Deep Eutectic Solvents (DES) are molecular mixtures similar to ionic liquids, having melting points below room temperature. However instead of being composed of a salt, the mixture contains two molecules with strong interactions that hinder formation of an ordered crystalline network. DES share many of the features of ionic liquids (low vapour pressure, adjustable polarity, etc) which make them interesting as green solvents while being far less toxic than typical ionic liquids. They are also good solvents for metal salts meaning they have potential as non-aqueous solvents for surfactant templated syntheses of porous inorganic materials which form from water-sensitive precursors. Here we propose to study the structure of the most commonly studied DES, choline chloride:urea, with and without catalytic amounts of water and Ce(NO3)2, a cerium oxide precursor.