Electrode catalyst layer using a catalyst and a manufacturing method thereof, and the catalyst

An object of the present invention is to provide a catalyst having a high catalytic activity. The present invention provides a catalyst comprising a catalytic metal to be supported on the catalyst carrier and the catalyst support, the catalyst support is the radius has pores and radius 1nm or more pores of less than 1nm, the radius is less than 1nm the surface area formed by the pores, the and the radius 1nm or more vacancies in the surface area than is formed, and the catalyst having an average particle diameter of the catalyst metal is equal to or more than 2.8 nm. .FIELD 2