Optimization of active surface area of flower like MoS2 using V-doping towards enhanced hydrogen evolution reaction in acidic and basic medium

Bolar, Saikat; Shit, Subhasis; Kumar, J. Sharath; Murmu, Naresh Chandra; Ganesh, R. Sankar; Kuila, Tapas

doi:10.1016/j.apcatb.2019.04.028

Cited by 202 publications

(136 citation statements)

References 65 publications

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“…Figure a represents the linear sweep voltammetry (LSV) polarization curves of the samples, presenting onset overpotential of 38, 97, 122 and 135 mV for sample composition of NMS2, NMS1, NMS3, and MoS 2 , respectively. These values were smaller than other reported MoS 2 , illustrating an improved HER activity among the MoS 2 ‐based electrocatalysts . From the polarization curves, it was observed that the NMS2 showed lowest overpotential value than the other N‐doped compositions (NMS1 and NMS2).…”

Section: Resultssupporting

confidence: 85%

“…These values were smaller than other reported MoS 2 , illustrating an improved HER activity among the MoS 2based electrocatalysts. [24,26,28] From the polarization curves, it was observed that the NMS2 showed lowest overpotential value than the other N-doped compositions (NMS1 and NMS2). Pt/C considered as the superior electrocatalyst for HER in acidic/ alkaline medium.…”

Section: Resultsmentioning

confidence: 97%

“…The prepared samples had Tafel slopes of 37–68 mVdec −1 in acidic solution, which follows the Volmer‐Heyrovsky mechanism [Eq. ]

true 2 H^{+} + 2 e^{-} \to H_{2}

…”

Section: Resultsmentioning

confidence: 99%

“…(1)]. [28,37,43] 2H þ þ 2e À ! H 2 (1) In the Volmer-Heyrovsky reactions, the hydrogen (H 2 ) is formed through two elementary steps [Eqs.…”

Section: Resultsmentioning

confidence: 99%

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Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

et al. 2020

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Hydrogen evolution reaction (HER) was improved through nitrogen (N) doping in molybdenum disulfide (MoS2) due to the formation of 1T‐metallic phase as compared to the thermodynamically stable 2H‐semiconducting phase. Generally, the phase transition of MoS2 from semiconducting 2H to metallic 1T was carried out by chemical intercalation method. A facile solvothermal synthetic procedure is used to organize 1T@2H MoS2 nanoflower by incorporating N in MoS2 crystal lattice which improved the catalytic activity with the generation of metallic property of MoS2. Optimized N doping is an effective strategy for the development of mixed phase MoS2. Physicochemical characterization techniques confirmed the formation of hybrid phase (1T@2H) MoS2 by N incorporation. A tuned dopant concentration in MoS2 crystal lattice effectively enhanced the catalytic performance by modifying the physical and chemical properties. Moreover, optimal N doped MoS2 offered a very low overpotential of ∼108 and ∼141 mV to reach the benchmarking current density of 10 mA cm−2 for HER in acidic and basic medium, respectively. This work elucidated a rational implantation of phase engineering, which is an efficient strategy to develop efficient electrocatalysts, shedding light on the improvement of transition metal‐based electrocatalyst in renewable energy technologies.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 97%

“…The prepared samples had Tafel slopes of 37–68 mVdec −1 in acidic solution, which follows the Volmer‐Heyrovsky mechanism [Eq. ]

true 2 H^{+} + 2 e^{-} \to H_{2}

…”

Section: Resultsmentioning

confidence: 99%

“…(1)]. [28,37,43] 2H þ þ 2e À ! H 2 (1) In the Volmer-Heyrovsky reactions, the hydrogen (H 2 ) is formed through two elementary steps [Eqs.…”

Section: Resultsmentioning

confidence: 99%

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Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

et al. 2020

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“…On the other hand, molybdenum disulfide MoS 2 is a well‐studied transition metal dichalcogenide (TMD) that has proven to be an auspicious material for HER due to its inherent electrocatalytic properties . Depending on the agent employed for exfoliation and the number of electrons of the transition metal that fill the d orbitals, TMDs display various symmetries, that is, trigonal‐prismatic D 3 h symmetry showing semiconducting properties and octahedral O h coordination exhibiting metallic properties .…”

Section: Introductionmentioning

confidence: 99%

Bottom‐Up Synthesized MoS₂ Interfacing Polymer Carbon Nanodots with Electrocatalytic Activity for Hydrogen Evolution

