Abstract:
A REFERENCE ELECTRODE HALF CELL HAS AN ELONGATED FLEXIBLE ELECTRICALLY INSULATED TUBE HAVING OPPOSITE OPEN ENDS, A SILVER WIRE POSITIONED PARTIALLY WITHIN THE TUBE AT ONE END THEREOF AND EXTENDING OUTWARDLY FROM THE ONE END, THE TUBE BONDED TO THE SILVER WIRE AT THE END, A COATING OF SILVER CHLORIDE AN A PORTION OF THE SILVER WIRE POSITIONED WITHIN THE TUBE, AND AT LEAST ONE GELLED EQUITRANSFERENT SALT SOLUTION FILLING THE TUBE IN CONTACT WITH THE SILVER CHLORIDE COATING ON THE SILVER WIRE AND IN CONTACT WITH THE OPPOSITE OPEN END OF THE TUBE.
Abstract:
Fuel cell electrodes are composed of a mixture of catalytic and gas adsorbing materials which consist of a chromium-tungsten oxide and a metal dispersed on a support, the metal selected from the class consisting of noble metals and alloys of noble metals, with a current collector, and a binder bonding the materials together and to the current collector in electronically conductive relationship. 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.
Abstract:
AN ELECTRODE IS DESCRIBED WHICH HAS A CATALYTIC COATING OF PLATINUM, PALLADIUM, AND A THIRD LESS NOBLE METAL ON A SUBSTRATE. SUCH AN ELCECTRODE PROVIDES A HIGH PERFORMANCE ANODE FOR ELECTROCHEMICAL CELLS.
Abstract:
A composite gas diffusion electrode has an electrode body, at least one water-soluble polymeric thickening or gelling agent swellable in an aqueous electrolyte, and a layer of the thickening agent adhering to and covering at least a portion of one of the surfaces of the electrode body. Upon subsequent use in contact with an aqueous electrolyte, the thickening agent swells on the covered surface of the electrode body preventing electrolyte leakage therethrough, preventing drowning of the electrode, reducing loss of any dissolved fuel in the electrolyte, and immobilizing at least partially the electrolyte. Additionally, an electrochemical cell with at least one gas diffusion electrode has the above type of thickening agent covering various portions of the interior structure of the cell. Upon subsequent use in contact with an aqueous electrolyte, the thickening agent swells on covered portions of the interior structure preventing electrolyte leakage therethrough, and immobilizing at least partially the electrolyte.
Abstract:
A REACTANT SENSOR IS DESCRIBED WHICH HAS A GAS DIFFUSION CATHODE, AN ANODE SPACED FROM THE CATHODE, THE ANODE WITH A CATALYTIC COATING OF PLATINUM, PALLADIUM, AND A THIRD LESS NOBLE METAL ON A SUBSTRATE THE CATHODE BEING LARGER THAN THE ANODE IN A GEOMETRIC AREA RATIO OF AT LEAST 3 TO 1, AND A CURRENT METER CONNECTED ACROSS THE CATHODE AND ANODE.
Abstract:
METHODS ARE DESCRIBED FOR FORMING ELECTRODES BY METALLIC DEPOSITION FROM A SOLUTION CONTAINING PLATINUM, PALLADIUM AND SELECTED THIRD METAL ONTO A POROUS SUBSTRATE HAVING AT LEAST A NON-NOBLE METAL COATING. THE METALLIC DEPOSITION IS ACCOMPLISHED BY SUBSTRATE IMMERSION, SUBSTRATE DIPPING, OR SUBSTRATE IMMERSION IN WHICH THE SUBSTRATE IS CONNECTED TO THE POSITIVE TERMINAL OF A POWDER SUPPLY. SUCH ELECTRODES PROVIDE HIGH PERFORMANCE ANODES FOR ELECTROCHEMICAL CELLS.