NOVELTY - Autocatalytic plating of carbon nanomaterial is performed by providing carbon nanomaterial in oxidizing solution containing greater than or equal to 2 oxidizing agents while maintaining within 1st temperature range, stirring solution for 1st predetermined time period, heating solution to reach 2nd temperature range higher than 1st temperature range, stirring solution for 2nd predetermined time period shorter than 1st time period while maintaining solution within 2nd temperature range, removing nanomaterial from oxidizing solution, and dispersing nanomaterial in aqueous sensitizing solution.    USE - Autocatalytic plating of carbon nanomaterial for catalysts used for improved fuel cell electrodes.    ADVANTAGE - Carbon nanomaterial having well defined and homogeneous metal coating is provided without damaging the structure of the nanomaterial.    DETAILED DESCRIPTION - Autocatalytic plating of carbon nanomaterial is performed by providing carbon nanomaterial in oxidizing solution containing greater than or equal to 2 oxidizing agents while maintaining within 1st temperature range, stirring solution for 1st predetermined time period, heating solution to reach 2nd temperature range higher than 1st temperature range, stirring solution for 2nd predetermined time period shorter than 1st time period while maintaining solution within 2nd temperature range, removing nanomaterial from oxidizing solution, dispersing nanomaterial in aqueous sensitizing solution containing sensitizing agent, removing nanomaterial from sensitizing solution, immersing nanomaterial in seed mixture containing seed particles adhering to nanomaterial, removing nanomaterial from seed mixture, plating nanomaterial by immersing nanomaterial in plating solution containing aqueous metal source and 1st aqueous reducing agent such that metallic layer is grown on nanomaterial from seed particles, removing nanomaterial from plating solution, dispersing nanomaterial in aqueous solution containing 2nd reducing agent, heating solution to reach 3rd temperature range, and performing ultrasonic treatment of heated solution for 3rd predetermined time period while maintaining solution within 3rd temperature range.