1 research outputs found
Flower-like Layered NiCu-LDH/MXene Nanocomposites as an Anodic Material for Electrocatalytic Oxidation of Methanol
Direct methanol fuel cell (DMFC) technology has grabbed
much attention
from researchers worldwide in the realm of green and renewable energy-generating
technologies. Practical applications of DMFCs are marked by the development
of highly active, efficient, economical, and long-lasting anode catalysts.
Layered double hydroxide (LDH) nanohybrids are found to be efficient
electrode materials for methanol oxidation. In this study, we synthesized
NiCu-LDH/MXene nanocomposites (NCMs) and investigated
their electrochemical performance for methanol oxidation. The formation
of NCM was verified through field emission scanning electron microscopy
(FE-SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction
(XRD), Fourier transform infrared (FTIR) spectroscopy, Brunauer–Emmett–Teller
(BET), and X-ray photoemission spectroscopy (XPS) analyses. The cyclic
voltammetry, chronoamperometry, and electron impedance spectroscopy
techniques were carried out to assess the electrocatalytic ability
of the methanol oxidation reaction. The incorporation of MXene enhanced
the methanol oxidation 2-fold times higher than NiCu-LDH. NCM-45 exhibited
high peak current density (86.9 mA cm–2), enhanced
electrochemical active surface area (7.625 cm2), and long-term
stability (77.8% retention after 500 cycles). The superior performance
of NCM can be attributed to the synergistic effect between Ni and
Cu and, further, the electronic coupling between LDH and MXene. Based
on the results, NCM nanocomposite is an efficient anodic material
for the electrocatalytic oxidation of methanol. This study will open
the door for the development of various LDH/MXene nanocomposite electrode
materials for the application of direct methanol fuel cells