Catalysts for oxidation and reduction
AssigneeJohnson Matthey PLC
InventorsArthur G. Knapton, Ian R. McGill
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Abstract
A catalyst suitable for use in oxidation and reduction reactions is provided. The catalyst includes an intermetallic compound of Ru, Pd, Ir or Pt and one or more base metals coated upon a substrate.
Claims17
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of TiPt.sub.3, LnPd, LnPd.sub.3, Ln.sub.5 Pd.sub.2 (where Ln=Sm, Gd, Dy, Ho and Er), TaIr.sub.3, NbIr.sub.3, TaPd, TiRu, NbIr, TaRh.sub.3, NbRh.sub.3, VIr.sub.3 and CeRu.sub.2.
A process of making a supported catalyst wherein the substrate comprises interwoven platinum wire, the process comprising heating the substrate at an elevated temperature in an aluminising environment containing Al.sub.2 O.sub.3 and NH.sub.4 Cl so as to produce an intermetallic compound of, PtAl.sub.2 on the surface of the said wire.
A catalyst comprising a substrate carrying a coating comprising an intermetallic compound of at least one of the platinum group metals ruthenium, rhodium, palladium, iridium and platinum and one or more base metals, selected from Ta, Nb, Zr, Hf and V, said catalyst being characterized by its high thermodynamic stability and high catalytic efficiency.
A catalyst suitable for use in oxidation and reduction reactions comprising a substrate carrying a coating comprising at least one intermetallic compound selected from the group consisting of intermetallic compounds of Ta and Rh, Ta, and Ir, Nb and Rh and Nb and Ir.
Dependencies are inferred from the claim text.