固相反应制备Pt/C催化剂及其对甲醇的电催化氧化

Preparation of Pt/C Catalyst with Solid Phase Reaction Method and its Electrocatalytic Activity for Methanol Oxidation

运用固相反应方法制备得Pt质量分数为 2 0 %的Pt/C催化剂 ,并通过X射线衍射、透射电镜和电化学分析方法比较了制得的催化剂与E TEK公司Pt/C催化剂、传统液相反应方法制得的Pt/C催化剂间的性能差别 .结果表明 :运用固相反应方法和传统液相化学反应方法制得的Pt/C催化剂中 ,Pt粒子的平均粒径分别为 3 8nm和 8 5nm ;并且 ,利用固相反应方法制得的Pt/C催化剂拥有较高的电化学活性面积 ,其对甲醇的电催化氧化活性和稳定性与E TEK公司的Pt/C催化剂相当 ,远远优于传统的液相反应方法制得的Pt/C催化剂 .

The Pt/C catalyst was prepared with solid phase reaction method.The charateristics of this catalyst were compared with the Pt/C catalyst of E TEK Co.and that prepared with traditional liquid phase reaction method by means of X ray diffraction,transmission electron microscopy and electrochemical analysis.The results indicated that the average diameter of Pt particles of the Pt/C catalyst prepared in this work and the liquid phase reaction method was about 3 8?nm and 8 5?nm,respectively.Furthermore,the Pt/C catalyst prepared in this study possessed high electrochemical active area.Its electrocatalytic activity for the methanol oxidation was almost the same as that E TEK Pt/C catalyst and much better than that of the Pt/C catalyst prepared with the traditional liquid phase reaction method.