Electrochemical property research of nickel nanopowders prepared under ultrasonic field

The property of nickel powders was researched prepared in organic ethylene glycol solutions under ul- trasonic field.The elements of nickel powders were analyzed by the X-ray diffraction and the micro-morphology was characterized with scanning electron microscopy and transmission electron microscopy.Cyclic voltammetry experiments were done on nickel electrodes.It was showed that the particle parameter of the nickel powders was smaller and the dispersion was better prepared in ultrasonic field compared to without ultrasonic field.Nickel e- lectrodes were prepared by pressing powders prepared in ultrasonic field and the experiments of cyclic voltam- metry were done in the lmol/L KOH solutions containing ethanol.Compared to without containing ethanol,oxi- dation peak current was bigger,but reduction peak current was smaller.This showed that nickel powders pro- duced under ultrasonic field was a better catalyst for ethanol's oxidation-reduction reaction.Then compared to pure nickel block electrodes,nickel nanopowders electrodes had higher electrochemical activities.