▎ 摘　　要

NOVELTY - Catalyst comprises metal nanoparticles and carbon support supporting metal nanoparticles. USE - The catalyst is useful for carbondioxide conversion (claimed). ADVANTAGE - The catalyst effectively lowers the activation energy of the carbondioxide conversion reaction to reduce overpotential and increases electrical efficiency of the reaction. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing catalyst for carbondioxide conversion comprising (A) preparing metal precursor solution by dissolving metal precursor in alcohol-based solvent and performing primary heat treatment, (B) preparing carbon support solution by mixing carbon support with alcohol-based solvent and then dispersing with ultrasonic waves, (C) mixing carbon support solution and metal precursor solution to form mixed solution and performing secondary heat treatment and (D) filtering and drying secondary mixed solution; and electrochemical carbondioxide conversion comprising working electrode containing catalyst for converting carbondioxide, reference electrode, counter electrode and electrolyte solution.