Ecer, UmitYilmaz, SakirUlas, BerdanKaya, Sefika2025-05-102025-05-1020241011-372X1572-879X10.1007/s10562-024-04727-62-s2.0-85194706781https://doi.org/10.1007/s10562-024-04727-6https://hdl.handle.net/20.500.14720/10713Ulas, Berdan/0000-0003-0650-0316; Yilmaz, Sakir/0000-0001-9797-0959; Ecer, Umit/0000-0002-1824-982XIn this study, activated carbon (AC) obtained from waste hazelnut shell and halloysite nanotube (HNT) were used to prepare HNT-AC support material by hydrothermal method. CoNi/HNT-AC catalyst was synthesized by reducing Co and Ni on HNT-AC by chemical reduction method. CoNi/HNT-AC has been characterized using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N-2 adsorption-desorption, elemental mapping, and transmission electron microscopy (TEM) methods. The optimum reaction conditions for hydrogen generation through NaBH4 hydrolysis on CoNi/HNT-AC catalyst were determined using response surface methodology (RSM). The proposed quadratic model for NaBH4 hydrolysis on CoNi/HNT-AC was found to be statistically significant with a correlation coefficient of 0.96. Under the optimum reaction conditions of 40.76 mg catalyst, 0.18 M NaBH4, and 8.64 wt% NaOH, the hydrogen generation rate (HGR) and activation energy (E-a) were obtained as 1114.16 mL/gcat. min. and 24.15 kj/mol, respectively.eninfo:eu-repo/semantics/closedAccessHydrogen ProductionOptimizationResponse Surface MethodologyHalloysite NanotubeActivated CarbonHazelnut ShellArticle15410Q3Q354725486WOS:001236057200004