Synthesis of Co-doped MoS<sub>2</sub>/graphene hybrids as enhanced electrocatalysts for the hydrogen evolution reaction

Ye, Jianbo; Chen, Weixiang; Xu, Shurui; Yu, Zheting; Hou, Shicheng

doi:10.1039/c6ra23412g

Cited by 47 publications

(20 citation statements)

References 58 publications

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“…The peak located at 163.5 eV in CoS/NC related to the existence of C−S−C species, indicating that a certain amount of sulfur is doped into the lattice of the carbon matrix . Four peaks located at 284.2, 284.8, 285.4, and 286.4 eV in Figure e can be clearly observed, corresponding to C=C−C, C−S, C−N/O and C−O−C/C=O bonds, respectively ,,. The C−S and C−N bonds might be attributed to the partial replacement of C atom with S and N atoms in the hybrid .…”

Section: Resultsmentioning

confidence: 94%

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Zhao

Qian

et al. 2018

ChemElectroChem

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Uniquely structured CoS/N‐doped carbon@MoS2 (denoted as CoS/NC@MoS2) hollow spheres were successfully synthesized by using a well‐designed N‐rich Co‐metal organic framework (ZIF‐67) precursor and template. Owing to the good mechanical stability and conductivity of carbon hollow spheres, N‐doped carbon, and Co−Mo bonds, the as‐prepared CoS/NC@MoS2 composites exhibit outstanding electrochemical performance both in electrocatalytic and energy storage applications. An overpotential of 77 mV at 10 mA cm−2, and a Tafel slope of 67 mV dec−1 could be obtained in acid environment for the hydrogen evolution reaction. As an anode material for lithium‐ion batteries, the as‐prepared composites exhibit good cycling stability with a high reversible specific capacity of 802.4 mA h g−1 at a current density of 1 A g−1 after 400 cycles and good rate capability.

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Section: Resultsmentioning

confidence: 94%

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Zhao

Qian

et al. 2018

ChemElectroChem

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“…Comparing the performance of Ru‐MoS 2 /CL with other MoS 2 ‐based catalysts, it still outperformed many other catalysts since Ru‐MoS 2 /CL was located in the lower left corner of the diagram with low Tafel slope and overpotential at 10 mA cm −2 (Figure , Supporting Information). [ 7,18,22,36–49 ]…”

Section: Resultsmentioning

confidence: 99%

Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

Jiang

Shao

et al. 2020

Energy & Environ Materials

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The catalytic performance of Molybdenum disulfide (MoS2) has been still far from that of Pt‐based catalysts for inadequate active sites and sluggish electron transfer kinetics. Through engineering the interface between MoS2‐based materials and supported substrates, hybrid Ru‐doped MoS2 on carbonized lignin (CL) is designed and prepared as efficient catalyst for hydrogen evolution reaction (HER). The CL substrate not only facilitates the growth of MoS2 nanoflowers, but also promotes the electron transfer. Ru doping increases active sites greatly for HER. The hybrid catalyst achieves a low onset overpotential of 25 mV and a low Tafel slope of 46 mV dec−1. The favorable HER activity ascribes to the interfacial interaction between MoS2 and CL. Density functional theory calculations further confirm the improved HER performance with doped Ru atoms. This study presents a prototype application to design electrocatalysts with enhanced carrier mobility and high‐density active sites based on interface effect.

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“…37,41 The other two peaks found at 233.5 and 235.13 eV are analogous to Mo 3d5/2 and Mo 3d3/2 which implies the partial oxidation of Mo(IV) to Mo(VI) in air. 30,42 Figure 4B shows Co 2p spectra in which the two distinct peaks at 782.4 and 798.8 eV represents Co 2p 3/2 and Co 2p 1/2 respectively for Co(II). 43,44 Two satellite peaks at 786.22 and 802.5 eV concerning the main peaks for Co 2p 3/2 and Co 2p 1/2 are also observed.…”

Section: Structural Characterizationmentioning

confidence: 99%

An efficient CoMoS₂ nanosheets on nitrogen, sulfur dual doped reduced graphene oxide as an electrocatalyst for the hydrogen evolution reaction

Kumaran

Maiyalagan

2020

Intl J of Energy Research

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An increase in the necessity for clean and renewable energy leads to the production of hydrogen by several methods. Splitting of water by electrolysis is catching up to be a productive method to produce pure hydrogen with low cost and high efficiency using highly active non-noble metal electrocatalysts. MoS 2 has been widely studied for energy conservation devices for its 2D layered structure, excellent electronic conductivity, and high specific surface area. Incorporating transition metals (Co or Ni) will alter the intrinsic characteristic of MoS 2 by enhancing its electrocatalytic property for hydrogen evolution reaction. Hence MoS 2 , CoMoS 2, Co 0.5 MoS 2 and a composite of Co 0.5 MoS 2 with nitrogen sulfur doped graphene oxide were prepared by a facile hydrothermal method. Better performance was observed for the composite of Co 0.5 MoS 2 with N, S-rGO compared to other prepared catalysts with a low onset potential of 85 mV, overpotential (at 10 mA/cm 2 ) of 178 mV and Tafel slope of 63.8 mV/ dec. Further, the stability of the catalyst evaluated by chronoamperometric analysis demonstrated steady electrochemical performance for 12 hours.

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Synthesis of Co-doped MoS₂/graphene hybrids as enhanced electrocatalysts for the hydrogen evolution reaction

Abstract: Co-Doped MoS2/graphene hybrids with more exposed active sites and a Tafel slope of 44.3 mV dec−1 for HER were prepared.

Cited by 47 publications

References 58 publications

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

An efficient CoMoS₂ nanosheets on nitrogen, sulfur dual doped reduced graphene oxide as an electrocatalyst for the hydrogen evolution reaction

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Synthesis of Co-doped MoS2/graphene hybrids as enhanced electrocatalysts for the hydrogen evolution reaction

Abstract: Co-Doped MoS2/graphene hybrids with more exposed active sites and a Tafel slope of 44.3 mV dec−1 for HER were prepared.

Cited by 47 publications

References 58 publications

Heterostructure CoS/NC@MoS2Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Heterostructure CoS/NC@MoS2Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Interface Effect of Ru‐MoS2 Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

An efficient CoMoS2 nanosheets on nitrogen, sulfur dual doped reduced graphene oxide as an electrocatalyst for the hydrogen evolution reaction

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Product

Resources

About

Synthesis of Co-doped MoS₂/graphene hybrids as enhanced electrocatalysts for the hydrogen evolution reaction

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Heterostructure CoS/NC@MoS₂Hollow Spheres for High‐Performance Hydrogen Evolution Reactions and Lithium‐ION Batteries

Interface Effect of Ru‐MoS₂ Nanoflowers on Lignin Substrate for Enhanced Hydrogen Evolution Activity

An efficient CoMoS₂ nanosheets on nitrogen, sulfur dual doped reduced graphene oxide as an electrocatalyst for the hydrogen evolution reaction