Abstract: An oxygen gas-bearing, flow-through electrode has in associated, cooperative combination: (i) a porous, fluid-pervious and permeable, catalyst-bearing body section adapted to be operated in the fluid-flooded condition; coupled with (ii) means for intimately mixing and delivering to said body section in pore-flooding supply quantities an interblended gas-entrained fluid mixture in effectively reactive relative proportions of desired liquid electrolyte and oxygen-bearing gas. The electrode can be used in any electrolytic cell which is adapted, by inclusion of appropriate components and constituent materials therein, to either generate electricity by chemical action when operated in the galvanic mode or, alternatively when operated in the electrolysis mode, to make recoverable product from the ionically decomposed constituents of the dissolved molecules in the electrolyte.

Abstract: A porous electroplatable body is interiorly electroplated and the like by: making an at least substantial initial capacity filling of all or at least a portion of the void spaces in the body with an appropriate electroplating or other deposit-releasing bath solution or other dispersion; effecting subsequent immersion of the bath-replete body in a non-plating or non-depositing electroconductive liquid media; then following these steps by application of plating current to and through the bath containing body whereupon the interior surfaces of the body are plated or coated.

Abstract: A porous nickel body is interiorly silver plated in a two-step procedure by: first, acid etching the nickel surface for activation; then plating the activated surface by replacement of elemental nickel thereon with silver from a dissolved aqueous cyanide or equivalent silver salt.

Abstract: A porous electrode, possessed of good physical qualities, containing size optimized electrocatalyst-bearing pores ensuring suitability for electrochemical reaction promotion, including the electroreduction of oxygen in alkaline media, is comprised of the compressed and compacted product of a pre-catalyzed, volumetrically reduced pre-form structure that, prior to densification, was characterizable in being laced with precursive interstitial passageways that are larger than electrode body pore size and which are comparably of a more open catalyst-applicating accessibility which passageways had been pre-provided on their wall surfaces with effective quantity deposits of catalytic agent.