Cathode catalyst for fuel cell, membrane-electrode assembly for fuel cell including same and fuel cell system including same

摘要

A cathode catalyst including Ru-Ch having a skeletal structure. The Ch includes a material selected from the group consisting of S, Se, Te, and combinations thereof. The Ru-Ch may include from about 40 to about 95 atom % of Ru, and from about 5 to about 60 atom % of Ch; or from about 50 to about 70 atom % of Ru, and from about 30 to about 50 atom % of Ch. The skeletal structure may include a plurality of ruthenium tubes having a three-dimensionally connected network, and the Ch may be connected to the ruthenium tubes. The skeletal structure of the Ru-Ch may be formed using a RuM alloy, where M is a material selected from the group consisting of Al, Mg, and combinations thereof.