• KASINATH OJHA

      Articles written in Journal of Chemical Sciences

    • Biomass derived graphene-like activated and non-activated porous carbon for advanced supercapacitors

      KASINATH OJHA BHARAT KUMAR ASHOK K GANGULI

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      Graphene-like activated and non-activated carbon nanostructures were synthesized from various natural sources like sugar, rice husk and jute. These carbon nanostructures were characterized using SEM, FTIR and Raman spectroscopy, surface area and thermogravimetric analysis. The electrochemical studies of these carbon materials confirm their promising characteristics for supercapacitor applications. Activated carbon nanostructures exhibit higher specific capacitance compared to that of non-activated carbons (non-Ac sugar).The activated carbon (Ac-jute) exhibits maximum specific capacitance of 476 F/g at an applied current density of 0.2 A/g which is much higher than that of graphene oxide (GO).

    • Facile charge transport in FeNx/Mo₂N/CNT nanocomposites for efficient hydrogen evolution reactions

      KASINATH OJHA SHIVALI BANERJEE ASHOK K GANGULI

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      Molybdenum based materials are gaining importance as electrocatalysts for hydrogen evolution reaction because of their lowcost and good electrocatalytic efficiency. Introducing iron nitride with molybdenum nitride as a composite results in efficient hydrogen evolution activity with current density of ∼120mA/cm2 at −400 mVvs. RHE. The nanocomposites were characterized using powder XRD, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), ElectronDiffraction, ThermogravimetricAnalysis and FTIRSpectroscopy. The electrochemical investigations suggest that the electrocatalytic activity of the composite increases with iron nitride content. The composite exhibits good electrochemical stability upto 42 hours in acidic medium. The hydrogen evolution reaction (HER) follows Volmer-Heyrovsky mechanism where Volmer reaction is the rate determing step.

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