▎ 摘　　要

NOVELTY - Preparing calcium stannate nano-particle by sol-gel method comprises dissolving tin compound and calcium compound in liquid medium, adding complexing agent, drying and roasting. USE - The method is useful for preparing calcium stannate nano-particle by sol-gel method, which is useful for manufacturing electrode to prepare hydrogen peroxide. ADVANTAGE - The electrode produces hydrogen peroxide by electrochemical oxidation of water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) manufacturing electrode, comprising: (i) mixing calcium stannate nano-particle, conductive agent and adhesive to form slurry, (or) mixing calcium stannate nano-particle, conductive agent, adhesive and solvent to form slurry, and (ii) coating slurry on conductive substrate; (2) calcium stannate nano-particle, prepared by above method; (3) electrode, comprising conductive substrate and active material i.e. calcium stannate nano-particle that is coated on conductive substrate; and (4) electrode box body, comprising multiple electrodes.