Catalyst for polymer solid electrolyte fuel cell, membrane electrode assembly, and fuel cell

摘要

There is provided a catalyst for a fuel cell, which simultaneously realizes excellent catalytic activity and catalytic stability. The catalyst for a fuel cell comprises a fine particle of a metal represented by formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒPt x Ru y Si z T1 u
wherein T1 represents at least one element selected from the group consisting of nickel (Ni), tungsten (W), vanadium (V), and molybdenum (Mo); x = 30 to 90 atomic%; y = 0 to 50 atomic%; z = 0.5 to 20 atomic%; and u = 0.5 to 40 atomic%, or comprises a fine particle of a metal represented by formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒPt x Ru y Si z T2 u
wherein T2 represents at least one element selected from the group consisting of hafnium (Hf), tin (Sn), zirconium (Zr), niobium (Nb), titanium (Ti), tantalum (Ta), chromium (Cr), and aluminum (Al); x = 30 to 90 atomic%; y = 0 to 50 atomic%; z = 0.5 to 20 atomic%; and u = 0.5 to 40 atomic%.