▎ 摘　　要

NOVELTY - A high-performance oxygen reduction manganese oxide catalyst composite comprises manganese oxide nanoparticles and nitride nanoparticles common loaded in the three-dimensional porous N-doped graphene composition. USE - High-performance oxygen reduction manganese oxide catalyst composite for use in fuel cell (claimed). ADVANTAGE - The catalyst composite has high activity and good stability, better overall performance, and good prospects, and can be prepared in simple, easy and cost effective manner. DETAILED DESCRIPTION - A high-performance oxygen reduction manganese oxide catalyst composite (MnOx/Mn2N-N-C) comprises manganese oxide nanoparticles and nitride nanoparticles (Mn2N) common loaded in the three-dimensional porous N-doped graphene composition, where x is not defined. An INDEPENDENT CLAIM is also included for a method for preparing high-performance oxygen reduction manganese oxide catalyst composite.