Fig. 7. (a) Initial reaction rates vs. initial concentration of HPA-Nbred, HPA-Tared, and HPA-MOred catalysts at 120 °C and Arrhenius plot for the reoxidation of HPA-Nbred, HPA-Tared, HPA-MOred catalysts. Reaction conditions: 80–140 °C, 5 bar synthetic air saturation, 1.8–12 μM pre-reduced HPA-Nb, HPA-Ta, HPA-MO initial concentration, LCWM reactor (see eqn (4) and (5) and Arrhenius plot in (b)).
