One step synthesis of PtNi electrocatalyst for methanol oxidation

摘要

Development of new direct methanol fuel cell catalyst is a hot topic of current research. In this article, we adopted a simple method of synthesizing a PtNi alloy catalyst in one step at room temperature. In order to study the optimum proportion of platinum salt and nickel salt in the experiment by changing the molar ratio of platinum and nickel in the solution, five different proportions of PtNi alloy catalysts were obtained. The successful synthesis of PtNi alloy catalyst was proved by XRD and other characterization methods. The electrochemical properties of the above electrocatalysts were investigated using CV, LSV and other testing methods. The results show that PtNi-4 alloy catalyst exhibits excellent catalytic activity in both methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) tests, and their initial potential and current density are similar to commercial Pt/C catalysts in ORR. In summary, the prepared PtNi-4 alloy catalyst can be used as an anode or cathode catalyst in direct methanol fuel cells.