Oxidative condensation of methane in the presence of lanthanum—cerium catalysts: fundamental character of the effect of nonadditivity

Oxidative condensation of methane (OCM) was conducted for the first time in the presence of new mesoporous amorphous catalysts containing lanthanum ions, cerium ions, and mixed lanthanum and cerium ions. It was shown that the previously discovered effect of the nonadditive action of lanthanum and cerium ions in OCM is a fundamental feature which is characteristic of both a mixture of these rare-earth element (REE) oxides and of the ions of these elements incorporated in a nanostructured silicate matrix.