Three-dimensional nano assembly of nickel cobalt sulphide/polyaniline@polyoxometalate/reduced graphene oxide hybrid with superior lithium storage and electrocatalytic properties for hydrogen evolution reaction

Gautam, Jagadis; Liu, Yi; Gu, Jie; Ma, Zhiyuan; Dahal, Bipeen; Chishti, Aadil Nabi; Ni, Lubin; Wei, Yongge

doi:10.1016/j.jcis.2022.01.153

Cited by 30 publications

(16 citation statements)

References 57 publications

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“…The eighth PEI/[(TBA)Mo 12 (AleThio) 4 ] bilayer displayed much improved HER overpotential as compared to the very recently reported POM and polymer-based electrocatalysts such as Co/WC@NC 77 and NiCo 2 S 4 @PANI@ PW 12 /rGO. 78 In terms of catalytic efficiency, the reported Mo-containing POM [(TBA)Mo 12 (AleThio) 4 ] outperformed similar Mo-based systems such as the MoO 2 /rGO 45 composite, MoS 2 /MoO 2 -6 h, 44 and Mo 2 C/C. 40 Moreover, the catalyst loading over the electrode surface was high in all the referenced literature given in Table 2, compared to our nanolayer-modified electrode, which represents a significant advantage for the system presented in this work.…”

Section: Electrocatalytic Hydrogen Evolution Reactionmentioning

confidence: 99%

Layer-by-Layer Construction of a Nanoarchitecture by Polyoxometalates and Polymers: Enhanced Electrochemical Hydrogen Evolution Reaction

Sakthinathan

Köhling

Wagner

et al. 2023

ACS Appl. Mater. Interfaces

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In this contribution, a nanoarchitectural approach was employed to produce a nanolayer of polyoxometalate (POM) on the surface of a glassy carbon electrode (GCE) to achieve a higher surface area with higher electrocatalytic activity toward the electrochemical hydrogen evolution reaction (HER). To accomplish this, the well-known layer-by-layer (LbL) technique was employed, which involved the alternate adsorption of the POM, Na 0, abbreviated as [(TBA)Mo 12 (AleThio) 4 ], and polyethyleneimine (PEI) polymer. This nanolayered electrode exhibited catalytic properties toward the HER in 0.5 M H 2 SO 4 with the resulting polarization curves indicating an increase in the HER activity with the increasing number of POM layers, and the overpotential required for this reaction was lowered by 0.83 V when compared with a bare GCE. The eighth PEI/[(TBA)Mo 12 (AleThio) 4 ] bilayer exhibited a significantly lower HER overpotential of −0.077 V at a current density of 10 mA cm −2 . Surface characterization of the LbL-assembled nanolayers was carried out using X-ray photoelectron spectroscopy, atomic force microscopy, and scanning electron microscopy. We believe that the synergetic effect of the positively charged PEI polymer and the catalytically active molybdate POM is the cause for the successful response to the electrochemical HER.

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Section: Electrocatalytic Hydrogen Evolution Reactionmentioning

confidence: 99%

Layer-by-Layer Construction of a Nanoarchitecture by Polyoxometalates and Polymers: Enhanced Electrochemical Hydrogen Evolution Reaction

Sakthinathan

Köhling

Wagner

et al. 2023

ACS Appl. Mater. Interfaces

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“…The ratio of the intensities of the graphitic peak observed at 1570 cm -1 and that of the peak representing defects observed at 1345 cm -1 (I G /I D ) is ≈1.11, indicating that the high degree of graphitization of carbon results in the high conductivity of the material. [17,18] The chemical states and bonding in CNT@HCNF-1.5 among C, O, N, and Co were examined by XPS. The low-resolution survey spectrum (Figure S9, Supporting Information) provides the percentage of all the elements present in the samples, which are comparable to the results obtained from EDX.…”

Section: Physico-chemical Characterizationsmentioning

confidence: 99%

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

et al. 2022

Self Cite

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The hurdle of fabricating asymmetric supercapacitor (ASC) devices using a faradic cathode and a double layer anode is challenging due to the required large amount of active mass of anodic material compared to that of the cathodic material during mass balancing due to the large difference in capacitance values of the two electrodes. Here, the problem is addressed by engineering a negative electrode that furnishes an ultrahigh capacitance. An in situ developed metal-organic framework (MOF)-based thermal treatment is adopted to grow highly porous N-doped carbon nanotubes (CNTs) containing submerged Co nanoparticles over nano-fibrillated electrospun hollow carbon nanofibers (HCNFs).

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“…Worldwide, research is rising investigating safe, portable, renewable electrochemical electrical applications, and lightweight electrical gadgets, such as supercapacitors (SCs), which consider eco-friendly stabilities as well as higher energy/power densities [ 1 , 2 , 3 ]. In energy storage applications, supercapacitors (SCs) attained widespread consciousness on account of their extraordinary benefits in terms of rapid charging/discharging procedures, high reliability, excellent power densities, cheaper price, and environmental natures [ 4 , 5 , 6 , 7 ]. Meanwhile, the weaker energy densities of SCs have constricted them from laboratory scales to practical-span productivity [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Sulfur Nanoparticle-Decorated Nickel Cobalt Sulfide Hetero-Nanostructures with Enhanced Energy Storage for High-Performance Supercapacitors

et al. 2022

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Transition-metal sulfides exaggerate higher theoretical capacities and were considered a type of prospective nanomaterials for energy storage; their inherent weaker conductivities and lower electrochemical active sites limited the commercial applications of the electrodes. The sheet-like nickel cobalt sulfide nanoparticles with richer sulfur vacancies were fabricated by a two-step hydrothermal technique. The sheet-like nanoparticles self-combination by ultrathin nanoparticles brought active electrodes entirely contacted with the electrolytes, benefiting ion diffusion and charges/discharges. Nevertheless, defect engineers of sulfur vacancy at the atomic level raise the intrinsic conductivities and improve the active sites for energy storage functions. As a result, the gained sulfur-deficient NiCo2S4 nanosheets consist of good specific capacitances of 971 F g−1 at 2 A g−1 and an excellent cycle span, retaining 88.7% of the initial capacitance over 3500 cyclings. Moreover, the values of capacitance results exhibited that the fulfilling characteristic of the sample was a combination of the hydrothermal procedure and the surface capacitances behavior. This novel investigation proposes a new perspective to importantly improve the electrochemical performances of the electrode by the absolute engineering of defects and morphologies in the supercapacitor field.

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Three-dimensional nano assembly of nickel cobalt sulphide/polyaniline@polyoxometalate/reduced graphene oxide hybrid with superior lithium storage and electrocatalytic properties for hydrogen evolution reaction

Cited by 30 publications

References 57 publications

Layer-by-Layer Construction of a Nanoarchitecture by Polyoxometalates and Polymers: Enhanced Electrochemical Hydrogen Evolution Reaction

Layer-by-Layer Construction of a Nanoarchitecture by Polyoxometalates and Polymers: Enhanced Electrochemical Hydrogen Evolution Reaction

Homogeneous Elongation of N‐Doped CNTs over Nano‐Fibrillated Hollow‐Carbon‐Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematic

Sulfur Nanoparticle-Decorated Nickel Cobalt Sulfide Hetero-Nanostructures with Enhanced Energy Storage for High-Performance Supercapacitors

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