期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 2, 期 24, 页码 3016-3020出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz2014314
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资金
- Swedish Energy Agency
- Knut and Alice Wallenberg Foundation
- Swedish Research Council
- STandUP for Energy program
Photomodulated voltammetry was used to determine the redox potentials of the diiodide radical (I-2(-center dot)) in water, acetonitrile, and 3-methoxypropionitrile. Iodide/triiodide redox electrolytes were exposed to modulated blue light, resulting in I-2(-center dot) generation. Using transparent fluorine-doped tinoxide (FTO) electrodes, two modulated photocurrent waves could be discerned in the voltammogram, from which the formal potentials for oxidation and reduction reactions of the diiodide radical were determined. E-0'(I-2(-center dot)/I-) was found to be +0.79 and +1.04 V versus NHE in acetonitrile and water, respectively. These values give guidelines for E-0'(D+/D) required for efficient regeneration of dyes used in dye-sensitized solar cells
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