
Production of CH4 and CO on CuxO and NixOy coatings through CO2 photoreduction
Authors (5): M. A. Ávila-López, J. Z. Y. Tan, E. Luévano-Hipólito, L. M. Torres-Martínez, M. M. Maroto-Valer
Themes: Collaborations DOI: 10.1016/j.jece.2022.108199
Citations: 12
Pub type: journal-article
Pub year: 2022
Authors (5): M. A. Ávila-López, J. Z. Y. Tan, E. Luévano-Hipólito, L. M. Torres-Martínez, M. M. Maroto-Valer
Themes: Collaborations DOI: 10.1016/j.jece.2022.108199
Citations: 12
Pub type: journal-article
Pub year: 2022
Publisher: Elsevier BV
Issue: 4
License: [{"start"=>{"date-parts"=>[[2022, 8, 1]], "date-time"=>"2022-08-01T00:00:00Z", "timestamp"=>1659312000000}, "content-version"=>"tdm", "delay-in-days"=>0, "URL"=>"https://www.elsevier.com/tdm/userlicense/1.0/"}]
Publication date(s): 2022/08 (online)
Pages: 108199
Volume: 10 Issue: 4
Journal: Journal of Environmental Chemical Engineering
URL: http://dx.doi.org/10.1016/j.jece.2022.108199
CO2 capture and photocatalytic reduction to hydrocarbons is an interesting yet challenging area that requires photocatalysts with the capability to capture and photoconvert CO2 simultaneously. Furthermore, earth-abundant photocatalysts with high efficiency and product selectivity are essential for commercialization. Thus, two earth-abundant photocatalysts based on copper and nickel oxides were selected to produce solar fuels from CO2 photoreduction. The photocatalysts were immobilized on commercial glass fibers substrates by a facile one-step microwave-hydrothermal method. CuxO (x = 1, 2) and NixOy (x = 1, 2 and y = 1, 3) coatings on glass fiber were evaluated as photocatalysts in two different reactors to investigate the selectivity in a continuous reactor and a batch system. Two different light sources were employed: a heterochromatic lamp to simulate part of the solar light in the continuous reactor and a LED visible light in the batch reactor. CuO/Cu2O photocatalysts exhibited a selective production of CH4 (95 µmol g−1 h−1) and CH3OH (177 µmol g−1 h−1) from CO2 photoreduction in the continuous and batch continuous systems, respectively. The superior performance was attributed to the unique rod-shape morphology, the presence of oxygen vacancies, and efficient charge transfer in the CuO/Cu2O heterostructure with high affinity towards CO2, resulting the formation of mono- and bidentate carbonate species during the CO2 photoreduction reaction. NixOy coating with 2D cubic shape produced CO (103 µmol g−1 h−1) and HCOOH (4245 µmol g−1 h−1), associating with the low CO2 affinity and less efficient charge separation compared to CuO/Cu2O heterostructure.
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Appendix A. Supplementary material for Production of CH4 and CO on CuxO and NixOy Coatings through CO2 Photoreduction | Production of CH4 and CO on CuxO and NixOy Coatings through CO2 Photored... | 2022 |
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