Chika Shafa Maura, Akrajas Ali Umar, Suci Winarsih, Setia Budi
Platinum (Pt) is widely used as an electrocatalyst in fuel cells due to its high catalytic activity. However, its high cost and susceptibility to poisoning limit its practical applications. To overcome these limitations, trimetallic catalysts such as PtSnNi offer improved catalytic performance through synergistic effects. Tin (Sn) enhances ethanol electrooxidation (EOR) by modifying the electronic structure of Pt and facilitating oxygen-containing species adsorption. Nickel (Ni), when combined with Sn, promotes C-C bond cleavage and CO desorption from the Pt surface. In this study, PtSnNi electrocatalysts were synthesized on a Cu substrate via potentiostatic electrodeposition. The resulting catalysts were characterized using SEM, EDX, and XRD, while electrochemical performance was evaluated via EIS, CV, LSV, and CA. The deposited PtSnNi formed cluster-like structures with partial agglomeration and an average particle size of 337.33 nm. EDX confirmed elemental compositions of Pt (70.31%), Sn (28.85%), and Ni (0.84%), and XRD revealed a hexagonal crystal structure. The catalyst demonstrated excellent electrochemical properties with a low charge transfer resistance (4.94 ω), high catalytic activity (29.66 mA/cm2), a Tafel slope of 140 mV/dec, and good long-term stability. These results confirm the potential of PtSnNi as a promising electrocatalyst for ethanol electrooxidation. © Published under licence by IOP Publishing Ltd.
The Center for Science Innovation, Arva Building Jl. RP. Soeroso, Jakarta Pusat, 10350, Indonesia; Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Selangor, 43600, Malaysia; Research Center for Quantum Physic, National Research and Innovation Agency (BRIN), South Tangerang 15314, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta Timur, 13220, Indonesia
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