Catalyst as well as preparation method and application thereof

The invention relates to a catalyst and a preparation method and application thereof, and belongs to the technical field of fuel cells. The catalyst comprises a carbon carrier and catalytic particles, the carbon carrier has a mesoporous structure, the catalytic particles are distributed on the carbon carrier, and the catalytic particles comprise Pt-Fe alloy; compared with a Pt/C catalyst, the catalyst composed of the Pt-Fe alloy nanoparticles composed of dispersed Pt and thin-layer Fe has higher catalytic performance and lower attenuation rate. 本申请涉及一种催化剂及其制备方法和应用，属于燃料电池技术领域；该催化剂包括碳载体和催化微粒，所述碳载体具有介孔结构，所述催化微粒分布于所述碳载体，所述催化微粒包括Pt-Fe合金；由分散的Pt和薄层Fe组成Pt-Fe合金纳米颗粒组成的催化剂，相比于Pt/C催化剂具有更高的催化性能，同时具有更低的衰减率。