Finally, we also evaluated the selectivity towards oxygenates at the fixed alkane conversion value of 5%, denoted H ?IJK#<9C# (Fig. , light green bars). The materials for which H ?IJK#<9C# is high are the same as those for which = ?IJK#<9C# is relatively high, with the exception of VWPOx. VWPOx presents relatively high H ?IJK#<9C# values in n-butane oxidation, in spite of the rather low = ?IJK#<9C# .