A fuel cell stack has at least one end and/or current-collecting plate which includes a substrate coated with an electrocatalytically-active material, preferably comprising ruthenium oxide and optionally ruthenium oxide and a non-noble metal oxide.

An electrode structure for use, for example, in a bipolar electrolyser comprising (i) a pan with a dished recess and a flange around the periphery thereof for supporting gasket means for sealing a separator between the flanges in adjacent electrode structu...