Study on the anode catalytic performance of graphenepolyaniline composites on direct methanol fuel cells

Abstract

Abstract The aim of this study is to develop a noble metal dispersion-free anodic catalyst for one-step electrochemical synthesis of graphene/polyaniline (GP) composites using a mixture of graphene suspension and aniline monomer as the precursor by the potentiostat method. UV-vis (UV-VIS) spectroscopy and FT-IR (FT-IR) spectroscopy were used to characterize the structure of polyaniline (PANI) and GP. Cyclic voltammetry (CV) was used to test the electrochemical properties and electrocatalytic properties of polyaniline (PANI) and GP for methanol oxidation. The characterization results proved that the GP composite was successfully synthesized. The CV test curve showed that the electrochemical performance of the GP composite was significantly higher than that of PANI, with a larger specific capacity, which proved that the synergistic effect of the two composites was better played by the composite. However, the catalytic performance test for methanol oxidation showed that. The graphene/polyaniline (GP) composite has little catalytic effect on methanol oxidation.