چكيده به لاتين
The set of various factors including the limitation of fossil resources, negative environmental impacts, the use of hydrocarbon resources, rising prices of fossil fuels, political conflicts and their effects on sustainable energy supply are among the reasons many politicians and experts in the subject of energy and the environment have pushed for the creation of a new security-based energy infrastructure, environmental protection, and energy efficiency improvements. Accordingly, hydrogen is one of the best options for the role of energy carrier in this new energy supply system. One method for producing hydrogen gas, Hydrogen production from hydrogen (electrolysis) has become available as one of the ingredients in the production of hydrogen gas. In this research, for the production of electrochemical hydrogen, for the first time, the cobalt oxide-shaped needle structures were grown directly on carbon fiber (CC) by using of hydrothermal method. Then, the electrochemical indication of palladium particles was performed on cobalt oxide-shaped structures by cyclic voltammetry (CV). The results of these experiments were evaluated by linear voltammetry (LSV), chronoamperometry, electrochemical impedance spectroscopy (EIS) and CV. The structure and morphology of this composite were determined by using of spectroscopic X-ray diffraction (XRD), X-ray diffraction spectroscopy (EDX) and scanning electron microscopy (SEM). The induction plasma (ICP) method was also used to investigate the palladium concentration indicated on cobalt oxide structures. The proposed palladium-cobalt oxide / CC (Pd-Co3O4 / CC) electrode was used to electrochemical hydrogen production in acidic media. The catalytic activity of this proposed electrode was compared with CC, Pd / CC, Pd / CC and Co / OC / Co (Co3O4 / CC) electrodes. The results showed that the PdCo3O4 / CC electrode has the best catalytic activity for hydrogen electrochemical production (HER) in an acidic environment. The HER performance in the electrodes investigated is Pd-Co3O4 / CC> Pd / CC> Co3O4 / CC> CC. From the results obtained, it can be concluded that Pd and Co3O4 have a synergistic effect, and Co3O4 can improve the performance of HER of catalyst palladium. According to the results, the proposed electrode in this study can be an efficient and inexpensive cathode with a very high hydrogen production capacity.
Keywords: Electrochemical production of hydrogen, CC, cobalt oxide, palladium
