Abstract:
It is vital to synthesize non-noble metal-based electrocatalysts with bifunctional
electrocatalytic activity for both the oxygen reduction reaction (ORR) and the oxygen
evolution reaction (OER) to make it possible for metal air batteries to be highly
efficient and sustainable. This will allow for the use of metal air batteries. In this
research, a pure FeCo-MOF, a pure MnFeCo-MOF, and their composites with (1, 3,
5) wt% rGO were synthesized through the solvothermal technique and characterized
via XRD, SEM, EDX, FTIR, and RAMAN. The electrochemical process is made more
efficient thanks to the synergistic relationship between the MOF and the rGO
composites. In this research project, Mn-doped Fe/Co MOF and its rGO-based
composites were produced and tested as electrocatalysts for oxygen evolution
reactions (OER). X-ray diffraction (XRD) and scanning electron microscopy (SEM)
were utilized to conduct an investigation into the structural and morphological
characteristics of the materials that were manufactured. Cyclic voltammetry (CV) and
linear sweep voltammetry (LSV) were utilized to study the electrochemical
performance of the materials. When compared to the individual components, the 3
wt% rGO MnFeCo-MOF composites exhibited much higher OER catalytic activity
than the individual components. The improved composite demonstrated remarkable
electrocatalytic activity, outstanding durability, and satisfactory stability in alkaline
solutions. It was determined that the synergistic impact of MnFeCo-MOF and rGO
was responsible for the improved electrocatalytic performance of the composites. This
effect resulted in improved electronic conductivity, enhanced active sites, and reduced
charge transfer resistance. According to these findings, FeCo-MOF, MnFeCo-MOF
and its rGO composites have a significant amount of promise for use in metal-air
batteries as effective electrocatalysts for OER.
