초록

Processes and methods for producing a gas diffusion electrode are provided. The process of the present invention includes the steps of forming a sheet or other suitable structure of carbonaceous material and forming a catalyst layer on the carbonaceous material by vapor deposition.

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1. A process for producing an electrode capable of gas diffusion comprising the steps of:forming a sheet of carbonaceous material, wherein the carbonaceous material comprises a carbon nanotube; and forming a layer of catalyst material on the sheet by a vapor deposition process, and forming the gas d

1. A process for producing an electrode capable of gas diffusion comprising the steps of:forming a sheet of carbonaceous material, wherein the carbonaceous material comprises a carbon nanotube; and forming a layer of catalyst material on the sheet by a vapor deposition process, and forming the gas diffusion electrode. 2. The process as claimed in claim 1, wherein the carbonaceous material further comprises a graphite material composed of fibers.3. The process as claimed in claim 1, wherein the step of forming the sheet is conducted by filtering a fluid suspension containing the carbonaceous material.4. The process as claimed in claim 1, wherein the step of forming the layer of catalyst material is performed by a sputtering process.5. The process as claimed in claim 1, wherein the step of forming the layer of catalyst material is performed by a vacuum deposition process.6. The process as claimed in claim 1, wherein the step of forming the layer of catalyst is conducted by a pulse laser deposition process.7. The process as claimed in claim 1, wherein the layer of catalyst comprises a material selected from the group consisting of platinum, platinum alloy, palladium, magnesium, titanium, manganese, lanthanum, vanadium, zirconium, nickel-lanthanum alloy, titanium-iron alloy, iridium, rhodium, gold, and mixtures thereof.8. A process for producing an electrochemical device, including a gas diffusion electrode comprising the steps of:providing a carbonaceous material; applying a layer of catalyst material to the carbonaceous material by a vapor deposition process, wherein the carbonaceous material comprises a carbon nanotube; applying an electrode material to the layer of catalyst; and forming the gas diffusion electrode. 9. The process as claimed in claim 8, wherein the electrochemical device comprises a fuel cell.10. The process as claimed in claim 8, wherein the electrochemical device comprises an air cell.11. The process as claimed in claim 8, wherein the carbonaceous material further comprises a graphite composed of fibers.12. The process as claimed in claim 8, wherein the carbonaceous material is formed into a sheet layer by filtering a fluid suspension containing the carbonaceous material.13. The process as claimed in claim 8, wherein the layer of catalyst is formed by a sputtering process.14. The process as claimed in claim 8, wherein the layer of catalyst is formed by a vacuum deposition process.15. The process as claimed in claim 8, wherein the layer of catalyst is formed by a pulse laser deposition process.16. The process as claimed in claim 8, wherein the layer of catalyst comprises a material selected from the group consisting of platinum, platinum alloy, palladium, magnesium, titanium, manganese, lanthanum, vanadium, zirconium, nickel-lanthanum alloy, titanium-iron alloy, iridium, rhodium, gold and mixtures thereof.