Akademik Veri Yönetim Sistemi
Materials Chemistry and Physics, cilt.339, 2025 (SCI-Expanded)
Among different technologies, hydrogen production from boronhydride species appears to be advantageous for fuel cells. Sodium borohydride has several advantages as a hydrogen source. It is non-flammable, stable, and capable of producing pure hydrogen at room temperature. However, the use of a catalyst is necessary for hydrogen production with NaBH4. Metal-free catalysts have gained interest due to their environmental friendliness, low cost, and high activity. In this research, poplar sawdust-activated carbon was produced using the chemical activation method. Subsequently, the activated carbon was combined with ZSM5 zeolite through the sol-gel method to form a composite structure. These composite catalysts, varying in their ratios of activated carbon and ZSM5, were then evaluated for their catalytic activities in the NaBH4 methanolysis. The findings revealed that the AC/ZSM5 composite with a 99:1 ratio exhibited the highest hydrogen generation rate (HGR) value among the tested ratios. After identifying the catalyst, we conducted kinetic studies to determine the optimal reaction conditions. We tested different methanol concentrations, catalyst amounts, and NaBH4 amounts to find the best conditions. We achieved an HGR value of 32116 mL/min.gcat under these optimal conditions. The synthesized catalyst was then characterized using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffractometer (XRD), and field emission scanning electron microscopy (FE-SEM).