Catalyst for chemical looping combustion

A catalyst composition for use in a chemical looping combustion reaction, the catalyst composition comprising a mixture of metal oxides dispersed on a ceramic support, the mixture of metal oxides including NiO and WO3, wherein the metal oxides of NiO and WO3, as components of the catalyst composition, interact with each other on the ceramic support to form a nickel tungsten oxide (NiWO4) interaction complex which functions as an oxygen carrier in the chemical looping combustion reaction, wherein the catalyst composition comprising 35% to 60% (w/w) NiO and 10% to 35% (w/w) of WO3.