The change in temperature shifts the TDI and TDTS of the catalytic cycle, with an inflection temperature being at 498 K. Experimentally, the Arrhenius plot for ammonia synthesis (Figure ) locates this inflection point around 523 K. In addition, all measured kinetic parameters for ternary hydride catalyst (Li4RuH6/MgO) are temperature-dependent (Figure ), indicating the complex temperature-dependent switching of rate-determining states (i.e. TDI and TDTS).