The photocatalytic processes allow promoting difficult
reactions (even thermodynamically limited1
) at mild con-
ditions, by taking advantage of photoenergy instead of thermal
activation. In this sense, photocatalysis arises as a promising
alternative for the selective oxidation of methane into
oxygenated products. Some approximations have been
evaluated in literature, using several types of materials and
oxidizers. From the evidence of the photochemical conversion
of methane with water vapor at low temperature under certain
irradiation conditions,5 some authors have reported the
photocatalytic oxidation of methane, mediated by semi-
conductors in the presence of H2O. WO3 has been one of
the most commonly studied materials, mainly because of its