Fuel cell catalyst layer, and fuel cell
The fuel cell catalyst layer has: a catalyst including a carbon support having pores with a pore diameter of from 1 nm to 5 nm and a catalyst metal supported within the pores of the carbon support; and an ionomer having a glass transition temperature equal to or greater than 160° C.
1. A fuel cell catalyst layer comprising:
a catalyst comprising
a carbon support comprising pores with a pore diameter of from 1 nm to 5 nm, and
a catalyst metal supported at least within the pores of the carbon support having the pore diameter of from 1 nm to 5 nm; and
an ionomer having a glass transition temperature equal to or greater than 160° C.,
wherein a pore volume of the pores with the pore diameter of from 1 nm to 5 nm is equal to or greater than 15.0 mL/g,
wherein the carbon support further comprises pores with a pore diameter greater than 5 nm and 10 nm or less, and
wherein a pore volume of the pores with the pore diameter greater than 5 nm and 10 nm or less is from 1 mL/g to 10 mL/g.
2. The fuel cell catalyst layer according to claim 1 , wherein the ionomer has an oxygen permeability equal to or greater than 2.0×10-14 mol/m/sec/Pa in an environment at a temperature of 800 C and a relative humidity of 30%.
3. A fuel cell comprising the fuel cell catalyst layer according to claim 1 .