Effect of Raw Material Propotions on Performance of Ag/AgX Reference Electrode

Ag/AgX reference electrodes with different AgCl/AgBr ratios were prepared by thermal-dipcoating mothed.SEM observation showed that there was no connection between the surface morphology of electrode and the ratio.The XRD patterns showed that the type of AgX crystal was cerargyrite.Testing of potential stability and anti-polarization ability indicated that AgCl/ AgBr ratio had some effect on the performance of Ag/AgX electrode.The internal resistance and polarization resistance of the reference electrode decreased with the decrease of AgBr and the performance of the Ag/AgX reference electrode was the best when the ratio of AgCl/AgBr was 77/23.The potential shift of AgCl/AgBr electrode was smaller than that of Ag/AgCl electrode.