Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut

Details Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut

1982-04-29

1984-01-17

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204123, 204290R, 204290F, 204292, 204293, C25B 134

Patent

active

044262620

ABSTRACT:
Platinum and iridium in catalytic electrodes for electrochemical uses is partially replaced with lead ruthenate-tantalum oxide composite. Electrodes are fabricated by first coating a film-forming metal substrate with a platinum-iridium composite undercoat, then overcoating with a composite containing lead, ruthenium, tantalum, platinum, iridium and oxygen. The most preferred anodes have a titanium substrate initially coated with approximately at least 2 gm/m.sup.2 of 70:30 .sup.w /o Pt:Ir composite, followed by about 20 gm/m.sup.2 of a composite having the nominal composition of 22.2.sup.w /o Pb.sub.2 Ru.sub.2 O.sub.6 ; 66.6 .sup.w /o Ta.sub.2 O.sub.5 ; 7.9 .sup.w /o Pt and 3.4 .sup.w /o Ir. The outer layer of the prepared anode contains from about 10 to about 16 .sup.w /o lead, from about 40 to about 65 .sup.w /o tantalum, from about 5 to about 7.5 .sup.w /o ruthenium, from about 6.0 to about 10 .sup.w /o platinum, from about 2.5 to about 5 .sup.w /o iridium, and from about 10 to about 20 .sup.w /o oxygen. These electrodes may be used in acidic, neutral or alkaline solutions. Typical uses include production of chlorine and chlorine compounds and electrowinning of metals, such as zinc.

REFERENCES:
patent: 3177131 (1965-04-01), Angell et al.
patent: 3603414 (1972-05-01), Martinsons et al.
patent: 3691052 (1972-09-01), Langley
patent: 3718551 (1973-02-01), Martinsons
patent: 3773555 (1973-11-01), Cotton et al.
patent: 3778307 (1973-12-01), Beer et al.
patent: 3926751 (1975-12-01), DeNora et al.
patent: 4157943 (1979-06-01), Scarpellino et al.
patent: 4203810 (1980-05-01), Warne et al.

Affiliated with

Also associated with

Rating

Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Promotion of Pt-Ir catalytic electrodes with lead, tantalum, rut will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-699552