Abstract A fuel cell electrode is composed of catalytic and gas adsorbing materials which consist of a chromium-tungsten oxide as a support, a metal dispersed on the support, the metal selected from the class consisting of noble metals and alloys of noble metals, a current collector, and a binder bonding the materials together and to the current collector in electronically conductive relationship. Further, the catalytic and gas adsorbing materials comprise a chromium-tungsten oxide as a support, a support of carbon with boron dissolved therein, a mixture of carbon with boron dissolved therein and boron carbide, or carbon, and a metal dispersed on both of the supports, the metal selected from the class consisting of noble metals and alloys of noble metals. An adhesive binder is employed which is not chemically attacked by the electrolyte or the reactant fluid of the cell in which the electrode is used. Such an electrode is particularly useful in a fuel cell employing a fuel containing carbon monoxide, such as reformer gas, an acid electrolyte, and under various operating conditions.
An electrode as in claim 1, wherein said materials comprise a mixed oxide of chromium and tungsten as a support and an additional support selected from the class consisting of carbon with dissolved boron therein, a mixture of carbon with boron dissolved therein and boron carbide, and carbon, and a metal dispersed on both of the supports, the metal selected from the class consisting of noble metals and alloys of noble metals.
Claim 2
Dependent Claim
15 words
An electrode as in claim 2, in which the carbon is in a graphitic state.
Claim 3
Dependent Claim
90 words
A fuel cell comprising a cathode electrode, an oxidant supply for the cathode electrode, an acid electrolyte, and a fuel containing carbon monoxide, and an anode electrode comprising catalytic and gas adsorbing materials, a current collector, a binder bonding the materials together and to the current collector in electronically conductive relationship, said catalytic and gas adsorbing materials comprising a mixed oxide of chromium and tungsten as a support, and a metal dispersed on the support, the metal selected from the class consisting of noble metals and alloys of noble metals.
Claim 4
Dependent Claim
73 words
A fuel cell as in claim 4, wherein said materials comprise a mixed oxide of chromium and tungsten as a support and an additional support selected from the class consisting of carbon with dissolved boron therein, a mixture of carbon with boron dissolved therein and boron carbide, and carbon, and a metal dispersed on both of the supports, the metal selected from the class consisting of noble metals and alloys of noble metals.
Claim 5
Dependent Claim
16 words
A fuel cell as in claim 4, in which the carbon is in a graphitic state.