Metal electrodes and coatings thereof

Claim 2

A METALLIC ELECTRODE HAVING A CONDUCTIVE COATING, SAID COATING COMPRISING A COMPOUND OF THE GENERAL FORMULA A2BO6, WHEREIN A REPRESENTS AT LEAST ONE ELEMENT AT THE VALENCE 3, SELECTED FROM THE GROUP CONSISTING OF IR AND RH, AND B REPRESENTS AT LEAST ONE ELEMENT AT THE VALENCE 6, SELECTED FROM THE GROUP CONSISTING OF TE, W, MO AND RE.

Claim 3

A metallic electrode having a conductive coating as claimed in claim 1, wherein the said compound A2BO6 is rhodium tungstate, Rh2WO6.

Claim 4

A metallic electrode having a conductive coating as claimed in claim 1, wherein the said compound A2BO6 is rhodium tellurate, Rh2TeO6.

Claim 5

A metallic electrode having a conductive coating as claimed in claim 1, said conductive coating further comprising an oxide of MO2 type, where M represents at least one element at the valence 4 selected from the group consisting of Ir, Mn, Os, Rh, Ru, Sn, and Ti.

Claim 6

A metallic electrode having a conductive coating as claimed in claim 1, said conductive coating, further comprising an oxide of M''M''''04 type, where M'' represents at least one element at the valence 3 selected from the group consisting of Al, Cr, Fe, Ga, and Rh, and M'''' represents at least one element at the valence 5 selected from the group consisting of Nb, Sb, Ta, and V.

Claim 7

A metallic electrode having a conductive coating as claimed in claim 1 wherein B is at least partially Te.

Claim 8

A metallic electrode having a conductive coating, said coating comprising a compound of the general formula A2BO6, wherein A represents at least one element at the valence 3 selected from the group consisting of Co, Cr, Fe, Mn, Al, Ga and V, and B represents at least one element at the valence 6 selected from the group consisting of Te, W, Mo and Re, the said conductive coating further comprising at least one other compound containing at least one element selected from the group consisting of Ir, Os, Rh and Ru, said other compound being selected from the group consisting of MO2 and M''M''''O4 where: M represents at least one element at the valence 4 selected from the group consisting of Ir, Mn, Os, Rh, Ru, Sn and Ti M'' represents at least one element at the valence 3 selected from the group consisting of Al, Cr, Fe, Ga, and Rh M'''' represents at least one element at the valence 5 selected from the group consisting of Nb, Sb, Ta and V.

Claim 9

A metallic electrode having a conductive coating, said coating comprising a compound of the general formula A2BO6, wherein A represents at least one element at the valence 3 selected from the group consisting of Co, Cr, Fe, Mn, Al, Ga and V, and B represents at least one element at the valence 6 selected from the group consisting of Te, W, Mo and Re, the said conductive coating further comprising at least one other compound containing at least one element selected from the group consisting of Ir, Os, Rh and Ru, said other compound being selected from the group consisting of MO2 and M''M''''O4 where: M represents at least one element at the valence 4 selected from the group consisting of Ir, Mn, Os, Rh, Ru, Sn and Ti M'' represents at least one element at the valence 3 selected from the group consisting of Al, Cr, Fe, Ga, and Rh M'''' represents at least one element at the valence 5 selected from the group consisting of Nb, Sb, Ta and V.

Claim 10

An electrode suitable for use in electrochemical processes, comprising a support at least superficially containing titanium and having anodic polarization properties comparable with those of titanium, and on at least a part of the surface of said support a conductive coating comprising a compound of general formula A2BO6, wherein A represents one or more elements at valence 3 selected from the group consisting of Co, Cr, Fe, Mn, Al, Ga and V, and B represents at least one element at the valence 6 selected from the group consisting of Te, W, Mo and Re.

Claim 11

An electrode suitable for use in electrochemical processes, comprising a support at least superficially containing titanium and having anodic polarization properties comparable with those of titanium, and on at least a part of the surface of said support a conductive coating comprising a compound of general formula A2BO6, wherein A represents one or more elements at valence 3 selected from the group consisting of Co, Cr, Fe, Mn, Al, Ga and V, and B represents at least one element at the valence 6 selected from the group consisting of Te, W, Mo and Re.