Anodes for alkaline electrolysis
A method of making an anode for alkaline electrolysis cells includes adsorption of precursor material on a carbonaceous material, conversion of the precursor material to hydroxide form and conversion of precursor material from hydroxide form to oxy-hydroxide form within the alkaline electrolysis cell.
1. A method of making an anode for an alkaline electrolysis cell comprising:
forming a layer of a precursor material on a carbonaceous material;
converting the precursor material to a hydroxide form;
wherein, said precursor material is a solution of manganese or cobalt salt; and
said carbonaceous material has a form selected from the group consisting of sheet, felt, cloth, mesh, foam, and combinations thereof.
2. The method of claim 1 , wherein the carbonaceous material comprises a high surface area carbon material.
3. The method of claim 1 , wherein the carbonaceous material comprises graphite.
4. The method of claim 1 , wherein the precursor material is a manganese or cobalt metal salt with an anion selected from the group consisting of nitrate, acetate, sulfate, chloride and combinations thereof.
5. The method of claim 1 , wherein the precursor material is selected from the group consisting of cobalt acetate, manganese sulfate and combinations thereof.
6. The method of claim 1 , wherein the forming of the layer comprises adsorption of the precursor material on the surface of the carbonaceous material.
7. The method of claim 1 , wherein the converting the precursor material to a hydroxide form is accomplished by treatment with an alkaline electrolyte.
8. The method of claim 7 , wherein the hydroxide solution comprises potassium hydroxide.
9. A method of making an anode for alkaline electrolysis cell comprising:
adsorbing a manganese or cobalt precursor material on a carbonaceous material;
converting the manganese or cobalt precursor material to hydroxide form;
converting in-situ the manganese or cobalt precursor material from hydroxide form to oxy-hydroxide form within the alkaline electrolysis cell;
wherein said carbonaceous material has a form selected from the group consisting of sheet, felt, cloth, mesh, foam, and combinations thereof.
10. The method of claim 9 , wherein the carbonaceous material comprises carbon felt.
11. The method of claim 9 , wherein the carbonaceous material comprises graphite felt.
12. A catalytic anode for an alkaline electrolysis cell prepared by:
forming a layer of a precursor material on a carbonaceous material; and
converting the precursor material to a hydroxide form;
wherein said carbonaceous material has a form selected from the group consisting of sheet, felt, cloth, mesh, foam, and combinations thereof; and
wherein the precursor material is selected from the group consisting of cobalt acetate, manganese sulfate and combinations thereof.
13. The anodes of claim 12 , wherein the carbonaceous material comprises graphite.