NOVELTY - An electrocatalyst for fuel cells, comprises support body (22) resistant to carbon monoxide poisoning, and activated metal (21) adsorbed on a surface of the support body consisting mainly of carbon, where the support body has pores penetrating into an interior to form a porous support body. The activated metal is adsorbed and reduced onto an outer surface of the porous support body and an inner surface of the pores.    USE - For fuel cells (claimed) used for directly converting chemical energy produced by oxidation of fuels to electrical energy.    ADVANTAGE - The carbon monoxide does not fundamentally come in contact with the activated metal adsorbed to the inner surface of the pores of the support body, thus minimizing degradation of fuel cell performance and thus overcoming fuel-feeding problems.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (a) a method of making an electrocatalyst for fuel cells using a support body resistant to carbon monoxide poisoning, comprising providing an activated metal; providing a support body consisting mainly of carbon, where the support body has pores penetrating into an interior thereof to form a porous support body; adsorbing the activated metal onto an outer surface of the porous support body and an inner surface of the pores; and reducing the activated metal on the outer surface of the porous support body and the inner surface of the pores; and    (b) a method of reducing degradation of an electrocatalyst for fuel cells as a result of carbon monoxide poisoning, comprising providing an electrocatalyst having activated metal adsorbed on a surface of a support body consisting mainly of carbon, the support body having pores penetrating into an interior to form a porous support body, the pores having a diameter larger than the kinetic diameter of a hydrogen molecule diameter and smaller than the kinetic diameter of a carbon monoxide molecule, the activated metal being adsorbed and reduced onto an outer surface of the porous support body and an inner surface of the pores; exposing the electrocatalyst to a fuel gas comprising hydrogen and carbon monoxide; and contacting the hydrogen in the fuel gas with the reduced activated metal adsorbed onto the outer surface of the porous support body and the inner surface of the pores while preventing substantial contact of the carbon dioxide in the fuel gas with the reduced activated metal adsorbed onto the inner surface of the pores.    DESCRIPTION OF DRAWING(S) - The figure is a cross-sectional view showing a structure of an electrocatalyst adsorbed with an activated metal, resistant to carbon monoxide poisoning.    Activated metal (21)    Support body (22)