▎ 摘　　要

NOVELTY - Preparation of porous graphene nanowires involves dissolving magnesium-containing compound to obtain solution containing magnesium ions, performing hydrothermal reaction to obtain a catalyst, calcining at 300-600 degrees C to obtain a porous catalyst, introducing carbon source into the porous catalyst at 600-1200 degrees C, and dissolving the obtained porous graphene nanowires catalyst with acid to remove porous catalyst. The concentration of magnesium ion is 0.01-5 mol/L. USE - Preparation of porous graphene nanowires used as electrochemical energy storage material, catalyst support material, adsorbent material and desorption material (all claimed). ADVANTAGE - The method enables simple preparation of porous graphene nanowires.