“…The isothermal hydrogen desorption kinetics of Mg–2Ni/Ti 3 C 2 was further examined at various temperatures because it exhibited the best desorption properties. The Johnson–Mehl–Avrami–Kolmogorov (JMAK) formula eq and Arrhenius formula eq were utilized to calculate the hydrogen release activation energy ( E a ) of Mg–2Ni/Ti 3 C 2 , Mg–Ti 3 C 2 , Mg–Ni, and undoped Mg. where α represents the phase transformation fraction (in this work, α changes from 0.2 to 0.8), k is the temperature-dependent dynamics parameter, t is the reaction time, and η is the Avrami exponent. where T , R , k , and A are the reaction temperature, gas constant, reaction rate constant, and pre-exponential factor, respectively. The fitted findings showed that the dehydrogenation E a values of the Mg, Mg–Ni, Mg–Ti 3 C 2 , and Mg–2Ni/Ti 3 C 2 composites were 135.4, 77.6, 86.2, and 75.0 kJ mol –1 , respectively (Figures and S4).…”