Abstract
The adsorption behavior of sulfuric, hydrochloric, phosphoric and perchloric acid anions on a titanium oxide electrode in acid and alkaline solutions has been studied. The dependences of the extent of adsorption of the anions on the electrode potential, solution pH, adsorbate concentration and adsorption time have been measured. The presence of specific adsorption of the anions on a TiO 2 electrode has been proved. It has been found that the solution pH plays a leading role in anion adsorption rather than the electrode potential. The potential variation in the range 0.0–1.2 V has virtually no effect on the amount of adsorbed anions and the strength of their bond with the adsorbent surface. On the basis of the data on coadsorption of the anions examined obtained by the authors, the following adsorbability sequence is proposed: ClO 4 −<Cl −<HSO 4 −<H 2PO 4 −.
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