Formal quantum efficiencies for the photocatalytic reduction of CO 2 in a gas phase batch reactor

M. A.L.R.M. Cortes*, J. W.J. Hamilton, P. K. Sharma, A. Brown, M. Nolan, Kimberly A Gray, J. A. Byrne

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The photocatalytic reduction of CO 2 to fuels, or useful products, is an area of active research. In this work, nanoengineering and surface modification of titania were investigated as approaches for improving the CO 2 reduction efficiency in a fixed-bed gas phase batch photoreactor under UV–vis irradiation. Titania nanotubes were prepared by a hydrothermal method, and TiO 2 (P25) was surface modified with copper clusters. Unmodified TiO 2 (P25) was used as the bench-mark comparison. The titania nanotubes and Cu-TiO 2 materials showed higher efficiency for the photocatalytic reduction of CO 2 to yield CH 4 as compared to P25. Carbon monoxide yields were similar for all photocatalysts tested. The photocatalytic reduction of CO 2 was observed on all photocatalyst tested, with the nanotubes proving to be the most efficient for the production of CH 4 . The product yields per mass of catalyst observed in this work are similar to those reported in the literature (with similar reactor parameters) but the calculated formal quantum efficiencies for CO 2 reduction are very low (4.41 × 10 −5 to 5.95 × 10 -4 ).

Original languageEnglish (US)
Pages (from-to)75-81
Number of pages7
JournalCatalysis Today
Volume326
DOIs
StatePublished - Apr 1 2019

Fingerprint

Batch reactors
Carbon Monoxide
Quantum efficiency
Gases
Nanotubes
Titanium
Photocatalysts
Carbon monoxide
Surface treatment
Irradiation
Copper
Catalysts
titanium dioxide

Keywords

  • CO photoreduction
  • Mechanism
  • Quantum efficiency
  • Titanium dioxide

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Cortes, M. A. L. R. M., Hamilton, J. W. J., Sharma, P. K., Brown, A., Nolan, M., Gray, K. A., & Byrne, J. A. (2019). Formal quantum efficiencies for the photocatalytic reduction of CO 2 in a gas phase batch reactor Catalysis Today, 326, 75-81. https://doi.org/10.1016/j.cattod.2018.10.047
Cortes, M. A.L.R.M. ; Hamilton, J. W.J. ; Sharma, P. K. ; Brown, A. ; Nolan, M. ; Gray, Kimberly A ; Byrne, J. A. / Formal quantum efficiencies for the photocatalytic reduction of CO 2 in a gas phase batch reactor In: Catalysis Today. 2019 ; Vol. 326. pp. 75-81.
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Formal quantum efficiencies for the photocatalytic reduction of CO 2 in a gas phase batch reactor . / Cortes, M. A.L.R.M.; Hamilton, J. W.J.; Sharma, P. K.; Brown, A.; Nolan, M.; Gray, Kimberly A; Byrne, J. A.

In: Catalysis Today, Vol. 326, 01.04.2019, p. 75-81.

Research output: Contribution to journalArticle

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