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Заглавие документа: | Bismuth oxysulfide photoelectrodes with giant incident photon-to-current conversion efficiency: chemical stability in aqueous solutions |
Авторы: | Bondarenko, E. A. Streltsov, Е. А. Mazanik, A. V. Kulak, A. I. |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2-мая-2019 |
Издатель: | John Wiley and Sons Ltd |
Библиографическое описание источника: | ChemElectroChem. – 2019. – Vol. 6. – P. 2474–2481 |
Аннотация: | Bismuth oxysulfide (BOS) films demonstrate giant incident photon-to-current conversion efficiency (IPCE >> 100%) under cathodic polarization. Their photoelectrochemical behavior and corrosion stability in aqueous solutions containing different redox systems ([Fe(CN)6]3–/[Fe(CN)6]4–, Fe3+/Fe2+, I2/I–, Sn2–/S2–) has been investigated. We established that the chemical stability of the BOS is controlled mainly by three factors: (i) potentials of cathodic and anodic destruction of the BOS (Bi3+ reduction and S2– oxidation), (ii) protolytic reactions leading to the dissolution of the semiconductor in acidic solutions at рН < 3, (iii) presence in solutions of anions, capable to participate in ion exchange reactions with the semiconductor forming poorly soluble compounds (K[BiFe(CN)6]·3H2O, BiOI and Bi2S3). The enrichment of the BOS surface with sulfur atoms (formation of S-terminated surface) gives rise to the substantial increase in the electrocatalytic activity of [Fe(CN)6]3– cathodic reduction, which is accompanied by up to order increase of IPCE. |
URI документа: | http://elib.bsu.by/handle/123456789/232327 |
Располагается в коллекциях: | Кафедра физики твердого тела и нанотехнологий (статьи) |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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Manuscript for BSU library.pdf | 2,29 MB | Adobe PDF | Открыть |
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