Method for manufacturing core-shell type supported catalysts and core-shell type supported catalysts formed thereby

A method for manufacturing a core-shell type supported catalyst, wherein alloy particles having a core-shell structure with a different interior and exterior are supported on a complex carbon support. The method includes: 1) dissolving and dispersing a carbon support in a solvent using a stabilizer; 2) dissolving a core precursor in the solution, and adding a strong reducing agent to reduce and support a transition metal of the core precursor on a surface of the carbon support; 3) filtering and washing the carbon support on which the transition metal is supported; 4) re-dispersing the filtered and washed carbon support in a shell precursor aqueous solution; and 5) adding a weak reducing agent to the solution of step 4) at 60-80 DEG C. so that metal ions of a shell precursor are selectively reduced and deposited on the transition metal.