Preparation method and application of nickel-doped sludge substrate plate anode

The invention discloses a preparation method and application of a nickel-doped sludge-based plate anode, which comprises the following steps of: fully and uniformly mixing sludge dry powder, corn starch, sodium bicarbonate and nickel acetate according to a certain proportion, adding water to prepare paste, pressing the paste into blocky sludge in a mold, forming holes in two surfaces of the blocky sludge, and naturally airing the blocky sludge; and placing the aired sludge in a forced air drying oven for pre-oxidation at 220 DEG C, and then placing the sludge in a tubular furnace for high-temperature heat treatment in a nitrogen atmosphere to obtain the nickel-doped sludge-based plate electrode material. Under normal temperature and normal pressure, in a three-electrode system, a nickel-doped sludge substrate plate electrode is used as a working electrode, a saturated calomel electrode is used as a reference electrode, a platinum wire electrode is used as a counter electrode, air is blown from the bottom of a