Rajnish Dhiman - Academia.edu (original) (raw)
Uploads
Papers by Rajnish Dhiman
Materials Today: Proceedings, 2022
Molybdenum Disulfide (MoS 2) is a two-dimensional material having hexagonal crystal structure, wh... more Molybdenum Disulfide (MoS 2) is a two-dimensional material having hexagonal crystal structure, which is widely used as a catalyst in various electrochemical reactions. In the present work, 2H-MoS 2 nanostructures are synthesized in the exfoliated form by a facile hydrothermal synthesis route and are studied as electrode material for electrochemical devices. Formation of 2H-MoS 2 phase has been confirmed by XRD and is also supported by the presence of E 1 2g and A 1 g bands in Raman spectroscopy which appears due to the formation of layered MoS 2 sheets. The FESEM images show MoS 2 sheets in the form of flowerlike microstructures. The ORR limiting current density obtained from polarization curves is 3.51 mA/cm 2 at 2400 rpm with an onset potential of 0.06 V vs RHE. The specific capacitance of 2H-MoS 2 as determined from CV and GCD are 115.42 F/g (at a scan rate of 10 mV/s) and 57.69 F/g (at current density 0.5 A/g) respectively and the samples retain 71.5 % of specific capacitance after 5000 CV cycles. The sample exhibited an electrochemical double layer capacitive (EDLC) behavior with partial pseudo-capacitance. The results suggest that the MoS 2-based materials are potential candidates as electrodes in the electrochemical devices.
Materials Today: Proceedings, 2022
Molybdenum Disulfide (MoS 2) is a two-dimensional material having hexagonal crystal structure, wh... more Molybdenum Disulfide (MoS 2) is a two-dimensional material having hexagonal crystal structure, which is widely used as a catalyst in various electrochemical reactions. In the present work, 2H-MoS 2 nanostructures are synthesized in the exfoliated form by a facile hydrothermal synthesis route and are studied as electrode material for electrochemical devices. Formation of 2H-MoS 2 phase has been confirmed by XRD and is also supported by the presence of E 1 2g and A 1 g bands in Raman spectroscopy which appears due to the formation of layered MoS 2 sheets. The FESEM images show MoS 2 sheets in the form of flowerlike microstructures. The ORR limiting current density obtained from polarization curves is 3.51 mA/cm 2 at 2400 rpm with an onset potential of 0.06 V vs RHE. The specific capacitance of 2H-MoS 2 as determined from CV and GCD are 115.42 F/g (at a scan rate of 10 mV/s) and 57.69 F/g (at current density 0.5 A/g) respectively and the samples retain 71.5 % of specific capacitance after 5000 CV cycles. The sample exhibited an electrochemical double layer capacitive (EDLC) behavior with partial pseudo-capacitance. The results suggest that the MoS 2-based materials are potential candidates as electrodes in the electrochemical devices.