ION-CONDUCTING MEMBRANE STRUCTURES
An ion-conducting membrane structure comprising (i) an ion-conducting membrane wherein said membrane has a first face and a second face, (ii) a first hydrogen peroxide decomposition catalyst and (iii) a first radical scavenger, wherein the first hydrogen peroxide decomposition catalyst is in a first layer on the first face of the ion-conducting membrane in an amount from 0.01 to 15 μg/cm 2 or the first hydrogen peroxide decomposition catalyst in embedded within the ion-conducting membrane in an amount from 0.001 to 5% by weight is disclosed.
1 . An ion-conducting membrane structure comprising (i) an ion-conducting membrane wherein said membrane has a first face and a second face, (ii) a first hydrogen peroxide decomposition catalyst selected from the group of metal oxides and (iii) a first radical scavenger, wherein the first hydrogen peroxide decomposition catalyst is in a first layer on the first face of the ion-conducting membrane in an amount from 0.01 to 15 μg/cm 2 or the first hydrogen peroxide decomposition catalyst is embedded within the ion-conducting membrane in an amount from 0.001 to 5% by weight and wherein the first hydrogen peroxide decomposition catalyst in the first layer has a continuous uniform loading in the x-y direction.
2 . An ion-conducting membrane structure according to claim 1 , wherein the first hydrogen peroxide decomposition catalyst is in the first layer on the first face of the ion-conducting membrane.
3 - 9 . (canceled)
10 . An ion-conducting membrane structure according to claim 1 , wherein the first hydrogen peroxide decomposition catalyst is embedded within the ion-conducting membrane.
11 . An ion-conducting membrane structure according to claim 1 , wherein the first radical scavenger is in a first layer on the first face of the ion-conducting membrane.
12 . An ion-conducting membrane structure according to claim 1 , wherein the first radical scavenger is embedded within the ion-conducting membrane.
13 . (canceled)
14 . (canceled)
15 . An ion-conducting membrane structure according to claim 1 , wherein the ion-conducting membrane structure further comprises one or more second hydrogen peroxide decomposition catalysts.
16 - 18 . (canceled)
19 . An ion-conducting membrane structure according to claim 1 , wherein the ion-conducting membrane structure further comprises one or more second radical scavengers.
20 - 22 . (canceled)
23 . A catalyst-coated ion-conducting membrane structure comprising an ion-conducting membrane structure according to claim 1 and an electrocatalyst layer deposited on at least one side of the ion-conducting membrane structure
24 . A membrane electrode assembly comprising an ion-conducting membrane structure according to claim 1 .
25 . A membrane electrode assembly comprising a catalyst coated ion-conducting membrane structure according to claim 23 .
26 . A fuel cell comprising an ion-conducting membrane structure according to claim 1 .
27 . A fuel cell comprising a catalyst coated ion-conducting membrane structure according to claim 23 .
28 . A fuel cell comprising a membrane electrode assembly according to claim 24 .
29 . A fuel cell comprising a membrane electrode assembly according to claim 25 .