In order to compare selectivity across different catalysts and reactions, we consider the product yields (denoted = >"?@ABC ) calculated as the selectivity to a specific product times the alkane conversion at ! "#$ . The yield is considered in this analysis -as opposed to the selectivity -to take into account that different alkane conversions (shown by the grey bars in Fig. ) that are achieved by different catalysts. The yield of combustion products CO and CO2, denoted = D* E , is above 20% among the catalysts with high and moderate activity (Fig. , red bars). Two specific total combustion catalysts can be identified: MnWO4, SmMnO3. These materials provide relatively high = D* E , in particular in n-butane oxidation, and present a close-to-100% ratio between CO2 and COx yield (= D* F /= D* E , Fig. , yellow bars). This behavior correlates with the unique ability of these catalysts to oxidize CO (vide supra). Nevertheless, in general CO oxidation cannot be used as a probe reaction for selectivity, since a number of catalysts which produce combustion products in alkane oxidation show no activity in CO oxidation. Conversion (8 9:;9<# ) and product yield (= >"?@ABC ) at the reference temperature (! "#$ ) as well as the oxygenate selectivity at low alkane conversion, H ?IJK#<9C# . ! "#$ determined for each catalyst is displayed as a black bar and refers to the secondary axis (on the right).