Uygun Batgi, SibelYapıcı, BurakGökdoğan Şahin, Özlem2024-11-102024-11-1020240361-52351543-186Xhttps://doi.org/10.1007/s11664-024-11453-7https://hdl.handle.net/20.500.13091/6553Over the past ten years, sodium borohydride (NaBH4) has drawn attention due to the great usage of NaBH4 in energy systems. It can be directly oxidized in a direct borohydride fuel cell (DBFC) or it can produce hydrogen on demand. In this study, catalysts of Pt and PtAu supported on carbon nanotubes (CNT) were prepared using a NaBH4 reduction process to explore the electro-oxidation of NaBH4. The characterization of the catalysts has been performed by x-ray diffraction (XRD) and transmission electron microscopy (TEM). The produced catalysts were about 4 nm in size and shared a similar particle shape. Cyclic voltammetry, linear sweep voltammetry, chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements were evaluated for borohydride electro-oxidation. The experimental conditions were optimized by cyclic voltammetry for BH4- electro-oxidation on PtAu (70:30)/CNT. The EIS and CA results were in a good agreement with the cyclic voltammetry results in terms of electrocatalytic activity and stability of the PtAu/CNT, Au/CNT, and Pt/CNT catalysts. The improved performance of BH4- electro-oxidation can be ascribed to the complementary actions of CNT-supported Pt and Au particles, which improve catalyst contact and usage. These findings imply that the PtAu (70:30)/CNT catalyst is a viable anode catalyst for use in direct borohydride fuel cells.eninfo:eu-repo/semantics/closedAccessDirect borohydride fuel cellsborohydride electro-oxidationCNTs supportbimetallic catalystsplatinumHydrogen-ProductionSodium-BorohydrideAnode CatalystsFuel-CellsOxidationPerformancePdElectrodesPlatinumNiArticle10.1007/s11664-024-11453-72-s2.0-85205081489