Photocatalytic CO2 reduction to methanol over bismuth promoted BaTiO3 perovskite nanoparticle catalysts

Venkata D.B.C. Dasireddy and Blaž Likozar

Renewable Energy, 2022, vol. 195, issue C, 885-895

Abstract: The photocatalytic reduction reactions of CO2 to methanol over bismuth-promoted BaTiO3 chemical photo-catalyst were reported for the first measurement time. Catalysts were prepared via single step deposition precipitation/solution combustion technique. Phases/morphology were characterised by powder X-ray diffraction (XRD)/scanning electron microscopy (SEM). Light absorption spectrum/bandgap energy (Eg) was calculated using ultraviolet–visible (UV–Vis) wavelength diffuse reflectance spectroscopy. The addition of Ba/Bi increased Eg. Comparing materials, synthesised by combusting, the latter showed a surface high basicity/water adsorption. Tests indicated the formation of alcohols. Bi-containing also demonstrated CO. No CH3OH was found for precipitated though. Activity resulted from the synergetic relationship effect between Bi/Ti, caused by the charge transfer mechanism between these component species, strong interaction phenomena and recombination. All were stable for a long temporal period. In the presence of the Ba or Bi metals over titania, the electrons (e–) from TiO2 form an e––hole pair separation, prolonging their decay lifetime. Ba/Bi-based TiO2 presented produced a CH3OH yield of 5.95 μmol gcat−1 h−1, higher compared to structured catalytic systems, described in specific literature reports. As opposed to hydrogen, CH3OH is a renewable storable liquid solar fuel, not only integrating carbon capture and utilisation (CCU), but also power-to-liquid.

Keywords: Photo-catalysis; CO2 reduction; Methanol; Perovskite; Nanoparticle; Liquid solar fuel (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:195:y:2022:i:c:p:885-895

DOI: 10.1016/j.renene.2022.06.064

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