Amorphous nickel/cobalt tungsten sulfide electrocatalysts for high-efficiency hydrogen evolution reaction

Yang, Lun; Wu, Xiaohong; Zhu, Xiaoshu; He, Chengyu; Meng, Ming; Gan, Zhixing; Chu, Paul K.

doi:10.1016/j.apsusc.2015.03.018

Cited by 72 publications

(40 citation statements)

References 76 publications

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“…Such a value of the MoS 2 -rGO is also more positive than the previously reported MoS 2 nanosheets with more complex nanostructures, [7][8] indicating the excellent HER activity of the sample. At a HER current density of 10 mA cm -2 which is regarded as the benchmark of application for practical electrochemical, [34][35][36] photo-catalytic and photo-elecrocatalytic cells, the overpotential of the MoS 2 -rGO is as low as 232 mV, adequate for practical applications. At the overpotential of 250 mV, the HER current density of the MoS 2 -rGO is ten-fold of that of the MoS 2 , suggesting the superior HER activity of the former.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical MoS2–rGO nanosheets with high MoS2 loading with enhanced electro-catalytic performance

Zhou

Han

Zhou

et al. 2015

Applied Surface Science

108

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Section: Resultsmentioning

confidence: 99%

Hierarchical MoS2–rGO nanosheets with high MoS2 loading with enhanced electro-catalytic performance

Zhou

Han

Zhou

et al. 2015

Applied Surface Science

108

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“…In particular, 3d transition metals (such as Fe, Co, and Ni), transition-metal sulfides, selenides, nitrides, carbides, phosphides, and borides as well as alloys and complexes have been demonstrated to be promising catalysts for the HER. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Recently, coordination compounds, such as a Ni bisdiphosphine based mimic of hydrogenase enzymes, [31] Cu II ethylenediamine (Cu-EA), polyoxometalate (POM) based metal-organic frameworks (MOFs), [32] [TBA] 3 [33] have also been developed as potential HER catalysts. Substantial research effort has also been devoted to the development of OER catalysts based on relatively inexpensive transition metals and their compounds, including transition-metal oxides, multimetal oxides, metal oxide based hybrids, substituted cobaltites (M x Co 3Àx O 4 ), hydro(oxy)oxides, phosphates, diselenide, metal oxide/diselenide hybrids, and chalcogenides.…”

Section: Recent Progress On Metal-based Catalysts For Water Splittingmentioning

confidence: 99%

Carbon‐Based Metal‐Free Catalysts for Electrocatalysis beyond the ORR

2016

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Besides their use in fuel cells for energy conversion through the oxygen reduction reaction (ORR), carbon-based metal-free catalysts have also been demonstrated to be promising alternatives to noble-metal/metal oxide catalysts for the oxygen evolution reaction (OER) in metal-air batteries for energy storage and for the splitting of water to produce hydrogen fuels through the hydrogen evolution reaction (HER). This Review focuses on recent progress in the development of carbon-based metal-free catalysts for the OER and HER, along with challenges and perspectives in the emerging field of metal-free electrocatalysis.

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“…The changes in the crystallite dimensions and in the stacking sequence can be also related to the formation of the [Ni(MoS4)2] 2− complex in the precursor solution at higher Ni concentrations. These species may provide an alternative route for nucleation and growth with respect to the standard synthesis promoted by pure ATM [52,53]. Figure 2C shows the Raman spectra of the 3D-MoS2 samples and a commercial bulk MoS2 sample (Aldrich) as reference.…”

Section: Synthesis and Physicochemical Characterizationmentioning

confidence: 99%

Effect of Ni Doping on the MoS2 Structure and Its Hydrogen Evolution Activity in Acid and Alkaline Electrolytes

et al. 2019

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We have investigated three-dimensional (3D) MoS2 nanoarchitectures doped with different amount of Ni to boost the hydrogen evolution reaction (HER) in alkaline environment, where this reaction is normally hindered. As a comparison, the activity in acidic media was also investigated to determine and compare the role of the Ni sites in both media. The doping of MoS2, especially at high loadings, can modify its structural and/or electronic properties, which can also affect the HER activity. The structural and electronic properties of the Ni doped 3D-MoS2 nanoarchitecture were studied by X-ray diffraction (XRD), Raman spectroscopy, scanning and transmission electronic microscopy (SEM; TEM), and X-ray photoemission Spectroscopy (XPS). XPS also allowed us to determine the Ni-based species formed as a function of the dopant loading. The HER activity of the materials was investigated by linear sweep voltammetry (LSV) in 0.5 M H2SO4 and 1.0 M KOH. By combining the physicochemical and electrochemical results, we concluded that the Ni sites have a different role in the HER mechanism and kinetics in acidic and in alkaline media. Thus, NiSx species are essential to promote HER in alkaline medium, whereas the Ni-Mo-S ones enhance the HER in acid medium.

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Amorphous nickel/cobalt tungsten sulfide electrocatalysts for high-efficiency hydrogen evolution reaction

Cited by 72 publications

References 76 publications

Hierarchical MoS2–rGO nanosheets with high MoS2 loading with enhanced electro-catalytic performance

Hierarchical MoS2–rGO nanosheets with high MoS2 loading with enhanced electro-catalytic performance

Carbon‐Based Metal‐Free Catalysts for Electrocatalysis beyond the ORR

Effect of Ni Doping on the MoS2 Structure and Its Hydrogen Evolution Activity in Acid and Alkaline Electrolytes

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