Nickel, electrolytic preparation properties

Gas diffusion electrode — (also gas fed electrode) Electrode employed in fuel cells, - electrolysers, and - sensors. The electrode is a porous body prepared in various ways from a variety of materials [i]. Hydrophilic electrodes are mostly made from metals (e.g., nickel). The material is finely dispersed (e.g., by the Raney process) and manufactured into a sheet or plate. Depending on the wetting properties and the pore size, large pores will be wetted and subsequently filled by the electrolyte solution (or molten electrolyte salt), fine pores are not filled... 

Figure 32 Schematic eiectron density-of-states diagrams for eiectrochromic, EC, multilayer design. The materials include In203 Sn (ITO), nickel oxide (presumably hydrous), tungsten oxide (also presumably hydrous) prepared so that the EC and chemically protective (PR) properties are emphasized, and an electrolyte. The Fermi energy is denoted Ep, with Epi and Ep2 pertaining to the case of an applied potential, Ucoi filled states are denoted by shadings. (Ref. 235. Reproduced by permission of Springer Verlag)...

Many metals are made by electrodeposition. Several metals are prepared by electrolysis in molten salts (Section 7.6). A variety of plating processes have been developed for the metals deposited by electroplating. Quite different, usually aqueous, electrol54es are used. Each electrolyte has characteristic features and produces deposits with quite different properties. As an example, some electrolytes for the plating of copper will be described. Other important plating processes, e.g., zinc, nickel, tin, and lead, are described in detail in the literature. ... 

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