Study on stability of combined ferrate solution

The stability of the combined ferrate in aqueous solution was studied by spectrophotometry and the cyclic voltammetry. The effects of environment temperature, placement time and amount of additive A were discussed in this paper. The results showed that the stability of the combined ferrate could be improved when a kind of additive A was added to the combined ferrate solution, and the temperature of reserving the combined ferrate solution was decreased. The decomposition rate of the combined ferrate in aqueous solutuin increased with increasing the placement time, and decreased with increasing the amount of additive A. The cycle voltammetric behavior of the combined ferrate in aqueous solution exhibited a one-way non-reversible reduction process. The reduction current decreased progressively with increasing the placement time of the combined ferrate, and with decreasing the effective concentration of FeO42- in aqueous solution.