Bridging carbonyls, carbon monoxide adsorbed

The carbon issued from the methane decomposition over the reduced sites will be oxidized by oxygen migrated from the ceria. Adsorbed carbon monoxide, actually under the form of various multibonded, bridged and linear carbonyls will migrate to the support to form formate species as revealed by DRIFT [6]. Figure 4 shows the transient response of the formate formation as predicted by the model. This transient response corresponds quite well with the evolution in time of the assigned formate IR bands as reported in [6]. 

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