Fig. 8: Model.
From: In situ observation of oscillatory redox dynamics of copper
Illustration of different stages that the surface passes through during a redox cycle at 700 °C at 4% oxygen in a H2/O2 atmosphere and total pressure of 20 Pa. The time axis is running from the left to the right. r(O2) and r(H2) represent the rates of O2 activation and H2 activation, respectively. Arrows indicate kinetic barriers, i.e., transitions that require induction time.
