ChemInform Abstract: Efficient Solar Water Splitting, Exemplified by RuO₂‐Catalyzed AlGaAs/Si Photoelectrolysis.

Abstract

Efficient Solar Water Splitting, Exemplified by RuO 2 -Catalyzed Al-GaAs/Si Photoelectrolysis.-A solar photoelectrolysis cell containing AlGaAs/Si RuO 2 /Pt black is demonstrated to drive sustained water splitting at 18.3% conversion efficiency. This value is higher than the efficiencies predicted by the principal solar water splitting models. -(LICHT, S.; WANG, B.; MUKERJI, S.; SOGA, T.; UMENO, M.; TRIBUTSCH, H.; J.

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Air-based photoelectrochemical cell capturing water molecules from ambient air for hydrogen production

“…The prospect of solar hydrogen as a sustainable energy source spurs steady progress toward efficient materials for water splitting. [1][2][3][4][5][6] While current systems run on liquid water, the idea of feeding water contained in ambient air to a solar water splitting device is appealing. The imaginative concept has been proposed recently by Dionigi et al 7 and Xiang et al 8 These authors argued that vapor phase water photoelectrolysis avoids deleterious effects associated with bubble formation in aqueous medium.…”

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“…Namely, at the bias potential of 0 V versus Ag/AgCl, the photocurrent has increased to 1.2 mA cm À2 from the initial value of 0.1 mA cm À2 , simply because of the surface modification. Efficiency of the light-induced hydrogen generation, which is measured as the STH conversion efficiency, was estimated using the equation [28] STH ¼…”