(FeCo/Ppy@C): Pt-Free FeCo-Polypyrrole Nanocomposites Supported On Porous Carbon For Electrochemical Application

Francesca Fiorellino, Martina Pilloni, Andrea Ardu, Valentina Cabras, Stefano Columbu, Lisa Russo, Alessandra Scano, Guido Ennas
2019 Advanced Materials Letters  
The synthesis and characterization of pyrolyzed carbon-supported transition metal/nitrogen (M-Nx/C) material based on FeCo alloy and Polypyrrol as source of N atoms are presented. Two different synthetic protocols, a multi-step and a novel one pot single-step approach are compared. In both approaches two different Fe:Co ratio (50:50 and 75:25) were used to obtain Pt-free FeCo-Polypyrrole nanocomposites supported on porous carbon (FeCo/Ppy@C). Structural and morphological characterizations of
more » ... acterizations of the samples before and after pyrolysis were carried out by using X-Ray Powder Diffracion, Infrared Spectroscopy and High-Resolution Transmission Electron Microscopy. For both approaches, nanoparticles with a core shell structure but different size and matrix polidispersivity were observed after pyrolysis when a Fe:Co 50:50 ratio was used. Bigger nanoparticles were obtained after pyrolysis in the 75:25 ratio samples, with no significant differences between the two approaches. The electrocatalytical properties of the final samples, investigated by cyclic voltammetry in an acidic electrolyte, showed the presence of a cathodic current density.
doi:10.5185/amlett.2018.2203 fatcat:kthamw4dhvfk3d7notkfl4a7pe