Abstract

The oxidation state of Ru catalysts supported on undoped, Ca 2+ -doped and W 6+ -doped TiO 2 has been investigated under conditions of partial oxidation of methane employing XPS and FTIR techniques. It is found that the catalytic activity and selectivity toward synthesis gas formation depends on the ability of the support to stabilize Ru in the metallic state under reaction conditions. This ability is affected by the nature of the dopant cation.

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