Dynamic Structure Changes of a Heterogeneous Catalyst within a Reactor: Oscillations in CO Oxidation over a Supported Platinum Catalyst

Kinetic oscillations in the oxidation of CO occur because of local changes in the catalyst structure inside the reactor. Activity loss within an oscillation originates from partial reduction of the active surface, which occurs at distinct positions within the catalyst bed. The original activity is regained partly by re-oxidation of the catalyst, during which a short-lived phase is formed.