▎ 摘　　要

A novel porous PtCu film was prepared on an ionic liquid functionalized graphene film by electrodeposition and electrochemical oxidation. The porous PtCu film showed the features of alloy and had large active surface area. Its electrocatalytic activity was explored by taking ethanol as a model molecule, which exhibited sensitive oxidation peaks at the resulting electrode in H2SO4 solutions. Under the optimized conditions the oxidation current of ethanol at 0.65 V (vs SCE) was linear to its concentration in the range of 0.25-13 mM, the sensitivity was 11 mu A mM(-1)cm(-2) and the detection limit was 0.05 mM (S/N=3). The electrode was successfully applied to the determination of ethanol in alcoholic samples.