Unprecedented photocatalytic conversion of gaseous and liquid CO2 on graphene-impregnated Pt/Cu-TiO2: The critical role of Cu dopant

Samar Al Jitan; Yuting Li; Daniel Bahamon; Gregor Žerjav; Vikram Sagar Tatiparthi; Cyril Aubry; Mutasem Sinnokrot; Zineb Matouk; Nitul Rajput; Monserrat Gutierrez; Khalid Al-Ali; Raed Hashaikeh; Albin Pintar; Lourdes F. Vega; Giovanni Palmisano

doi:10.1016/j.jece.2023.109485

Unprecedented photocatalytic conversion of gaseous and liquid CO₂ on graphene-impregnated Pt/Cu-TiO₂: The critical role of Cu dopant

Samar Al Jitan, Yuting Li, Daniel Bahamon, Gregor Žerjav, Vikram Sagar Tatiparthi, Cyril Aubry, Mutasem Sinnokrot, Zineb Matouk, Nitul Rajput, Monserrat Gutierrez, Khalid Al-Ali, Raed Hashaikeh, Albin Pintar, Lourdes F. Vega, Giovanni Palmisano

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

In the context of sustainable development, the photocatalytic conversion of CO₂ represents an appealing approach to mitigate climate change while also helping the economy. In this regard, numerous catalysts have been tested for the photoreduction of gaseous CO₂; however, the photoconversion of pure liquid CO₂ has rarely been investigated. This work provides a novel approach for the application of photocatalytic CO₂ conversion through the utilization of CO₂ in its pure liquid state. Experimental results show much higher CO yields during the photoreduction of liquid CO₂ when compared to gaseous CO₂. This is ascribed to stronger interactions between CO₂ and TiO₂ when considering the solvation effect, as confirmed by DFT calculations. Results also show the positive effect of doping TiO₂ with copper. The CO yields obtained with liquid CO₂, which range from ca. 92–206 mmol·g_cat⁻¹, are the highest ever reported.

Original language	English (US)
Article number	109485
Journal	Journal of Environmental Chemical Engineering
Volume	11
Issue number	2
DOIs	https://doi.org/10.1016/j.jece.2023.109485
State	Published - Apr 2023

Keywords

CO photoreduction
CO utilization
DFT
Gaseous CO
Liquid CO

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Waste Management and Disposal
Pollution
Process Chemistry and Technology

Access to Document

10.1016/j.jece.2023.109485

Cite this

Al Jitan, S., Li, Y., Bahamon, D., Žerjav, G., Tatiparthi, V. S., Aubry, C., Sinnokrot, M., Matouk, Z., Rajput, N., Gutierrez, M., Al-Ali, K., Hashaikeh, R., Pintar, A., Vega, L. F., & Palmisano, G. (2023). Unprecedented photocatalytic conversion of gaseous and liquid CO₂ on graphene-impregnated Pt/Cu-TiO₂: The critical role of Cu dopant. Journal of Environmental Chemical Engineering, 11(2), Article 109485. https://doi.org/10.1016/j.jece.2023.109485

Al Jitan, S, Li, Y, Bahamon, D, Žerjav, G, Tatiparthi, VS, Aubry, C, Sinnokrot, M, Matouk, Z, Rajput, N, Gutierrez, M, Al-Ali, K, Hashaikeh, R, Pintar, A, Vega, LF & Palmisano, G 2023, 'Unprecedented photocatalytic conversion of gaseous and liquid CO₂ on graphene-impregnated Pt/Cu-TiO₂: The critical role of Cu dopant', Journal of Environmental Chemical Engineering, vol. 11, no. 2, 109485. https://doi.org/10.1016/j.jece.2023.109485

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abstract = "In the context of sustainable development, the photocatalytic conversion of CO2 represents an appealing approach to mitigate climate change while also helping the economy. In this regard, numerous catalysts have been tested for the photoreduction of gaseous CO2; however, the photoconversion of pure liquid CO2 has rarely been investigated. This work provides a novel approach for the application of photocatalytic CO2 conversion through the utilization of CO2 in its pure liquid state. Experimental results show much higher CO yields during the photoreduction of liquid CO2 when compared to gaseous CO2. This is ascribed to stronger interactions between CO2 and TiO2 when considering the solvation effect, as confirmed by DFT calculations. Results also show the positive effect of doping TiO2 with copper. The CO yields obtained with liquid CO2, which range from ca. 92–206 mmol·gcat−1, are the highest ever reported.",

keywords = "CO photoreduction, CO utilization, DFT, Gaseous CO, Liquid CO",

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AU - Bahamon, Daniel

AU - Žerjav, Gregor

AU - Tatiparthi, Vikram Sagar

AU - Aubry, Cyril

AU - Sinnokrot, Mutasem

AU - Matouk, Zineb

AU - Rajput, Nitul

AU - Gutierrez, Monserrat

AU - Al-Ali, Khalid

AU - Hashaikeh, Raed

AU - Pintar, Albin

AU - Vega, Lourdes F.

AU - Palmisano, Giovanni

PY - 2023/4

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AB - In the context of sustainable development, the photocatalytic conversion of CO2 represents an appealing approach to mitigate climate change while also helping the economy. In this regard, numerous catalysts have been tested for the photoreduction of gaseous CO2; however, the photoconversion of pure liquid CO2 has rarely been investigated. This work provides a novel approach for the application of photocatalytic CO2 conversion through the utilization of CO2 in its pure liquid state. Experimental results show much higher CO yields during the photoreduction of liquid CO2 when compared to gaseous CO2. This is ascribed to stronger interactions between CO2 and TiO2 when considering the solvation effect, as confirmed by DFT calculations. Results also show the positive effect of doping TiO2 with copper. The CO yields obtained with liquid CO2, which range from ca. 92–206 mmol·gcat−1, are the highest ever reported.

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KW - Liquid CO

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