Cobalt oxyfluoride catalysts for electrolytic dissociation of water
Disclosed are electrolysis catalysts formed from cobalt, oxygen and fluorine. They can be formed as a coating on an anode by conducting an electrolysis reaction using an electrolyte containing cobalt and fluoride. The catalysts will facilitate the conversion of water to hydrogen gas and oxygen gas, even at pH neutral/room temperature reaction conditions. The resulting hydrogen gas is a means of storing renewable energy for use in hydrogen powered vehicles or the like.
1. A method for generating a gas selected from the group of hydrogen and oxygen from water via an electrolysis reaction, comprising:
placing an anode and a cathode in water;
using an external source of electricity to drive the electrolysis reaction from the anode and cathode at a time when the anode comprises a substrate comprising a catalyst coating, the catalyst coating comprising cobalt, oxygen and fluorine;
whereby the gas is thereby generated.
2. The method of claim 1 , wherein the gas is both hydrogen and oxygen, hydrogen is generated at the cathode, and oxygen is generated at the anode.
3. The method of claim 1 , wherein the catalyst coating comprises about two oxygens for each cobalt present in the catalyst coating and the fluorine in the catalyst coating is present as fluoride.
4. The method of claim 1 , wherein the substrate further comprises a tin oxide.
5. The method of claim 1 , wherein the water has a pH of between 3 and 7.
6. The method of claim 1 , wherein a cobalt cation is present in the water at a concentration of between 0.1 and 100 mM.
7. The method of claim 1 wherein a fluoride anion is present in the water at a concentration between 0.1 and 2 M.