Electrochemically active composition, methods of making, and uses thereof
AssigneePhelps Dodge Corporation
InventorsScot P. Sandoval, Michael D. Waite, Casey J. Clayton
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Abstract
Accordingly, in various embodiments, the present invention provides methods for making electrochemically active materials. Methods include making an electrochemically active material by reacting a platinum group metal salt in a organic solvent to yield a mixture, then heating the mixture to create a metal-organic solvent complex and an acid, followed by removing at least a portion of the acid, and yielding an electrochemically active material comprising the metal-organic solvent complex. In an exemplary embodiment, the resulting electrochemically active material may be used for coating an electrode.
Claims20
A method of making a composition, the method comprising:
- reacting a platinum group metal salt in a polar organic solvent to yield a mixture;
- heating said mixture;
- creating a platinum group metal-organic solvent complex and an acid;
- removing at least a portion of said acid;
- and
- yielding a composition comprising said platinum group metal-organic solvent complex.
A method of making an electrode, the method comprising:
- coating at least a portion of a conductive substrate with a mixture comprising an iridium-methylethylketone complex, tantalum, and a solvent;
- heating said conductive substrate coated with said mixture;
- and
- oxidizing said iridium into at least one of an amorphous phase, a crystalline phase, and combinations thereof.
An anode comprising:
- a conductive substrate;
- and
- a coating essentially free of chlorine, said coating comprising iridium oxide and tantalum oxide, said coating on at least a portion of a surface of said conductive substrate.
A method of lowering a cell voltage in an electrowinning circuit, the method comprising:
- providing an electrowinning cell;
- employing a coated anode in said electrowinning cell, said coated anode having a coating comprising iridium oxide and tantalum oxide, said coating essentially free of chlorine;
- and
- powering said electrowinning cell.
Dependencies are inferred from the claim text.