Electrochemical device having an oxygen electrode containing a pyrochlore type compound electrocatalyst
US4146458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An electrochemical device is described which has an oxygen electrode which contains a pyrochlore type electrocatalyst material. This electrocatalyst material is one or more electrically conductive pyrochlore compounds selected from the compounds of the following formula: EQU A.sub.2 B.sub.2 O.sub.7-y (1) wherein A is any of the known pyrochlore structure metal cations, B is a pyrochlore structure metal cation at least a major portion of which is selected from the group consisting of one or more of Ru, Rh, Ir, Os, Pt, Ru-Pb mixtures and Ir-Pb mixtures, and wherein O.ltoreq.y.ltoreq.1.0. Desirably, A is a pyrochlore structure metal cation at least a major portion of which is selected from the group consisting of one or more of Pb, Bi and T1. A preferred group of pyrochlore compounds which are included in the above formula are those having the following formula: EQU Pb.sub.2 [M.sub.2-x Pb.sub.x ]O.sub.7-y (2) wherein M is selected from the group consisting of Ru and Ir, wherein O.ltoreq.X.ltoreq.1.2 and O.ltoreq.y.ltoreq.1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.