A high performance supercapacitor based on decoration of MoS<sub>2</sub>/reduced graphene oxide with NiO nanoparticles

Ghasemi, Foad; Jalali, Mohammadnabi; Abdollahi, Ali; Mohammadi, Somayeh; Sanaee, Zeinab; Mohajerzadeh, S.

doi:10.1039/c7ra09060a

Cited by 68 publications

(52 citation statements)

References 64 publications

(86 reference statements)

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“…10 Nanostructured materials that have been studied for this purpose include carbon-based materials 11 and conducting polymers. 12 However, these materials have disadvantages, such as high resistivity (carbon-based materials) and easy mechanical degradation (conducting polymers), both of which may lead to decreased capacitance.…”

Section: 6mentioning

confidence: 99%

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

et al. 2018

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Metal oxide nanostructures have been extensively used in electrochemical devices due to their advantages, including high active surface area and chemical stability. However, the electrochemical properties of metal oxides are strongly dependent on their structural characteristics. We performed a comparative study on the electrochemical performance of nanoporous nickel oxide (NiO) nanosheets and nanowires. The advanced nanoporous NiO nanomaterials were synthesized by a facile hydrothermal method followed by thermal calcination. The synthesized nanomaterials, as characterized by scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, and nitrogen adsorption/desorption isotherms, demonstrated the nanoporosity and high crystallinity of the NiO nanosheets and nanowires. Cyclic voltammetry measurement was performed using a three-electrode system to evaluate the electrochemical properties of the synthesized materials. Results showed that the nanoporous NiO nanosheets possessed a higher current density than that of the nanowires by approximately ten times. Moreover, the nanoporous NiO nanosheets showed exceptionally high stability of almost 100%, after three cycles in strong alkaline environments, thereby suggesting possible application in electrochemical devices.

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Section: 6mentioning

confidence: 99%

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

et al. 2018

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“…Furthermore, substantial oxygen vacancies in graphene will lead to a dramatically increase of O ad , which might contribute to its improved electrocatalytic activity of PtCo@Co‐BA/Gr. In Figure c, the peaks at 780.67 eV (Co 2p 3/2 ), 796.67 eV (Co 2p 1/2 ) are corresponding to Co(0), and the peaks at 786.66 eV (Co 2p 3/2 ) and 802.71 eV (Co 2p 1/2 ) are ascribed to Co(II) species . The increases of Co(0) ratio in both PtCo@Co‐BA and PtCo@Co‐BA/Gr indicate the partial fracture of CoO bond in the original Co‐BA skeleton and the formation of PtCo alloy.…”

Section: Resultsmentioning

confidence: 94%

Electrocatalytic Enhancement of 0D/1D/2D Multidimensional PtCo Alloy@Cobalt Benzoate/Graphene Composite Catalyst for Alcohol Electro‐Oxidation

Bai

Tian²,

Wang

et al. 2019

Adv Materials Inter

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PtCo alloy@cobalt benzoate/graphene (PtCo@Co‐BA/Gr) composite catalyst with 0D/1D/2D multidimensional structure is presented with simple solvothermal approach. As the introduced critical carrier, benzoic acid cobalt (II) (Co‐BA) has porous channels matching the size of platinum (Pt) nanoparticles and can enable PtCo alloy particles to be formed in its 1D mesopores through in situ reduction. Experiments indicate that the hydroxyl (OH) groups on the outer surface of Co‐BA are beneficial to form a strong interaction between Co‐BA and graphene. Compared with commercial Pt/C catalyst, the prepared PtCo@Co‐BA/Gr composite catalysts display an enlarged electrochemically active surface area, enhanced catalytic activity, and prolonged durability in acidic media toward the oxidation of various alcohols, such as methanol, ethanol, and ethylene glycol, which is mainly due to the increased surface area of PtCo by the confinement of mesoporous Co‐BA fiber, the promotion of water molecule dissociation of Co‐BA skeleton, and the improvement of conductivity by the introduction of graphene.

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“…However, catalyst particle is surrounded by a thin carbon layer and buried inside nanotubes 21 . GO dispersion was synthesized by a modified Hummer's method 22 (see methods). The TEM image of the Go few layers is presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1c where its transparency and corrugated structure prove the suitable exfoliation of initial flakes. Moreover, the selected area electron diffraction (SAED) pattern shows the hexagonal crystalline structure of the Go sheet 22 . The fuzzy rings in the SAED pattern may be because of the presence of oxygen containing functional groups in the Go surface 22 .…”

Section: Resultsmentioning

confidence: 99%

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Vertically aligned carbon nanotubes, MoS2–rGo based optoelectronic hybrids for NO2 gas sensing

Ghasemi

2020

Sci Rep

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A simple method is developed through drop-casting techniques to assemble a molybdenum disulfide (MoS2)-reduced graphene oxide (rGO) hybrid on vertically aligned carbon nanotubes (VACNTs) to perform as an optoelectronic device for nitrogen dioxide (NO2) gas sensing at room temperature. The VACNT not only forms an ohmic contact with the hybrid material, but also yields a weak charge impurity scattering in the rGo layers across the channel. These features dramatically affect the optical response of the device to the light through which improve the photoresponsivity by up to 236% and the response time by up to 40% compared to the Au contacted device. Next, the fabricated MoS2–rGo/VACNTs device is employed as a resistor gas sensor for NO2 under in situ exposure to the light at room temperature. Under laser illumination, the sensor demonstrates a high sensitivity of ~ 41% at an inlet NO2 concentration of 100 ppm with a complete recovery time of ~ 150 s which shows comparable improvements relative to the sensor performance in dark condition.

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A high performance supercapacitor based on decoration of MoS₂/reduced graphene oxide with NiO nanoparticles

Abstract: GO and MoS2 solution in combination with NiO nanoparticles present a high performance supercapacitor and excellent cycling stability.

Cited by 68 publications

References 64 publications

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

Electrocatalytic Enhancement of 0D/1D/2D Multidimensional PtCo Alloy@Cobalt Benzoate/Graphene Composite Catalyst for Alcohol Electro‐Oxidation

Vertically aligned carbon nanotubes, MoS2–rGo based optoelectronic hybrids for NO2 gas sensing

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A high performance supercapacitor based on decoration of MoS2/reduced graphene oxide with NiO nanoparticles

Abstract: GO and MoS2 solution in combination with NiO nanoparticles present a high performance supercapacitor and excellent cycling stability.

Cited by 68 publications

References 64 publications

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

A comparative study on the electrochemical properties of nanoporous nickel oxide nanowires and nanosheets prepared by a hydrothermal method

Electrocatalytic Enhancement of 0D/1D/2D Multidimensional PtCo Alloy@Cobalt Benzoate/Graphene Composite Catalyst for Alcohol Electro‐Oxidation

Vertically aligned carbon nanotubes, MoS2–rGo based optoelectronic hybrids for NO2 gas sensing

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A high performance supercapacitor based on decoration of MoS₂/reduced graphene oxide with NiO nanoparticles