| 초록 |
Graphene is one-atom thick two-dimensional atomic crystal having sp2 carbon atoms in the honeycomb crystal lattice. It has unique physical properties such as high carrier mobility, mechanical strength, elasticity, and Young’s modulus. Heteroatom-doped graphene has demonstrated high electrocatalytic activity as metal-free cathode in fuel cell (FC), which is an electrochemical cell that converts chemical energy into electric energy. However, the syntheses of heteroatom-doped graphene involve tedious procedures and harsh conditions. Hence, to replace existing precious metal-based FC catalysts, we study poly(pyridinium salt)/graphene (PSS/G) composites as a low cost and high performance metal-free electrocatalysts for oxygen reduction reaction (ORR) in FC. The PPS can play as not only dispersing agent for graphite into graphene by π-π interactions with graphitic layers, but also intermolecular charge transfer agent with high electrochemical stability to facilitate efficient ORR. |
