Akademik Veri Yönetim Sistemi
ACS Omega, cilt.10, sa.30, ss.32987-32997, 2025 (SCI-Expanded)
In this study, palladium (Pd), ruthenium (Ru), and cobalt (Co) nanoparticles (NP) supported on activated carbon (AC) (denoted as PdRu/AC@1% Co) were successfully synthesized via the impregnation–reduction method. The structural and surface characteristics of the catalyst were thoroughly analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). The catalytic performance of PdRu/AC@1% Co with different atomic ratios was evaluated for hydrogen generation through the hydrolysis of ammonia borane (NH3BH3, AB). Compared to monometallic (Pd) and bimetallic (PdRu) systems, the trimetallic PdRu@Co catalyst exhibited significantly enhanced catalytic activity, even at low temperatures. Under optimized conditions (1 mmol of AB, 50 mg of catalyst, 25 °C), the highest turnover frequency (TOF) value of 312.8 (molH2)/(molcat·min) was achieved. The activation parameters for the hydrolysis reaction were calculated as activation energy (Ea) = 19.6 kJ/mol, enthalpy change (ΔH#) = 17.12 kJ/mol, and entropy change (ΔS#) = −184.85 J/(mol·K). These findings suggest that PdRu/AC@1% Co is a highly efficient and reusable catalyst, making it a promising candidate for practical hydrogen production from AB.