The characterization of nickel,iron and platinum modified carbon felt electrodes and investigation of their catalyc effect on hyrogen gas production

In this study, Ni, NiFe and Pt were electrochemically deposited on a large surface area carbon felt for different periods of time, and hydrogen gas production in a basic medium was investigated. The prepared electrodes were characterized by using electrochemical impedance spectroscopy (EIS), linear scanning voltammetry (LSV), potentiodynamic polarization, cyclic voltammetry (CV), scanning electron microscopy (SEM) and X-ray diffraction methods. In addition, hydrogen gas volume was measured by applying the electrolysis process to the electrodes prepared in 1.0 M KOH. It was observed that the most effective Ni deposition time on carbon felt was 20 minutes. In order to increase the catalytic effect of the C felt electrode (C#Ni20) coated with Ni for 20 minutes, Ni and Fe were precipitated together at different times. The effective precipitation time for Ni and Fe co-deposition on C#Ni20 was determined as 10 minutes. Finally, a small amount of Pt metal was deposited on the C#Ni20NiFe10 electrode. The electrode with the highest catalytic effect on hydrogen production was the C#Ni20NiFe10@Pt45 electrode with 45 s Pt precipitation