Abstract: A composition comprising an extruded inorganic support comprising an oxide of a metal or metalloid, and at least one catalytically active metal, wherein the extruded inorganic support has pores, a total pore volume, and a pore size distribution, wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum, wherein a first peak has a first maximum of pore diameters of equal to or greater than about 120 nm and a second peak has a second maximum of pore diameters of less than about 120 nm, and wherein greater than or equal to about 5% of a total pore volume of the extruded inorganic support is contained within the first peak of pore diameters.

Abstract: Cathodes useful in an electrolytic cell, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with a catalytic coating composition. In one aspect, the catalytic coating includes a base layer of at least one primary electrocatalytic metal with particles of at least one electrocatalytic metal oxide entrapped therein. In another aspect, at least one upper oxide layer is formed on the base layer. Each upper oxide layer includes a substantially heterogeneous mixture of at least one primary electrocatalytic metal oxide and at least one secondary electrocatalytic metal oxide. The catalytic coatings are tightly adherent to the underlying substrate, resist loss during cell operation and exhibit low hydrogen overvoltage potentials. Disclosed are methods for preparing the above-described cathodes.

Abstract: Cathodes useful in electrolytic cells, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with an electrocatalytic coating. The electrocatalytic coating includes palladium and at least one primary electrocatalytic metal, such as a platinum group metal. The coating optionally includes at least one secondary electrocatalytic metal, such as nickel, cobalt, iron, copper, manganese, molybdenum, cadmium, chromium, tin and silicon. Also disclosed is non-electrolytic reduction method for preparing the cathodes. The method provides a tightly adherent coating, improves electrocatalyst loading and reduces cathode production costs.

Abstract: Cathodes useful in electrolytic cells, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with an electrocatalytic coating. The electrocatalytic coating includes palladium and at least one primary electrocatlaytic metal, such as a platinum group metal. The coating optionally includes at least one secondary electrocatalytic metal, such as nickel, cobalt, iron, copper, manganese, molybdenum, cadmium, chromium, tin and silicon. Also disclosed is a non-electrolytic reduction method for preparing the cathodes. The method provides a tightly adherent coating, improves electrocatalyst loading and reduces cathode production costs.

Abstract: Cathodes useful in an electrolytic cell, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with a catalytic coating composition. In one aspect, the catalytic coating includes a base layer of at least one primary electrocatalytic metal with particles of at least one electrocatalytic metal oxide entrapped therein. In another aspect, at least one upper oxide layer is formed on the base layer. Each upper oxide layer includes a substantially heterogeneous mixture of at least one primary electrocatalytic metal oxide and at least one secondary electrocatalytic metal oxide. The catalytic coatings are tightly adherent to the underlying substrate, resist loss during cell operation and exhibit low hydrogen overvoltage potentials. Also disclosed are methods for preparing the cathodes.