【摘要】 在采用反胶束法制备PEMFC用Pt/C电催化剂时,比较了3种不同类型的表面活性剂,其中由阴离子表面活性剂十二烷基硫酸钠(SDS)组成的反胶束能制备出较小的Pt粒径,分布均匀的Pt/C电催化剂。降低反胶束中H2PtCl6水溶液的浓度,能减小催化剂中Pt的粒径,Pt(111)晶面间距也缩小,电催化活性提高。由该方法制备的Pt/C电催化剂的电化学性能与JohnsonMatthey公司的催化剂性能相当。由于反胶束法操作简便,所得催化剂粒径均匀,在PEMFC电催化剂制备方面具有较好的应用前景。更多还原

【Abstract】 Three different types of surfactants were investigated in the preparation of Pt / C electrocatalysts for proton exchange membrane fuel cell (PEMFC) by reverse micelles method. The reverse micelles composed of anionic surfactant SDS can be used to prepare Pt/C electrocatalysts with small and homogeneously distributed metal particles.When the concentration of H2PtCl6 solution was lower, Pt particle diameter became smaller and the distance of Pt (111) crystal facet became shorter, which was favorable for the improvement of its electrocatalytic activity. Pt/C electrocatalyst prepared by this method showed rather similar electrochemical performance to that from the commercial Pt / C electrocatalyst of Johnson Matthey. Because of the simplicity of operation, and the homogeneous distribution of Pt on carbon carrier of the prepared Pt / C electrocatalysts, the reverse micelles method could become a promising technique for the preparation of electrocatalysts in PEMFC utilization.更多还原