Effect of ammonium ions on the electroreduction of anions at a mercury electrodeстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The effect of ammonium ions on the electroreduction of peroxodisulfate (S2O82-) and perbromate (BrO4-) anions is found to be commensurate with that of potassium ions. Ammonium ions accelerate the reduction of iodate (IO3-), bromate (BrO3-), and chromate (CrO42-) anions in nonbuffered solutions and does not, in buffered ones. In the former case, the effect is connected with the pH change in the near-electrode layer during the reaction and with the participation of ammonium ions in hydrolytic equilibriums, rather than with a simultaneous transfer of ammonium ions and electrons in an elementary act. The conclusions in the literature in favor of a simultaneous transfer of the proton and electron in the proton-consuming reactions of reduction of anions is shown to be ambiguous.