▎ 摘　　要

NOVELTY - Preparing platinum-rhodium alloy involves reacting a solution I containing a platinum metal precursor, a rhodium metal precursor, a reducing agent, and a surfactant to obtain a platinum-rhodium alloy; the reducing agent is selected from ascorbic acid; the surfactant is selected from 1-octadecene. USE - Method for preparing platinum-rhodium alloy as electrocatalyst (cliamed). ADVANTAGE - The prepared catalyst has high alloying degree, has high catalytic activity and ultra-high catalytic stability, and has good application prospect. DETAILED DESCRIPTION - Independent claim included for 1. Preparation method of platinum-rhodium alloy catalyst, wherein the preparation method comprises the following steps: (S1) the platinum metal precursor, rhodium metal precursor, reduction of the agent I surface active agent, obtaining the platinum rhodium alloy; (S2) loading the platinum-rhodium alloy on the carbon carrier, obtaining the platinum-rhodium alloy catalyst.