS 2 / Mo 2 C hybrid nanosheets grown on conducting carbon paper exhibited a much lower HER overpotential than that of bare Mo 2 C and MoS 2 . [210] The low overpotential is mainly due to the Mo-S-C active sites and highly dispersed Mo 2 C nanodomains on the original edges and basal planes of MoS 2 .…”

Section: Water Splittingmentioning

confidence: 99%

“…[224] Comparative information on the HER performance of different vertical homo and heterojunction materials is provided in Table 4. [222,136,117,206,207,209,[211][212][213][214][215][216][217][218][219][220][221] [210] Copyright 2017, American Chemical Society. d) Overall water splitting by use of O-CoMoS heteronanosheets array as anode and cathode in alkaline solution, e) overall water splitting performance, f) time dependence of current densities under constant potential.…”

Section: Water Splittingmentioning

confidence: 99%

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

Shinde

Samal

Rout

2022

Adv Materials Inter

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2D materials currently includes graphene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), 2D carbides/nitrides (MXenes), monoelemental Xenes, and perovskites. [2][3][4][5][6] These families opened new horizons for advanced applications since they have unusual electronic, mechanical, and optical properties. Though these materials have layered structures, yet their diversity in properties highly depends on their composition and phases.Graphene owns interesting properties like large surface area, dangling bond-free surface, high carrier mobility, high optical absorption coefficient, high Young's modulus, and high thermal conductivity. [7] However, the zero bandgap and semimetal properties of graphene limit its application in switching devices. h-BN attracted magnetized attention due to its superb chemical stability and intrinsic insulation. [8] As one of the most studied families, TMDs offer diversity in compositions, and phases, which exhibit many technologically interesting properties. [9][10][11] Among TMDs, MoS 2 is the most examined and well-explored material due to its robustness and semiconducting properties. TMDs offer a unique combination of atomic-scale thickness, strong spin-orbit coupling, sizeable bandgap, and favorable optoelectronic properties for numerous applications. [12] MXenes represent a large family of 2D materials whose several structures were predicted theoretically, while several of them have been realized experimentally also such as Ti

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Platinum-Group Metal Grown on Vertically Aligned MoS2 as Electrocatalysts for Hydrogen Evolution Reaction

Cited by 20 publications

References 36 publications

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Catalytic Hydrogen Evolution Reaction Enhancement on Vertically Aligned MoS₂ by Synergistic Addition of Silver and Palladium

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

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Platinum-Group Metal Grown on Vertically Aligned MoS2 as Electrocatalysts for Hydrogen Evolution Reaction

Cited by 20 publications

References 36 publications

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Effect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles

Catalytic Hydrogen Evolution Reaction Enhancement on Vertically Aligned MoS2 by Synergistic Addition of Silver and Palladium

Vertically Aligned Graphene‐Analogous Low‐Dimensional Materials: A Review on Emerging Trends, Recent Developments, and Future Perspectives

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Catalytic Hydrogen Evolution Reaction Enhancement on Vertically Aligned MoS₂ by Synergistic Addition of Silver and Palladium