▎ 摘　　要

NOVELTY - A particle catalyst for filling three-dimensional electrodes comprises aluminum oxide particle electrode and tin dioxide loaded on the aluminum oxide particle electrode and modified by graphene, where the mass ratio of the aluminum oxide particle electrode and tin dioxide is (9-12):1; and the mass ratio of graphene and tin dioxide is (0.1-2.5):1000. USE - As particle electrode catalyst filling used in three-dimensional electrodes (claimed). ADVANTAGE - The catalyst filling is stable, its electrocatalysis efficiency is high, it can be used repeatedly, as compared to particle electrode catalyst. The preparation method of catalyst filling is simple, it needs low manufacture cost, it is easy to popularize. The catalyst filling does not use strong oxidant in the modifying process of the graphene and reducing agent, thus it is nontoxic and harmless to the environment, and it will not cause secondary pollution. When particle electrode catalyst filling is used with the two-dimensional electrode to obtain three-dimensional particle electrode, it greatly increases the reaction area of the electrode, and the electrode reaction speed. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing a three-dimensional electrode involving: pre-treating the aluminum oxide particle electrode; preparing graphene-tin tetrachloride sol; and preparing particle electrode catalyst filling by mixing the aluminum oxide particle electrode pre-treated in step 1) and the graphene-tin tetrachloride sol in step 2) according to the mass ratio of 3:(1-12), uniformly stirring by the constant temperature magnetic heating stirrer, standing and maturing for 10-18 hours, then centrifugally separating by a centrifuge, drying the solid obtained by centrifuging at 80-90 degrees C, then placing the dried solid in a muffle furnace, roasting at 400-600 degrees C for 2-4 hours, cooling in the furnace, and obtaining the particle electrode catalyst filling of three-dimensional electrodes.