Provided is a supported catalyst for a fuel cell, containing a conductive support and a platinum alloy supported thereby, wherein an elution ratio of transition metal other than platinum is 30% or less when 0.5 g of the supported catalyst is stirred at room temperature in 30 mL of 0.1N
A hydrogen containing material comprises a first compound including hydrogen containing material and fluoride, and a second compound including a metal which becomes highly reactive with hydrogen when the metal becomes a compound including fluorine, and a compound including fluorine. The
