Fig. 2
From: Control of coordinatively unsaturated Zr sites in ZrO2 for efficient C–H bond activation
Coke formation in PDH. The UV-vis spectra of ZrO2 with a 9.1, b 13.0 or c 43.4 nm crystallites after different times on PDH stream. d–f Temporal evolution of Kubelka–Munk function at 300 (black circle), 420 (red circle), 600 (light grey circle) and 750 nm (blue circle) under PDH conditions. PDH was performed at 550 °C using a feed containing 40 vol% C3H8 in N2
