Functional electrode

Details Functional electrode Functional electrode

1983-01-10

1984-05-29

Williams, Howard S.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 56R, 204292, 358902, C25B 1108, C25D 1134, H01M 488

Patent

active

044513488

ABSTRACT:
A functional electrode is disclosed which is usable as an electrochromic display electrode, as a catalytic electrode effective to catalyze the evolution of oxygen and chlorine gases and the like. The electrode is composed of a conductor and a film deposited on the surface of the conductor, the film being comprised of a compound of the formula M.sup.I M(III)[M'(II)(CN).sub.6 ] or M(III).sub.4 [M'(II)(CN).sub.6 ].sub.3 wherein M(III) is Fe(III), Ru(III) or Os(III), M'(II) is FE(II), Ru(II) or Os(II) and M.sup.I is an alkali metal cation, with the proviso that said compound does not contain both Fe(III) and Fe(II). The functional electrode is produced by electrodepositing a compound of the formula M.sup.I M(III)[M'(II)(CN.sub.6)] or M(III).sub.4 [M'(II)(CN).sub.6 ].sub.3 on a conductor, from an aqueous solution containing M(III) ions and [M'(III)(CN).sub.6 ].sup.3- ions, wherein M(III), M'(II) and M.sup.I are as already defined and M'(III) is Fe(III), Ru(III) or Os(III), with the proviso that the aqueous solution does not contain both FE(III) and [Fe(III)(CN).sub.6 ].sup.3- ions and the deposited compound does not contain both Fe(III) and Fe(II).

REFERENCES:
patent: 1911808 (1933-05-01), Collins
patent: 2312898 (1943-03-01), Ham et al.
patent: 2837471 (1958-06-01), Law et al.
patent: 3847659 (1974-11-01), Sobajima et al.

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