▎ 摘　　要

NOVELTY - Preparing copper-based imidazole electro catalyst involves (a) selecting and weighing copper salt and metal-organic framework (MOF) ligand, and mixing 1, 3-bis (1-imidazole) propane with Cu: bip: MOF in ratio of (1-1.5): 1: 1, uniformly mixing to obtain a mixture, where the MOF ligand is trimesic acid or isophthalic acid, (b) measuring and mixing N, N-dimethylacetamide with distilled water in ratio of 1-1.2: 1 as solution A, (c) adding the solution A into the mixture, adding 8.5-9.0 mg 1, 3-bis (1-imidazole) propane into the solution A per milliliter of the solution A, and fully and uniformly mixing the solution A to obtain solution B, and (d) reacting the solution B at 95-105℃ for 72 hours, followed by filtering, washing and drying to obtain blue catalyst powder crystals, e.g. modified Cu-bip-MOF catalyst. USE - Method for preparing copper-based imidazole electro catalyst for removing nitrate in wastewater. ADVANTAGE - The catalyst has the nitrate conversion rate of over 75 % under the voltage of (-)1.2 voly (uses Ag/AgCl as a reference electrode), and the preparation method is cost-effective, simpler synthesis and industrialized scale-up application, and has industrial production prospect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing electrode by using the modified Cu-bip-MOF catalyst, which involves: weighing a modified Cu-bip-MOF catalyst and carbon conductive powder, wherein the mass ratio of the modified Cu-bip-MOF catalyst to the carbon conductive powder is (1-1.5): 1; preparing an organic solvent as a solution A; adding a binder into the solution A, where the addition amount of the binder is 1 vol.% solution A to obtain solution B; adding the modified Cu-bip-MOF catalyst and the carbon conductive powder into the liquid B for mixing, adding 2-2.5 mg modified Cu-bip-MOF catalyst into 1 mL liquid B, uniformly mixing, and fully dispersing to obtain a mixed suspension; uniformly dripping the mixed suspension on two surfaces of a cathode sheet, to obtain an electrode loaded with the modified Cu-bip-MOF catalyst, where the area of the cathode sheet is controlled to be 1 cm2 loaded with 0.33-1.33 mg modified Cu-bip-MOF catalyst.