NOVELTY - A water gas shift catalyst comprises platinum and/or its oxides; lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, and/or their oxides; and scandium, yttrium, titanium, zirconium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, iridium, nickel, palladium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, and/or their oxides.    USE - For use in producing hydrogen-rich gas, e.g. hydrogen-rich synthesis gas.    ADVANTAGE - The catalyst exhibits both high activity and selectivity to hydrogen generation and carbon monoxide oxidation.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (a) production of hydrogen-rich gas by reacting carbon monoxide-containing gas (e.g. synthesis gas) with the above water gas shift catalyst in the presence of water at not more than 450 degrees C;    (b) preparation of catalyst by applying lithium- and iron-containing precursors to a surface, calcining the surface to 600-900 degrees C (preferably 700 degrees C), impregnating sodium on the treated surface, and applying platinum-containing precursor to the treated surface; and    (c) a fuel processing system for generation of hydrogen-rich gas from hydrocarbon or substituted hydrocarbon fuel, comprising a fuel reformer having an inlet for receiving a fuel reactant stream containing hydrocarbon or substituted hydrocarbon fuel, a reaction chamber for converting the reactant stream to a reformed product stream containing carbon monoxide and water, and an outlet for discharging the product stream; a water gas shift reactor for effecting a water gas shift reaction at less than 450 degrees C, and including an inlet for receiving a water gas shift feed stream comprising carbon monoxide and water, a reaction chamber comprising a water gas shift catalyst for generating hydrogen and carbon dioxide from the water gas shift feed stream, and an outlet for discharging the resulting hydrogen-rich gas; and a temperature controller for maintaining the temperature of the reaction chamber of water gas shift reactor at less than 450 degrees C.