▎ 摘　　要

NOVELTY - Two-dimensional coral sheet palladium nanocatalyst loaded by reducing graphene oxide has 300-100 nm particle size and 20-40 wt.% palladium loading amount two-dimensional coral sheet particle with branched pore structure. USE - Two-dimensional coral sheet palladium nanocatalyst loaded by reducing graphene oxide. ADVANTAGE - The catalyst provides more active sites and has simple preparation and higher catalytic activity in oxygen reduction reaction.