TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The carbon monoxide (CO)-containing gas is syngas. The WGS catalyst comprises platinum (Pt) and/or its oxides; copper, silver, gold, and/or their oxides; and titanium, zirconium, iron, ruthenium, iridium, palladium, and/or their oxides. It further comprises rhodium and its oxides. It further comprises manganese, chromium, an/or their oxides. It is supported on a carrier comprising alumina, zirconia, titania, ceria, magnesia, lanthania, niobia, zeolite, perovskite, silica clay, yttria, zeolite, and/or iron oxide. The carrier is preferably zirconia.Preferred Composition: The WGS catalyst comprises 0.01-10 wt.%, with respect to the total weight of all catalyst components plus the support material, of each Group 8-10 element in the WGS catalyst. It comprises 0.01-2 wt.%, preferably 0.05-0.5 wt.%, of each Group 8-10 element in the WGS catalyst. It comprises 0.05-5 wt.% with respect to the total weight of all catalyst components plus the support material, of each Group 11 element in the WGS catalyst. It comprises 0.05-20 wt.%, with respect to the total weight of all catalyst components plus the support material, of each lanthanide element in the WGS catalyst.    TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: The CO-containing gas is contacted with the WGS at 150-450degreesC, and at not more than 75 bar, preferably not more than 1 bar. EXAMPLE - An alpha-alumina precoated wafer was uniformly loaded with a titanium (Ti) primer layer by liquid dispensing of 4 muL of 0.71M titanium oxalate solution onto each element of a well array. After drying, 5 noble metals were deposited in a second impregnation step on top of the Ti-preloaded wafer. After drying, 8 noble metal solutions were deposited in a third impregnation step. Metal nitrates were precursors for palladium, rhodium and gold. Platinum diamine dinitrite, ruthenium nitrosyl nitrate and iridium hexachloride were also utilized as precursor solutions. The wafer was reduced in two steps. The reduced libraries were screened for WGS activity with a mixed hydrogen/carbon monoxide/carbon dioxide/water feed at 300degreesC, 350degreesC, and 400degreesC. The experiment demonstrated active and selective WGS catalyst formulations of various formulations on the wafer. Platinum-gold-titanium containing catalysts were found to be selective systems under high temperature shift conditions.