作者: M. Lei , C. Liang , Y.J. Wang , K. Huang , C.X. Ye
DOI: 10.1016/J.ELECTACTA.2013.09.119
关键词: Graphene 、 Hydrogen desorption 、 Materials science 、 Proton exchange membrane fuel cell 、 Catalysis 、 Inorganic chemistry 、 Electrocatalyst 、 Molecule 、 Electrochemistry 、 Platinum
摘要: Abstract High performance and electrochemically stable Pt/graphene catalysts assisted with polydiallyldimethylammonium (PDDA) have been synthesized for PEM fuel cells. The preparation procedure properties of the are investigated in detail. With introduction PDDA molecules, Pt nanoparticles can be well-dispersed on graphene support, resulting improved electrochemical surface area enhanced electrocatalytic activity. corresponding areas (ECSA) catalyst layers calculated from hydrogen desorption peak cyclic voltammogram curves 78.3, 72.5 73.6 cm 2 g −1 Pt/graphene, Pt-PDDA/graphene, Pt/graphene-PDDA catalysts, respectively. Both modified supports also exhibit high durability toward oxidation cycles compared conventional produced at same conditions. After 3000 cycles, only 23.52% initial ECSA remains electrocatalyst whereas 43.04% 37.7% Pt-PDDA/graphene remain,