Kagkoura

Cantón-Vitoria

Vallan

et al. 2020

Chemistry A European J

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The preparation of an MoS 2 -polymer carbon nanodot (MoS 2 -PCND) hybrid material was accomplished by employing an easy and fast bottom-up synthetic approach. Specifically, MoS 2 -PCND was realized by the thermal decomposition of ammonium tetrathiomolybdate and the in situ complexation of Mo with carboxylic acid units present on the surface of PCNDs. The newly prepared hybrid material was comprehensively characterized by spectroscopy,t hermal means, and electron microscopy.T he electrocatalytic activity of MoS 2 -PCND was examined in the hydrogen evolution reaction (HER) andc ompared with that of the corresponding hybrid material prepared by at op-downa pproach, namely MoS 2 -PCND(exf-fun), in which MoS 2 was firstly exfoliated and then covalently functionalized with PCNDs. The MoS 2 -PCND hybrid material showed superior electrocatalytic activity toward the HER with low Ta fel slope,e xcellent electrocatalytic stability,a nd an onset potentialo fÀ0.16 Vv ersus RHE. The superior catalytic performance of MoS 2 -PCND was rationalized by considering the catalytically active sites of MoS 2 ,t he effective charge/energy-transfer phenomena from PCNDs to MoS 2 ,and the synergeticeffect between MoS 2 and PCNDs in the hybrid material.

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Corrosion Engineering on Iron Foam toward Efficiently Electrocatalytic Overall Water Splitting Powered by Sustainable Energy

Zhao

et al. 2021

Adv Funct Materials

144

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Exploiting highly effective and low‐cost electrocatalysts for the hydrogen evolution reaction (HER) is a pressing challenge for the development of sustainable hydrogen energy. In this work, a facile and industrially compatible one‐pot corrosion strategy for the rapid synthesis of amorphous RuO2‐decorated FeOOH nanosheets on iron foam (FFNaRu) within 1 h is reported. Corrosion is a common and inevitable phenomenon that occurs on metal surfaces without electricity input, high temperature, and tedious synthetic procedures. The FFNaRu electrode is superhydrophilic and aerophobic, which guarantees intimate contact with the electrolyte and accelerates the instantaneous escape of produced gas bubbles during the electrocatalytic process. Moreover, the strong electronic interactions between RuO2 and FeOOH promote the electrocatalytic process via dramatically improving the electrochemical interfacial properties. Thus, the FFNaRu electrocatalyst presents excellent catalytic activity towards the HER (30 mV at 10 mA cm–2) and overall water‐splitting (230 mV at 10 mA cm–2) in 1 M KOH. The overall water‐splitting could be simply powered by sustainable and intermittent sunlight, wind, and thermal energies motivated Stirling engine. Density functional theory calculations confirm that coupling effects between RuO2 and FeOOH are also responsible for promoting the electrocatalytic HER performance.

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Optimization of active surface area of flower like MoS2 using V-doping towards enhanced hydrogen evolution reaction in acidic and basic medium

Cited by 202 publications

References 65 publications

Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Bottom‐Up Synthesized MoS₂ Interfacing Polymer Carbon Nanodots with Electrocatalytic Activity for Hydrogen Evolution

Corrosion Engineering on Iron Foam toward Efficiently Electrocatalytic Overall Water Splitting Powered by Sustainable Energy

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Optimization of active surface area of flower like MoS2 using V-doping towards enhanced hydrogen evolution reaction in acidic and basic medium

Cited by 202 publications

References 65 publications

Doping‐Assisted Phase Changing Effect on MoS2 Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Doping‐Assisted Phase Changing Effect on MoS2 Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Bottom‐Up Synthesized MoS2 Interfacing Polymer Carbon Nanodots with Electrocatalytic Activity for Hydrogen Evolution

Corrosion Engineering on Iron Foam toward Efficiently Electrocatalytic Overall Water Splitting Powered by Sustainable Energy

Contact Info

Product

Resources

About

Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Doping‐Assisted Phase Changing Effect on MoS₂ Towards Hydrogen Evolution Reaction in Acidic and Alkaline pH

Bottom‐Up Synthesized MoS₂ Interfacing Polymer Carbon Nanodots with Electrocatalytic Activity for Hydrogen Evolution