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- W827230869 abstract "We report the fabrication of p-type silicon (Si) photocathodes consisting of well-ordered Si microwire (Si-MW) arrays coupled with non-precious and earth-abundant amorphous oxygen-rich molybdenum oxysulfide (MoOxSy) as both a hydrogen evolution catalyst and a passivation layer. The MoOxSy is conformally grown on the Si-MW surface through photo-assisted cyclic voltammetric (CV) deposition. By adjusting the cycle numbers of the CV deposition, Si-MW array electrodes with different MoOxSy catalyst loadings ([email protected]xSy) have been obtained and comprehensively characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman and Fourier-transform infrared spectroscopies. The photoelectrochemical performance of the [email protected]xSy cathodes toward water reduction is investigated and compared with that of platinum nanoparticle decorated Si-MW array electrodes ([email protected]). An optimized [email protected]xSy photocathode is found to exhibit activity comparable to that of the [email protected] one, with a much better stability in acidic medium. In neutral electrolyte, [email protected]xSy outperforms [email protected] in terms of both activity and stability. Given the low materials cost, easy and well-established electrode fabrication procedure, and high demonstrated photoelectrochemical performance, the [email protected]xSy arrays reported here hold substantial promise for use as low-cost and efficient photocathodes for water reduction." @default.
- W827230869 created "2016-06-24" @default.
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- W827230869 date "2015-09-01" @default.
- W827230869 modified "2023-09-23" @default.
- W827230869 title "Amorphous oxygen-rich molybdenum oxysulfide Decorated p-type silicon microwire Arrays for efficient photoelectrochemical water reduction" @default.
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- W827230869 doi "https://doi.org/10.1016/j.nanoen.2015.06.014" @default.
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