Green and low-cost energy production is an important matter in today society because fossil fuels are running low and burning them is not an efficient process. Therefore, low temperature fuel cells arise as a promising technology, e.g. direct ethanol fuel cells (DEFCs) and direct formic acid fuel cells (DFAFCs). Palladium (Pd) has proven to be an excellent catalyst in the formic acid oxidation reaction (FAOR) and further investigation of methods for its’ synthesis at nanoscale is needed. Several studies have been performed on Pd and other metal nanoparticles (NPs) synthetized from aqueous media and deep eutectic solvents (DESs). The advantage of synthesizing NPs by electrodeposition from DESs over aqueous media is the diminution of oxygen or hydrogen evolution reaction. Thus, the aim of this investigation is to electrodeposit Pd NPs onto glassy carbon (GC) from ethaline and find out their relation to size and morphology to the applied potential. Hence, how these affect the efficiency of the DFAOR. Pd electrodeposition was obtained by chronoamperometry (CA), as shown in Figure 1B. The potentials were set according to the cathodic peak in the cyclic voltammetry (CV), see Figure 1A. All experiments were performed at 25 °C on ethaline media. In both cases, GC was used as the working electrode, silver and platinum wires were used as reference and counter electrodes, respectively. Electrodeposits were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray (EDS) analysis. Furthermore, the Pd electrochemical response was measured by CV to obtain the electroactive area with carbon monoxide. FAOR was conducted by CV and tested by CA over 20 minutes.