CoNi alloy nanoparticles were synthesized on glassy carbon(GC)electrode(CoNi/GC)by electrochemical deposition.SEM images showed that the prepared CoNi alloy nanoparticles were 18-facet polyhedra with an average particles size of 100 nm,dispersed on the GC electrode surfaces uniformly.The selected area electron diffraction(SAED)pattern showed that CoNi alloy nanoparticles were single crystals.X-ray photoelectron spectroscopy(XPS)showed that the Co(0)and Ni(0)were dominant.The electrocatalytical activities fo...