Gamze BOZKURT, Abdulkadir ÖZER, Ayşe BAYRAKÇEKEN YURTCAN

Preparation of different thin film catalysts by direct current magnetron sputtering for hydrogen generation

In this study, thin films of Co, Ni, Pd, and Pt were prepared on $Co_3O_4$ support material in pellet form using the direct current (DC) magnetron sputtering method for use as catalysts for hydrogen generation from $NaBH_4$ .Characterization of the catalysts was carried out using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). According to cross-sectional SEM images, catalyst thicknesses were observed in the range of approximately 115.3–495.8 nm. The particle sizes were approximately 25.0, 21.4, 33.9, and 9.5 nm for $Ni-Co_3O_4, Co-Co_3O_4, Pd-Co_3O_4, and Pt-Co_3O_4$ catalysts, respectively. The increase in NaOH initial concentration provides an increase in the rate of hydrogen generation for Co, Ni, and Pd catalysts. A maximum hydrogen generation rate of 1653 $mL/g_{cat}. min$ was obtained for the $Pt-Co_3O_4$ catalyst.

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