1 research outputs found
Rational Design of Dynamic Bimetallic NiCoSe<sub>2</sub>/2D Ti<sub>3</sub>C<sub>2</sub>T<i><sub>x</sub></i> MXene Hybrids for a High-Performance Flexible Supercapacitor and Hydrogen Evolution Reaction
Herein, intelligent construction
of an NiCoSe2/Ti3C2Tx hybrid heterostructure
with unique morphologies was performed using a hydrothermal protocol.
The coexistence of the dual metal core in Ni–Co selenides and
Ti3C2Tx MXene helps
in realizing outclassing physicochemical properties. The two-dimensional
(2D) heterostructure provides an admirably smaller Tafel slope of
86 mV/dec, indicating the faster H2 evolution rate (Pt/C:
82 mV/dec) and overpotential of 62 mV at 10 mA/cm2 (Pt/C:
52 mV/dec). Our heterostructure devices demonstrate a specific energy
density of 32.05 Wh kg–1 coupled with a power density
of 0.2 kW kg–1 and maintain 15.39 Wh kg–1 coupled with a power density of 0.92 kW kg–1.
The experimental results underpin new profitable opportunities and
scale up deployment of the bifunctional electrodes. Further, the experimental
findings were supported through density functional theory (DFT) simulations
in terms of a lower overpotential and higher quantum capacitance for
the heterostructure NiCoSe2/MXene compared to pristine
NiCoSe2. There is charge transfer from MXene Ti3C2Tx to NiCoSe2 leading to enhanced electronic states near the Fermi level responsible
for enhanced catalytic activities and charge storage performance