In the present work, the electrochemical reduction of carbon dioxide to oxalic acid at a polycrystalline palladium electrode by application of a square wave potential regime has been demonstrated. The potential regime comprised a square wave with -1.0 and 0.4 V lower and upper potential limits, respectively, with a 100 Hz frequency. The electroreduction of CO2 was conducted at ambient conditions in a 0.10 M KClO4 solution for four hours. The product was analyzed by cyclic voltammetry at platinum and gold electrodes, UV-VIS spectrometry, infrared spectroscopy, NMR, GC-MS, HPLC and thermogravimetry. The results provide sufficient evidence that the product upon application of a square wave potential regime to a palladium electrode in a carbon dioxide-saturated 1.0 M KClO4 solution was oxalic acid.