Typical catalysts include cobalt or manganese naphthenates. Bromine radicals decompose cobalt and manganese hydroperoxides. Mines produce gold, silver, zinc, cobalt and nickel. Catalysts are based on molybdenum sulfide containing smaller amounts of cobalt or nickel. The principal ores of copper, zinc, nickel, cobalt, molybdenum, and other metals are sulfides. Such oxidations require metal catalyst, such as the naphthenate salts of manganese, cobalt, and chromium. They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel. Dimethylglyoxime forms complexes with metals including Nickel, Palladium, and Cobalt. Kosovo has large reserves of lead, zinc, silver, nickel, cobalt, copper, iron and bauxite. Electron lenses are manufactured from iron, iron-cobalt or nickel cobalt alloys, such as permalloy. The presence of iron, nickel, copper, and cobalt strongly activates corrosion. The process is catalyzed by cobalt or manganese naphthenates. Wh/L when paired with a lithium cobalt oxide cathode. First, copper is removed by adding hydrogen sulfide, leaving a concentrate of cobalt and nickel. The hydrodesulfurization of petroleum uses a catalyst derived from cobalt and molybdenum.