Abstract: Provided is a catalyst having excellent gas transportability. Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

Abstract: [Object] Provided is a catalyst having excellent gas transportability. [Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

Abstract: Provided is a catalyst having excellent gas transportability. Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.

Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.

Abstract: [Object] Provided is a catalyst having excellent gas transportability. [Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.

Abstract: [Object] Provided is a catalyst having an excellent gas transportability. [Solving Means] Disclosed is a catalyst including a catalyst metal and a support, wherein the catalyst includes pores having a radius of 1 nm or more and less than 5 nm, a pore volume of the pores is 0.8 cc/g support or more, and the catalyst metal has a specific surface area of 30 m2/g support or less.

Abstract: Object Provided is a catalyst having an excellent durability and being capable of lowering the cost of a fuel cell. Solving Means Disclosed is a catalyst configured to include a support and alloy particles including platinum and a metal component other than platinum supported on the support, wherein the catalyst includes mesopores having a radius of 1 to 10 nm originated from the support, wherein a mode radius of the mesopores is in a range of 2.5 to 10 nm, and wherein the alloy particles have a catalyst function, and at least a portion of the alloy particles is supported inside the mesopores.