The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1981
Filed:
Mar. 27, 1980
John M Sedlak, Andover, MA (US);
Richard J Lawrance, Hampstead, NH (US);
General Electric Company, Wilmington, MA (US);
Abstract
A method of making substantially oxide-free metal alloys is described. The alloys are made by a hot alkaline reduction of compounds of at least two metals, such as the halides of the metals dissolved in an aqueous medium containing a reducing agent. The dissolved metal compounds containing a first reducing agent are added to a second reducing agent, in a alkaline medium, and the substantially oxide-free, finely-divided alloy precipitates from solution. The alloy has a unique X-ray diffraction pattern indicating that it is a true alloy with no metal oxides present. In a preferred embodiment, ruthenium and platinum chlorides are dissolved in water containing a dissolved reducing agent. This solution is added to a second reducing agent in an alkaline medium at elevated temperatures, and a finely-divided black precipitate of a true alloy of ruthenium and platinum forms. The X-ray diffraction pattern shows a distorted ruthenium structure having platinum in solid solution. Oxygen evolution catalysis was substantially improved in an electrochemical cell having a catalytic cathode made of this alloy of platinum and ruthenium.