Due to widespread water pollution with nitrate ion, methods to remove or lower the nitrate concentrations in water are needed. A novel route to reproducibly electro-deposit copper nano-films, with no need for additional treatments or additives, from acidic media onto fluorine-doped tin oxide/glass ([email protected]) is described. The films involve elemental copper nanoparticles inside copper agglomerates of larger sizes. Within 2 h, at ambient potential (-1.8 V), the [email protected] electrode reduces aqueous nitrate ions (~40%) more effectively than the benchmark bare Cu metal sheet (~11%). The [email protected] is also more selective to N2 production (~30%) compared to bare Cu sheet with only (~1.1%). Furthermore, the [email protected] effectively functions for 7 h and continues to bring down the nitrate ion concentration from 200 ppm to acceptable levels (less than 60 ppm), reproducibly in 5 attempts. The results are promising for future water de-nitration processes using easy-to-prepare [email protected] electrodes, aiming at producing electrodes for continuous flow reactors at larger scale.