o:5231 A novel two-step electrochemical deposition method for Sn-Pd electrocatalyst synthesis for a potential application in direct ethanol fuel cells en Abstract: Sn-Pd electrocatalysts with a constant atomic ratio of 60 at.% Sn‒40 at.% Pd suitable for potential application in direct ethanol fuel cells were synthesized using a novel two-step electrodeposition method. First, Sn was electrodeposited in various forms of dendrites, from spear-like and needle-like to individual fern-like dendrites to a network of intertwined fern-like dendrites, by varying the cathodic potential and then performing electrodeposition of Pd at a constant current density in the second step. A morphological and elemental analysis of Sn and Sn-Pd electrocatalysts was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) techniques, while the size of Sn dendrites was analyzed using the particle size distribution (PSD) method. Cyclic voltammetry (CV) and chronoamperometry were applied in order to study the catalytic behavior of Sn-Pd electrocatalysts in the ethanol oxidation reaction (EOR), while CO stripping was used to estimate the antipoisoning capability of the electrocatalysts. The Sn surface morphology of the sub-layer was highly correlated with the electrocatalytic activity of the examined Sn-Pd electrocatalysts. The high activity it presented towards the EOR showed the suitability of the Sn-Pd electrocatalyst constructed from individual fern-like Sn dendrites as a sub-layer. Compared to Pd alone, this Sn-Pd catalyst showed more than 3 times higher activity and improved EOR kinetics. This enhancement in the catalytic activity of the Sn-Pd electrocatalysts is attributed to both the morphological characteristics of Sn as a sub-layer and the bifunctional effect. Keywords: electrodeposition; tin; dendrites; Sn-Pd electrocatalysts; SEM; EDS; PSD; XPS; ethanol oxidation reaction. 1552099 10.3390/pr11010120 91552100 135689481 1552101 2227-9717 2024-08-20T12:29:05.307Z 44 no 46 Jelena Lović Institut za hemiju, tehnologiju i metalurgiju, Univerzitet u Beogradu 55920137 0000-0001-5956-8571 2023 46 Sanja Eraković Pantović Institut za hemiju, tehnologiju i metalurgiju, Univerzitet u Beogradu 68337929 0000-0003-1188-5177 2023 46 Lazar Rakočević Univerzitet u Beogradu, Institut za nuklearne nauke Vinča 107993097 0000-0001-6199-8087 2023 46 Nenad Ignjatović Institut tehničkih nauka SANU 13761127 0000-0002-5749-094X 2023 46 Silvana Dimitrijević Institut za rudarstvo i metalurgiju Bor 25647975 0000-0003-1670-4275 2023 46 Nebojša Nikolić Institut za hemiju, tehnologiju i metalurgiju, Univerzitet u Beogradu 14046567 0000-0002-6385-5714 2023 application/pdf 15149557 https://unilib.phaidrabg.rs/o:5231 no yes 16 70 544.653 92000001 71A03 Processes 11 120 1 17 2023