In our previous study, we investigated (the influence of) steady-state deactivation in-between PTK experiments and it was observed that the deactivation had no influence on the transient response, which we attributed to an unaltered reaction mechanism . However, a more detailed analysis of the impact of periodic switching on the monotonic change in catalyst activity with large characteristic times is still lacking. At the same time, an insight on the impact of deactivation on the microkinetic processes is highly desirable , which can in principle be provided by the PTK methodology.