摘要

In the original publication of this paper, Sect. 2.1 the line starting with “in which the A cell solution is 5-15 mM ZnSO<inf>4</inf>and B cell solutions is 0.25 M NaOH”is published incorrectly. The corrected line should read as “in the A cell solution is 0.25 M NaOH and B cell solutions is 5-15 mM ZnSO<inf>4</inf>”In Fig. 1, the left solution should be NaOH and the right solution is ZnSO<inf>4</inf>. The corrected figure is provided in this erratum. (Figure presented.).