Facile preparation of Bi nanoparticles by novel cathodic dispersion of bulk bismuth electrodes

摘要: Abstract A novel electrochemical approach has been developed to prepare clean bismuth nanoparticles (NPs) with a bulk Bi electrode in 0.5 mol dm −3 NaOH solution under highly cathodic polarization of −8 V versus saturated mercurous sulfate electrode, requiring no any precursor ions and organic protective agents. The can be facilely dispersed into NPs at the condition intensive hydrogen evolution. This dispersion involves formation decomposition unstable hydrides aggregation atomic from decomposition. Moreover, 2 O 3 have also achieved by heating NPs. Field-emission scanning electron microscopy, transmission microscope X-ray diffraction were used characterize these as-prepared mainly existed rhombohedral phase.