NOVELTY - Producing energy from carbon monoxide comprises reacting a gas comprising carbon monoxide with a solution including an oxidized polyoxometallate (POM) in the presence of a metal-containing catalyst under conditions and for a time sufficient to reduce the POM to a reduced POM and to oxidize the carbon monoxide to carbon dioxide; and oxidizing the reduced POM in a fuel cell to generate energy.    USE - For producing energy from carbon monoxide, preferably for generating electricity (claimed).    ADVANTAGE - By selectively oxidizing carbon monoxide at room temperature using polyoxymetalate compounds and transition metal compounds over metal-containing catalysts, the water-gas shift reaction and the need to transport and vaporize liquid water in the production of hydrogen for fuel cells are eliminated.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a method to deplete carbon monoxide from a stream of gas comprising reacting an incoming gas including carbon monoxide with a solution comprising POM in the presence of a metal-containing catalyst under conditions and for a time sufficient to reduce the POM and to oxidize the carbon monoxide to carbon dioxide;    (2) a reactor to remove carbon monoxide from a stream of gas comprising a first reaction chamber having an inlet and an outlet, wherein the inlet is dimensioned and configured to introduce a reactant gas comprising carbon monoxide into the first reaction chamber and the outlet is dimensioned and configured to vent a product gas depleted of carbon monoxide from the first reaction chamber; a second reaction chamber having an inlet and an outlet, wherein the inlet is dimensioned and configured to introduce an oxidized condensed liquid reactant into the second reaction chamber and the outlet is dimensioned and configured to vent a reduced condensed liquid product from the second reaction chamber; a membrane disposed between the first reaction chamber and the second reaction chamber, wherein the membrane n contact with both the first and second reaction chambers separates the first reaction chamber from the second reaction chamber; a metal-containing catalyst disposed in the membrane and dimensioned and configured to catalyze a coupled oxidation-reduction reaction, wherein within the first reaction chamber, carbon monoxide present in the reactant gas is selectively oxidized to yield the product gas depleted of carbon monoxide and within the second reaction chamber, the oxidized condensed liquid reactant is reduced to yield the reduced condensed liquid product; and    (3) an electricity generator comprising a reactor to remove carbon monoxide from a stream of gas; and a fuel cell operationally connected to the reactor and including an anode disposed within an anode chamber, a cathode disposed within a cathode chamber, and a proton-exchange membrane disposed between the anode chamber and the cathode chamber.