NiAl, CoAl and MgAl hydrotalcite ( NiAl-HT, CoAl-HT, MgAl-HT) with Ni/Al, Co/Al and Mg/Al molar ratios of 3 were synthesized by coprecipitation. The electrochemical behaviors of the hydrotalcite-modified electrodes were studied by cyclic voltammetry. The results showed that only the electrode modified with NiAl-HT exhibited preferable electrochemical behaviors and the electrochemical behaviors of ...