Composite oxide support, catalyst for low temperature water gas shift reaction and methods of preparing the same

A method of producing a composite oxide support, comprising:

• dissolving a ceria (CeO2) precursor in a mixed solvent of an alcohol-based solvent and an acid to obtain a first oxide precursor solution;
• dissolving at least one metal oxide precursor selected from alumina (Al2O3) precursors, zirconia (ZrO2) precursors and titania (TiO2) precursors in a mixed solvent of an alcohol-based solvent and an acid to obtain a second oxide precursor solution;
• mixing and heating the first oxide precursor solution and the second oxide precursor solution to form a solution mixture in a gel state;
• and
• calcining the resulting solution mixture in the gel state to obtain the composite oxide support.

A method of producing a low temperature water gas shift reaction catalyst, comprising:

• dissolving a ceria (CeO2) precursor in a mixed solvent of an alcohol-based solvent and an acid to obtain a first oxide precursor solution;
• dissolving at least one metal oxide precursor selected from alumina (Al2O3) precursors, zirconia (ZrO2) precursors and titania (TiO2) precursors in a mixed solvent of an alcohol-based solvent and an acid to obtain a second oxide precursor solution;
• mixing and heating the first oxide precursor solution and the second oxide precursor solution to form a solution mixture in a gel state;
• calcining the solution mixture in the gel state to produce a composite oxide support;
• impregnating a transition metal active component into the composite oxide support by an incipient wetness method to obtain an impregnation product;
• and
• calcining the impregnation product to obtain the low temperature water gas shift reaction catalyst.