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- W1966134601 abstract "Abstract The hydrogen generation from photoelectrochemical (PEC) water splitting under visible light was investigated using large area tungsten oxide (WO 3 ) photoanodes. The photoanodes for PEC hydrogen generation were prepared by screen printing WO 3 films having typical active areas of 0.36, 4.8 and 130 cm 2 onto the conducting fluorine-doped tin oxide (FTO) substrates with and without embedded inter-connected Ag grid lines. TiO 2 based dye-sensitized solar cell was also fabricated to provide the required external bias to the photoanodes for water splitting. The structural and morphological properties of the WO 3 films were studied before scaling up the area of photoanodes. The screen printed WO 3 film sintered at 500 °C for 30 min crystallized in a monoclinic crystal structure, which is the most useful phase for water splitting. Such WO 3 film revealed nanocrystalline and porous morphology with grain size of ∼70–90 nm. WO 3 photoanode coated on Ag grid embedded FTO substrate exhibited almost two-fold degree of photocurrent density enhancement than that on bare FTO substrate under 1 SUN illumination in 0.5 M H 2 SO 4 electrolyte. With such enhancement, the calculated solar-to-hydrogen conversion efficiencies under 1 SUN were 3.24% and ∼2% at 1.23 V for small (0.36 cm 2 ) and large (4.8 cm 2 ) area WO 3 photoanodes, respectively. The rate of hydrogen generation for large area photoanode (130.56 cm 2 ) was 3 mL/min." @default.
- W1966134601 created "2016-06-24" @default.
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- W1966134601 date "2011-05-01" @default.
- W1966134601 modified "2023-10-10" @default.
- W1966134601 title "Ag grid induced photocurrent enhancement in WO3 photoanodes and their scale-up performance toward photoelectrochemical H2 generation" @default.
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- W1966134601 doi "https://doi.org/10.1016/j.ijhydene.2011.02.013" @default.
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