Hydrogen Generation by Hydrolysis of NaBH4 with Co─B/Sepiolite and Co─B/γ‐Al2O3 Catalysts

OpenAlex İngilizce

ABSTRACT Hydrogen generation through the hydrolysis of sodium borohydride (NaBH 4 ) has attracted significant attention as a clean and efficient energy source because of its high hydrogen storage capacity and environmental compatibility. In this context, developing cost‐effective and highly active catalysts is crucial for enhancing hydrogen production rates and practical applicability. Co─B catalysts using sepiolite and γ‐Al 2 O 3 as support materials were synthesized by impregnation and chemical reduction methods. The structures of the catalysts were characterized by x‐ray diffraction, scanning electron microscopy, N 2 adsorption‐desorption analysis, x‐ray fluorescence analysis, x‐ray photoelectron spectroscopy, and Fourier‐transform infrared spectroscopy. The catalytic activities of the Co─B catalysts for the hydrolysis of NaBH 4 were investigated. A batch system was used to study the impacts of reaction parameters such as catalyst amount, NaBH 4 concentration, NaOH concentration, and reaction temperature. Understanding how various support materials influence catalytic performance is essential for optimizing catalyst design and improving hydrogen generation efficiency. It was found that the catalyst support material strongly affected the hydrolysis reaction rates. The activation energies for the Co─B/Sepiolite and Co─B/γ‐Al 2 O 3 catalyst samples were 44.93, and 57.88 kJ mol −1 , respectively. These findings offer valuable insights for designing supported Co─B catalysts in sustainable hydrogen production systems.