TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Properties: The component (M) is in the form of foil or powder, preferably dendritic or scale-like powder. Preferred Process: The process of substituting surface of the composite of the component (M) and substance (S), whose surface is substituted with a metal that functions as a catalyst is obtained using a coating material containing substance (S), by the following process:(1) applying a coating material containing substance (S) on a component (M) to form a coating film, and contacting the coating film with a metal ion whose ionization tendency is smaller than the metal of component (M);(2) forming a coating film using a coating material comprising component (M) and substance (S), and contacting the coating film with the metal ion whose ionization tendency is smaller than the metal of component (M);(3) forming a coating film using the coating material comprising component (M) and metal ion whose ionization tendency is smaller than the metal of the component (M), on a substance (S); and(4) forming a coating film using the coating material comprising reaction product of component (M) with metal ion whose ionization tendency is smaller than the metal of the component (M), on substance (S).The method of removing the component (M) is based on dissolution. The composite obtained by compounding the component (M) and substance (S) is contacted with a solution of mixed solvent comprising water-soluble organic solvent and water, or water-soluble organic solvent. Alternately, the catalyst supporting electrode is manufactured by: (i) coating material obtained by blending substance (S) and a metal powder, is directly applied on a base material such as high polymer film, and transferred to an electrolyte film or gaseous diffusion layer, or a process which involves sticking the obtained coating film to an electrolytic film or gaseous diffusion layer with a metallic foil after applying the coating material formed by mixing metal powder and non-metallic electroconductive substance depending on necessity of metallic foil; (ii) the process which precipitates the metal that functions as a catalyst on a coating film, or the metal powder or metallic foil in the layer obtained by transfer by contacting the coating film or the layer obtained by transfer with the solution containing metal ion whose ionization tendency is smaller than the metal, and functions as catalyst; and (iii) process which removes the metal powder or metallic foil. Alternately, the catalyst supporting electrode is manufactured by: (i) coating material formed by mixing non-metallic electroconductive substance and a metal powder, is once applied on a base material such as high polymer film, or the process which applies the coating material formed by mixing a metal powder and a non-metallic electroconductive substance depending on necessity to metallic foil; (ii) the metal that functions on a metallic foil as a catalyst, is precipitated by contacting with metal powder in a coating film, or a coating film where the obtained film is contacted with the solution containing metal ions whose ionization tendency is smaller than the metal, and the metal functions as catalyst; (iii) the process that transfers or sticks the coating film to an electrolyte film or a gaseous-diffusion layer; and (iv) process which removes the metal powder or metallic foil. Alternately, the catalyst supporting electrode is obtained by: (i) coating material formed by mixing a substance (S), a metal powder and the metal ion, is directly applied to an electrolyte film or a gaseous diffusion layer, or after applying to base material such as high polymer film, the coating material is transferred to an electrolyte film or a gaseous diffusion layer, or by sticking the coating film obtained by applying to a metallic foil the coating material formed by making the metal ion that functions as a non-metallic electroconductive substance and catalyst, and blending a metal powder depending on necessity to an electrolyte film or a gaseous diffusion layer with metallic foil. The process which makes the metal that functions on the metal powder or metallic foil surface in a layer, as a catalyst is precipitated; and (ii) process which removes the metal powder or metallic foil.