Electrode structure
AssigneeJohnson Matthey Public Limited Company
InventorsSusan Joy Cooper, Gregor Hoogers
Life of this patent
Estimating the term…
Abstract
A poison tolerant anode structure for use in fuel cells, in particular suitable for use on proton exchange membrane fuel cells, comprising a first catalytic component Pt—Y where Y is a bronze forming element, and optionally a third metal X alloyed with the platinum, and a second catalytic component Pt—M where M, metal, is alloyed with the platinum. An anode, a catalysed membrane, a membrane electrode assembly and a fuel cell comprising the electrode structure, are disclosed.
Claims11
An electrode structure comprising a first catalytic component and a second catalytic component, wherein:
- (a) said first catalytic component comprises one or more electrocatalyst(s) comprising a formula Pt—Y, wherein Y is Mo, W or an oxide of Mo or W;
- and
- (b) said second catalytic component comprises one or more electrocatalyst(s) comprising a formula Pt—M, where M is a metal alloyed with the platinum and is one or more metals selected from the group consisting of Ru, Rh, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ga, Zr, Hf and Sn;
- and
- wherein the first and second catalytic components are formulated into two separate layers that are functionally linked and are in ionic contact with each other.
A fuel cell comprising an electrode structure, comprising a first catalytic component and a second catalytic component, characterized in that the first catalytic component comprises one or more electrocatalyst(s) comprising a formula Pt—Y where Y is Mo, W, or an oxide of Mo or W, and the second catalytic component comprises one or more electrocatalyst(s) comprising a formula Pt—M, where M is a metal alloyed with the platinum and is one or more metals selected from the group consisting of Ru, Rh, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ga, Zr, Hf and Sn, and wherein the first and second catalytic components are formulated into two separate layers that are functionally linked and are in ionic contact with each other.
Dependencies are inferred from the claim text.