Jülide Hazal Türkcan - Department of Metallurgical and Materials Engineering, Yildiz Technical University, Esenler, ۳۴۲۱۰, Istanbul, Turkey
Kadir Sağir - Department of Materials Science and Technology, Turkish-German University, Istanbul, ۳۴۸۲۰, Turkey
Öğuz Ozdemir - Department of Metallurgical and Materials Engineering, Yildiz Technical University, Esenler, ۳۴۲۱۰, Istanbul, Turkey

Since it can be obtained from renewable sources and has a high heat value, hydrogen is a promising energy source. Chemical hydrides, such as sodium borohydride (NaBH۴), is used as hydrogen resources. This is due to their relatively high hydrogen content together with their recyclability. In this study, Ni-B catalysts with Ti addition were prepared for the hydrolysis reaction of NaBH۴. In the preparation of Ni-Ti-B catalysts, the chemical reduction technique was used. NiCl۲ salt was used as the Ni source, where TiCl۳ salt was preferred as the Ti source as the variations of the catalyst activities were determined. With the evaluation of the results, subsequent studies were carried out with the most effective Ti metal salt concentration. The effect of catalysts in different Ti/(Ni+Ti) molar ratios was examined according to the temperature, catalyst loading amount, NaBH۴, and NaOH concentrations. The microstructure and elemental analysis of each catalyst were explained by SEMEDS. After determining the highest performance Ti/(Ni+Ti) molar ratio, the calcination process was performed at different temperatures. For Ni-B catalysts, ۵ wt. % NaOH and ۵ wt. % NaBH۴ were determined as the optimum fuel composition. Moreover, the Ti doped catalysts demonstrated longer durability and hydrogen production rate for hydrolysis of NaBH۴.

Nickel titanium boride, Sodium borohydride, Ternary catalyst, Hydrogen generation