PLATINUM-BASED ALLOY CATALYST AND PREPARATION METHOD THEREFOR, MEMBRANE ELECTRODE, AND FUEL CELL

摘要

The present invention relates to a platinum-based alloy catalyst, a preparation method therefor, a membrane electrode, and a fuel cell. The method for preparing a platinum-based alloy catalyst comprises the following steps: (1) preparing or providing nano-sized alloy particles of platinum and 3d transition metal; (2) subjecting the alloy particles prepared in step (1) to acid treatment; and (3) annealing the alloy particles treated in step (2). In the present invention, the size of the platinum-based alloy particles and the atomic ratio of the platinum to the transition metal in the platinum-based alloy are controlled, then the atomic ratio of the platinum to the transition metal is further controlled by combining the etching of the acid, and annealing is performed at a high temperature; according to the platinum-based alloy catalyst prepared thereby, the surface structure of the particles is improved, the loss of the transition metal in the working environment can be greatly prevented or even avoided, thereby improving the stability and durability of the platinum-based alloy catalyst, and great support is provided for the large-scale application of the platinum-based alloy catalyst in fuel cells.