Electrolyzed water catalyst and preparation method thereof

The invention belongs to the technical field of electrochemistry, and particularly relates to an electrolyzed water catalyst and a preparation method thereof. The water electrolysis catalyst comprises a substrate and bimetals loaded on the substrate, the substrate is IrO2, the bimetals loaded on the substrate are Fe and Cu, the molar ratio of the IrO2 to the bimetals is (1: 20)-(1: 5), and the atomic ratio of Fe/Cu is (1: 10)-(10: 1). The water electrolysis catalyst provided by the invention adopts IrO2 as a noble metal loading matrix, has good electrochemical activity, and has excellent acid and alkali resistance, so that the durability of the catalyst is improved; a colloid method is adopted, the pH is adjusted, in a certain reaction temperature environment, Fe and Cu are introduced to replace the position of part of Ir, the electronic structure of IrO2 is changed, defects are introduced as active sites to promote an electro-catalytic reaction, transition bimetal Fe and Cu uniformly crystallize and grow on