Phosphorus-doped LaCoO3 bifunctional catalyst, and preparation method and application thereof

The invention relates to a phosphorus-doped LaCoO3 bifunctional catalyst, and a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing a LaCoO3 perovskite material with red phosphorus, and carrying out high-energy ball milling in an inert atmosphere so as to obtain a phosphorus-doped LaCoO3 perovskite material; and S2, adding a dispersant intothe phosphorus-doped LaCoO3 perovskite material, and carrying out ball milling and drying so as to obtain the phosphorus-doped LaCoO3 bifunctional catalyst. According to the invention, the high-energyball milling method is employed, and elemental oxygen in LaCoO3 is replaced through phosphorus doping, so the prepared phosphorus-doped LaCoO3 bifunctional catalyst has uniformly distributed elementary phosphorus, fine crystal grain and large specific surface area, is greatly improved in catalytic activity in an alkaline solution, shows excellent ORR and OER catalytic performance and high stability, and has great applicat