Synthesis and characterization of multiwalled carbon nanotubes supported La_xCa_1−xMnO₃ (x = 0.2, 0.3)

Multiwalled carbon nanotubes (MWCNTs) supported La x Ca 1 −x MnO 3 (x = 0.2, 0.3) were synthesized via wet impregnation method, calcined at 450 °C and under vacuum oven at 200 °C for six hours. The x-ray diffraction (XRD) analysis inferred the presence of carbon within parent crystal orientation of LaCaMnO 3 in synthesized MWCNT/La x Ca 1−x MnO 3 (x = 0.2, 0.3). Compositional analysis and binding energies profile of elements presents in synthesized samples was studied via x-ray photoelectron spectroscopy (XPS). Maximum output power density of La 0.2 Ca 0.8 MnO 3 /MWCNTs and La 0.3 Ca 0.7 MnO 3 /MWCNTs was found to be 277 mW cm −2 and 151 mW cm −2 at 600 °C observed from fuel cell data.