Prior oxidation of Ni substrates increases the number of active sites in Ni<sub>3</sub>S<sub>2</sub> obtained by sulfidation and enhances its multifunctional electrocatalytic activity

Sengeni, Anantharaj; Noda, Suguru

doi:10.1039/d3ta07513c

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta07513c

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Prior oxidation of Ni substrates increases the number of active sites in Ni₃S₂ obtained by sulfidation and enhances its multifunctional electrocatalytic activity

Anantharaj Sengeni,

Suguru Noda

Abstract: An unconventional method of improving the electrocatalytically accessible number of Ni sites (ECAS) in a nickel sulphide catalyst has been developed. The unconventional method assisted enhancement in the ECAS of...

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Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Ramírez,

Lopéz-Frances,

Baldoví

et al. 2024

International Journal of Biological Macromolecules

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Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Ramírez,

Lopéz-Frances,

Baldoví

et al. 2024

International Journal of Biological Macromolecules

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Tailoring CoNi₂Se₄@Ti₂NbC₂T_x MXene as a Bifunctional Nanocomposite Electrocatalyst for Overall Water Splitting and an Electrode Material for Supercapacitors

Kumar S P,

Kartigueyane,

Rajendra

et al. 2024

Energy Fuels

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In recent advancements, bimetal MXene has emerged as a promising electrocatalyst as well as a catalytic supportive material due to its unique properties, including rich chemistry and potential metal-like conductivity. This study introduces a novel bifunctional electrocatalyst for overall water splitting, involving the synthesis of sea urchin-like CoNi 2 Se 4 onto Ti 2 NbC 2 T x using a simple two-step solvothermal method. The developed CoNi 2 Se 4 @Ti 2 NbC 2 T x is subjected to physical and surface topographical investigation using X-ray diffraction, fieldemission scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy techniques. The synergistic effect of the prepared bifunctional nanocomposite shows extraordinary kinetic metrics for both HER and OER processes. It shows a low overpotential of 76 mV at 10 mA cm −2 and a small Tafel slope of 78.6 mV dec −1 for the HER and an overpotential of 203 mV at 10 mA cm −2 with a Tafel slope of 102.2 mV dec −1 for the OER. CoNi 2 Se 4 @Ti 2 NbC 2 T x exhibits a lower exchange current density with an onset potential that highlights its enhanced performance. This CoNi 2 Se 4 @Ti 2 NbC 2 T x electrocatalyst has achieved a current density of 10 mA cm −2 at 1.55 V and maintained excellent electrocatalytic stability for 24 h. It reveals that CoNi 2 Se 4 @Ti 2 NbC 2 T x could be used as a cost-effective and efficient catalyst, paving the way for its application in clean hydrogen production through overall water splitting. Owing to its better electrochemical behavior, the prepared CoNi 2 Se 4 @Ti 2 NbC 2 T x material is also used as the electrode material for supercapacitor applications, and it exhibits a specific capacitance of about 2.05 F cm −2 at 2 mA cm −2 .

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Prior oxidation of Ni substrates increases the number of active sites in Ni₃S₂ obtained by sulfidation and enhances its multifunctional electrocatalytic activity

Abstract: An unconventional method of improving the electrocatalytically accessible number of Ni sites (ECAS) in a nickel sulphide catalyst has been developed. The unconventional method assisted enhancement in the ECAS of...

Cited by 2 publications

References 51 publications

Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Tailoring CoNi₂Se₄@Ti₂NbC₂T_x MXene as a Bifunctional Nanocomposite Electrocatalyst for Overall Water Splitting and an Electrode Material for Supercapacitors

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Prior oxidation of Ni substrates increases the number of active sites in Ni3S2 obtained by sulfidation and enhances its multifunctional electrocatalytic activity

Abstract: An unconventional method of improving the electrocatalytically accessible number of Ni sites (ECAS) in a nickel sulphide catalyst has been developed. The unconventional method assisted enhancement in the ECAS of...

Cited by 2 publications

References 51 publications

Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Hydrogel composites based on chitosan and CuAuTiO2 photocatalysts for hydrogen production under simulated sunlight irradiation

Tailoring CoNi2Se4@Ti2NbC2Tx MXene as a Bifunctional Nanocomposite Electrocatalyst for Overall Water Splitting and an Electrode Material for Supercapacitors

Contact Info

Product

Resources

About

Prior oxidation of Ni substrates increases the number of active sites in Ni₃S₂ obtained by sulfidation and enhances its multifunctional electrocatalytic activity

Tailoring CoNi₂Se₄@Ti₂NbC₂T_x MXene as a Bifunctional Nanocomposite Electrocatalyst for Overall Water Splitting and an Electrode Material for Supercapacitors