Catalytic Carbon Oxidation Over Ruthenium-Based Catalysts

摘要

The redox chemistry of ruthenium has been exploited in many catalytic redox processes, for example in low-temperature carbon monoxide oxidation,[1], [2] steam reforming of methane,[3], [4] methanation of carbon monoxide,[5], [6] Fisher-Tropsch synthesis,[7], [8] and the water gas shift reaction.[9], [10] Despite the high activity of ruthenium catalysts in oxidation reactions,[1], [2], [11]-[13] however, little research has been done on the possibility of using ruthenium catalysts for catalytic carbon oxidation.[14] We report here the exceptional activity of supported ruthenium metal in the oxidation of solid carbon in the presence of oxygen and water vapor. The finding is particularly relevant to the development of catalytically regenerated soot filters for the purification of diesel engine exhaust.