Hybrid Photo- and Thermal Catalyst System for Continuous CO2 Reduction

  • Heterogeneous thermal catalytic processes are vital for industrial production of fuels, fertilizers, and other chemicals necessary for sustaining human life. However, these processes are highly energy-intensive, requiring a vast consumption of fossil fuels. An emerging class of heterogeneous catalysts that are thermally driven but also exhibit a photochemically enhanced rate can potentially reduce process energy intensity by partially substituting conventional heat (where fossil fuels are needed) with solar energy. Such catalyst systems have yet to be practically utilized. Here, we demonstrate a compact electrically heated photo- and thermal annular reactor module to reduce CO2 to CO, via the reverse water gas shift reaction. A first-principles-based design approach was taken in developing a SiO2 on an Al photo- and thermal catalyst system for the model photo- and thermal indium oxide hydroxide (In2O3–x(OH)y) catalysts. A 5-fold light enhancement in the CO production rate and over 70 h of stable CO production were achieved. ThisHeterogeneous thermal catalytic processes are vital for industrial production of fuels, fertilizers, and other chemicals necessary for sustaining human life. However, these processes are highly energy-intensive, requiring a vast consumption of fossil fuels. An emerging class of heterogeneous catalysts that are thermally driven but also exhibit a photochemically enhanced rate can potentially reduce process energy intensity by partially substituting conventional heat (where fossil fuels are needed) with solar energy. Such catalyst systems have yet to be practically utilized. Here, we demonstrate a compact electrically heated photo- and thermal annular reactor module to reduce CO2 to CO, via the reverse water gas shift reaction. A first-principles-based design approach was taken in developing a SiO2 on an Al photo- and thermal catalyst system for the model photo- and thermal indium oxide hydroxide (In2O3–x(OH)y) catalysts. A 5-fold light enhancement in the CO production rate and over 70 h of stable CO production were achieved. This represents the highest light enhancement effect reported for this model photocatalyst to date. The reactor presented herein allows continuous operation and a significant reduction of 31% in heater power consumption when provided with an additional 2 suns of irradiation, demonstrating the strong photo- and thermal-harvesting performances of the catalyst system developed in this work.show moreshow less

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Author:Abhinav Mohan, Ulrich UlmerORCiD, Lourdes HurtadoORCiD, Joel LohORCiD, Young Feng Li, Athanasios A. Tountas, Carola Krevert, Chakyu Chan, Yilei Liang, Peter Brodersen, Mohini M. SainORCiD, Geoffrey A. OzinORCiD
DOI:https://doi.org/10.1021/acsami.0c06232
ISSN:1944-8244
Parent Title (English):ACS Applied Materials & Interfaces
Publisher:American Chemical Society (ACS)
Document Type:Article
Language:English
Reviewed:Begutachtet/Reviewed
Release Date:2024/08/07
Volume:12
Issue:30
Pagenumber:8
First Page:33613
Last Page:33620
institutes:Fakultät Verfahrenstechnik
Institut für Angewandte Wasserstoffforschung, Elektro- und Thermochemische Energiesysteme (H2Ohm)
Research Themes:Energie & Ressourcen
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