Platinum/Carbon(Pt/C) Specification Pt 1.5, Pt 101, Pt 103, Pt 105, Pt 110 Noble metal 0.5%?0.1%, 1%?0.2%, 3%?0.2%, 5%? 0.2%, 10%?0.2% Specific surface area(m2/g) âÂ¥950 Metal surface area(m2/g) 85~105 Mean diameter of carrier(?m) 15, 20, 30, 50, 80 Impurity(m%) ...