Supporter for fuel cell, method of preparing same, and electrode for fuel cell, membrane-electrode assembly for a fuel cell, and fuel cell system including same

Disclosed are a supporter for a fuel cell, a method of preparing the same, and an electrode for a fuel cell, a membrane-electrode assembly, and a fuel cell system including the same. The supporter includes a carbonaceous material and a transition metal oxide-included coating layer on a surface of the carbonaceous material, and the carbonaceous material and the transition metal oxide are covalently bonded.