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Photoactivated Fe(III)/Fe(II)/WO3–Pd fuel cell for electricity generation using synthetic and real effluents under visible light

Author

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  • Russo, Danilo
  • Muscetta, Marica
  • Clarizia, Laura
  • Di Somma, Ilaria
  • Garlisi, Corrado
  • Marotta, Raffaele
  • Palmisano, Giovanni
  • Andreozzi, Roberto

Abstract

Solar energy exploitation is one of the most challenging applications for sustainable energy production. In this work a photoactivated fuel cell was developed, using visible light and the Fe(III)/Fe(II) redox couple for the simultaneous production of electrical energy and oxidation of polluting organics (alcohols) contained in synthetic and real wastewaters. WO3 was selected as a cheap and environmentally friendly photocatalyst more efficient than TiO2 (i) under visible light irradiation and (ii) in the presence of in-situ photodeposited Pd. Pd photodeposition was found to reduce the band gap of bare WO3, thus increasing visible light capture and limiting the occurrence of photogenerated hole/electron recombination. Higher photocatalytic performances were recorded over WO3–Pd compared to TiO2 and bare WO3, despite the low BET superficial area of WO3–Pd (2.34 m2 g−1). Optimal conditions were identified at pH = 2.0 with 2% w/w Pd load. The results also evidenced the influence of the selected sacrificial organics and water matrices. A quantum yield of 84.89% and an energy efficiency of 4.15% were the best results achieved so far for the proposed system. The present photoelectrochemical cell offers a very promising system for electrical energy production by using wastewater from wine manufacturing industry and solar light radiation.

Suggested Citation

  • Russo, Danilo & Muscetta, Marica & Clarizia, Laura & Di Somma, Ilaria & Garlisi, Corrado & Marotta, Raffaele & Palmisano, Giovanni & Andreozzi, Roberto, 2020. "Photoactivated Fe(III)/Fe(II)/WO3–Pd fuel cell for electricity generation using synthetic and real effluents under visible light," Renewable Energy, Elsevier, vol. 147(P1), pages 1070-1081.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p1:p:1070-1081
    DOI: 10.1016/j.renene.2019.09.080
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    References listed on IDEAS

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    1. Rodríguez-Caballero, Carlos Vladimir & Ventosa-Santaulària, Daniel, 2017. "Energy-growth long-term relationship under structural breaks. Evidence from Canada, 17 Latin American economies and the USA," Energy Economics, Elsevier, vol. 61(C), pages 121-134.
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