Conductive diamond electrode structure and method for electrolytic synthesis of fluorine-containing material
View Patent ↗The present invention provides a conductive diamond electrode structure for use in electrolytic synthesis of a fluorine-containing material with a fluoride ion-containing molten salt electrolytic bath, which comprises: a conductive electrode feeder; and a conductive diamond catalyst carrier comprising a conductive substrate and a conductive diamond film carried on a surface thereof, wherein the conductive diamond catalyst carrier is detachably attached to the conductive electrode feeder at a portion to be immersed in the electrolytic bath. Also disclosed is an electrolytic synthesis of a fluorine-containing material using the conductive diamond electrode structure.
1. A method for electrolytic synthesis of a fluorine-containing material using a conductive diamond electrode structure with a fluoride ion-containing molten salt electrolytic bath, which conductive diamond electrode structure comprises:
a conductive electrode feeder; and
a conductive diamond catalyst carrier comprising a conductive substrate and a conductive diamond film carried on a surface thereof,
wherein the conductive electrode feeder is exposed at an upper portion, not to be immersed in the electrolytic bath, to a gas zone containing a fluorine gas or a fluoride gas generated by performing electrolysis,
wherein the conductive diamond catalyst carrier is detachably attached to the conductive electrode feeder at a lower portion, to be immersed in the electrolytic bath,
wherein the conductive electrode feeder comprises any one of a conductive carbonaceous material, nickel and a nickel-copper alloy,
wherein the conductive diamond catalyst carrier is detachably attached to the conductive electrode feeder with a screw or with a bolt and a nut, and
wherein the screw or the bolt and nut comprises any one of a conductive carbonaceous material, nickel and a nickel-copper alloy, said method comprising:
holding the conductive diamond electrode structure so that at the portion to be immersed of the conductive electrode feeder, the conductive diamond catalyst carrier is immersed in a fluoride ion-containing molten salt electrolytic bath while an upper portion of the conductive electrode feeder remains exposed to the gas zone containing a fluorine gas or a fluoride gas generated by performing electrolysis, and
performing electrolysis, thereby electrolytically synthesizing a fluorine-containing material.
2. A method for electrolytic synthesis of a fluorine-containing material according to claim 1 , wherein the conductive diamond film is formed by a gas-phase synthesis method.
3. A method for electrolytic synthesis of a fluorine-containing material according to claim 2 , wherein the gas-phase synthesis method is a chemical vapor deposition method.
4. A method for electrolytic synthesis of a fluorine-containing material according to claim 1 , wherein the conductive substrate comprises any one of a conductive carbonaceous material, nickel and a nickel-copper alloy.
5. A method for electrolytic synthesis of a fluorine-containing material according to claim 1 , wherein the conductive electrode feeder is a conductive carbonaceous material, and a metal coating film is formed on a bus bar joint at an upper end of the conductive electrode feeder by plating or thermal spraying.
6. A method for electrolytic synthesis of a fluorine-containing material according to claim 5 , wherein the metal that forms the metal coating film is a metal selected from the group consisting of a conductive carbonaceous material, nickel and a nickel-copper alloy.