It is the first study to synthesize Co(II)-Schiff Base complex and to use it like a catalyst for potassium borohydride hydrolysis reaction to hydrogen production. Co(II)-complex is synthesized with CoCl2 center dot 6H(2)O and 5-Amino-2,4-dichlorophenol-3,5-di-tert-butylsalisylaldimine ligand. KBH4 hydrolysis reaction is studied according as percentage of KBH4, percentage of KOH, amount of Co-Schiff Base complex catalyst and temperature effects. Co Schiff Base complex is highly effective catalyst and initial rates (R-o) of KBH4 hydrolysis reaction were 61220.00 and 99746.67 mL H-2. g(-1) cat. min(-1) at 30 degrees C and 50 degrees C. Furthermore this study includes the kinetic calculations and for this reaction calculated activation energy is 17.56 kJ mol(-1). (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.