r0005">Catalytic hydrogen combustion was studied under oxidant conditions.
r0010">Pt particles in oxidized form studied over powdery β-SiC and other supports.
r0015">Catalysts activated upon exposure to the oxidant mixture and high temperatures.
r0020">Medium size, partially oxidized Pt particles on SiC show high activity.
r0025">Catalysts have shown a reactivation upon cycling experiments.