Anodic reactions of several reducing agents on illuminated cadmium sulfide electrode
✍ Scribed by H. Minoura; M. Tsuiki
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 542 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
Abetract -Anodic reactions of several reducing agents occurring in competition with the electrode dissolution at an illuminated CdS electrode were studied under the potentiostatic condition. S* -, SO:-, and SzO$ -ions, which can effectively suppress the photoanodic dissolution of CdS, shift the flatband potential of this ekctrode to thecathodic direction, leading to the shift of the onset potential for the anodic photacurrcnt This shift is attributed to the adsorption of these ions OII the electrode surface. Two-or three-step wave appeared in the photoanodic polarization curves in the electrolytes containing low concentration of these ions. The mechanism for these electrodic reactions was discussed in detail in terms of the eaergy band structure. It can be concluded that the reducing agents which interact so strongly with the CdS electrode surface that the energy band structure at the electrode/electrolyte inthtlceischanged can suppress effectively the photoanodic dissolution of the electrode. The tendency of this interaction was s-1 so;-> szo:-.