Activated carbon assisted for ammonium borohydride hydrolysis synthesis of metal catalysts

In this thesis, activated carbon (C) was produced from coffee grounds and it was aimed to increase the catalytic activity by attaching Ni-Fe-B and Cu-Mo-B catalysts to this activated carbon. Thus, heterogeneous catalysts with high catalytic activity have been produced for the hydrolysis of ammonia borane, which has recently been shown as the most promising chemical hydrogen storage material. First, activated carbon was synthesized by chemical activation method using phosphoric acid activator in microwave. In activated carbon synthesis, the effects of the parameters of microwave gas environment, microwave power, microwave time, activation temperature, activation time and impragnation rate were investigated. Identification of the obtained activated carbon and catalysts was carried out using advanced analytical methods such as N2-adsorption-desorption, SEM, EDX, XRD, IR and XPS. In the hydrolysis experiments of ammonia borane, the effects of NaOH concentration, NH3BH3 concentration, catalyst amount and ambient temperature parameters were investigated. In addition, using the data obtained from experiments conducted at different temperatures, reaction degrees and activation energies were determined by kinetic studies.