Dynamic oxygen storage capacity DOSC

In general, the CO2 profile has two peaks during a DOSC experiment. The first peak arises during the CO step and the second one during the O2 step. This is illustrated in Fig. 3.5, where the evolution 

Stored, does not affect the quality of sites associated with the back spillover of labile oxygen species, but only the concentration of stored oxygen due to the formation of stable carbonate or sulfate species in ceria. 

OSC investigations on a time scale of a few seconds, such as those previously discussed, are usually interconnected with gas-phase diffusion (inter/intra particle) and desorption phenomena, the dynamics of which is slower than surface phenomena. In addition, the actual change in composition of the exhaust gas for a TWC between lean and rich occurs on a millisecond scale. In this respect, only a limited number of studies have presented OSC data on a millisecond scale. The surface science approach employs an ultrahigh vacuum with gas-pulsed valves, a catalyst on a planar substrate, and a turn over frequency (TOF) mass spectrometer. This set-up allows 

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