Metal-Supported Catalytic Systems for Methane Combustion Under Wet Conditions, Process for Their Preparation and Uses Thereof

A metal-supported catalytic system for methane combustion under wet conditions, wherein the methane combustion is carried out using a reaction feed having a volume percentage of water which is in the range from 0.5% to 30%, based on the total volume of the reaction feed, wherein the metal-supported catalytic system comprises:

• a support material comprising at least one oxide selected from the group consisting of ceria, a ceria-based mixed oxide, and any combination thereof, and
• at least one supported transition metal (M) selected from any of the groups 5 to 11 of the periodic table of the elements;
• wherein the support material is in the form of nanocubes and is substantially free of alkali metal cations (Alk);
• and
• wherein the amount of the at least one supported transition metal (M) is less than 10% by weight based on the total weight of the catalytic system.