Method of making a catalytic lead-based oxygen evolving anode

Details Method of making a catalytic lead-based oxygen evolving anode Method of making a catalytic lead-based oxygen evolving anode

1984-07-06

1985-09-24

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

4271265, 502101, C25B 1100, C25C 700

Patent

active

045431744

ABSTRACT:
A method of making a catalytic lead-based oxygen-evolving anode comprises catalytically activating titanium sponge particles larger than 300 microns by impregnating with a solution containing Mn and Ru compounds, in amounts corresponding to Mn/Ru in an atomic ratio between 70/30 and 90/10, and thermally converting the compounds to an electrocatalyst comprising Mn and Ru in oxide form. Catalytic Ti sponge particles with up to 3 wt % Ru are thus produced, which are then uniformly distributed on the surface of a lead anode base in an amount greater than 400 g/m.sup.2, pressed, and partly embedded, thereby firmly anchoring and electrically connecting them to the lead anode base. The catalytic lead-based anode thus produced operates with oxygen evolution on the catalytic particles at a reduced potential at which the lead base remains electrochemically inactive. It thereby operates with significant energy savings over an extended service life.

REFERENCES:
patent: 3878083 (1975-04-01), DeNora
patent: 3926751 (1975-12-01), DeNora
patent: 4425217 (1984-01-01), Beer

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