We measured NO production via N 2 oxidation in a radio frequency plasma reactor at low O 2 -to-N 2 pressure ratios, with and without downstream catalyst. The reactor consists of an inductive coil connecting to a radio frequency power supply and a matching network and a quartz tube with a heating mantle (Fig. ). A porous Pt film deposited on a tubular YSZ membrane is used as the catalyst. Catalyst microstructure consists of a network of percolated particles of the order of micron (Fig. ) with thickness of approximately 14 micron (Fig. ).