Incorporation effect of nanosized perovskite LaFe0.7Co0.3O3 on the electrochemical activity of Pt nanoparticles-multi walled carbon nanotube composite toward methanol oxidation

Nanosized perovskite LaFe0.7Co0.3O3 (LFCO) is synthesized through conventional co-precipitation method and characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) techniques. The incorporation effect of the mentioned perovskite to catalytic activity of the PtNPs-MWCNTs-nafion (or -chitosan) catalyst toward methanol oxidation has been studied by cyclic voltammetry. Based on the electrochemical studies, all MWCNTs-PtNPs-nafion (or chitosan) and MWCNTs-PtNPs-LFCO-nafion (or chitosan) catalysts show a considerable activity for methanol oxidation. However, a synergistic effect is observed when LFCO is added to the catalyst by decreasing the poisoning rate of the Pt catalyst.

Nanosized perovskite LaFe0.7Co0.3O3 is synthesized and characterized. The incorporation effect of the mentioned perovskite to catalytic activity of the PtNPS-MWCNTs-nafion (or -chitosan) catalyst toward methanol oxidation is studied. Figure optionsDownload as PowerPoint slideHighlights
► Nanocrystalline LaFe0.7Co0.3O3 (LFCO) is prepared by a new simple co-precipitation method.
► Effect of LFCO to catalytic activity of PtNPS for methanol oxidation is studied.
► A synergistic effect is observed when LFCO is added to the Pt catalyst.
► Oxygen of LFCO could be considered as active oxygen to remove CO intermediates.