| http://www.w3.org/ns/prov#value | - The catalysts could be applied to the above mentioned surfaces by a variety of means known to the art including: impregnation with a solution of soluble precursor followed by thermal or chemical decomposition to obtain the active oxide, thermal spraying processes such as flame spraying or plasma spraying of the oxide catalysts or their precursors, or by application of a slurry of the catalyst mate
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