fig3

Figure 3. (A) Time on stream of CBN-Z0.4 in ODHP reactions; (B) Catalytic performance of h-BN, CBN and CBN-Zx in ODHP reactions; (C) Arrhenius plots and Ea values of CBN and CBN-Zx; (D) Propylene yield as a function of propane conversion over several typical B-based catalysts in ODHP reactions. Reaction conditions: 100 mg catalyst (apparent activation energy test: 40mg catalyst), 500 °C, 10 kPa C₃H₈, 15 kPa O₂, He balance total 25 mL·min^-1. CBN: Carbon-doped boron nitride; ODHP: oxidative dehydrogenation of propane; h-BN: hexagonal boron nitride; CBN-Zx: ZIF-8 derived carbon-doped boron nitride; Ea: apparent activation energy.