▎ 摘　　要

NOVELTY - Preparation of palladium carbon nano-catalyst involves dispersing carbon carrier in alcohol solution of 2-5C and adjusting pH of the solution to 9-12, dissolving the palladium precursor in the alcohol solution of 2-5C, dripping alcohol solution of palladium precursor to the alcohol solution of carbon carrier under stirring, stirring for 2-10 hours under room temperature, filtering, washing with water, drying and grinding to obtain powdered palladium oxide/carbon catalyst precursor, and reducing the powdered catalyst precursor and activating at low temperature in reducing atmosphere. USE - Preparation of palladium carbon nano-catalyst used in fuel cell, electrochemical sensor and metal-air cell (all claimed). ADVANTAGE - The catalyst has high activity.