| Title: | Light-Assisted Catalysis and the Dynamic Nature of Surface Species in the Reverse Water Gas Shift Reaction over Cu/γ-Al2O3 |
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| Authors: | ID Lorber, Kristijan, UNG, KI (Author)
ID Arčon, Iztok, UNG (Author)
ID Huš, Matej, KI (Author)
ID Zavašnik, Janez, IJS (Author)
ID Sancho-Parramon, Jordi, Ruđer Bošković Institute (Author)
ID Prašnikar, Anže, KI (Author)
ID Likozar, Blaž, KI (Author)
ID Novak Tušar, Nataša, UNG, KI (Author)
ID Djinović, Petar, UNG, KI (Author) |
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| Files: |  Reprint_lorber-et-al-2024-light-assisted-catalysis_Cu_Al2O3.pdf (5,73 MB)
MD5: 787EF736957BE03A0F7A460F888E2286
Supporting_info__lorber-et-al-2024-light-assisted-catalysis_Cu_Al2O3.pdf (1,43 MB)
MD5: 7D6E530747EDAB28E3EE661B8F721E96
 https://pubs.acs.org/doi/10.1021/acsami.4c15849?goto=supporting-info&ref=pdf
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | The reverse water gas shift (RWGS) reaction converts CO2 and H2 into CO and water. We investigated Cu/γ-Al2O3 catalysts in both thermally driven and light-assisted RWGS reactions using visible light. When driven by combined visible light and thermal energy, the CO2 conversion rates were lower than in the dark. Light-assisted reactions showed an increase in the apparent activation energy from 68 to 87 kJ/mol, indicating that light disrupts the energetically favorable pathway active in the dark. A linear correlation between irradiance and decreasing reaction rate suggests a photon-driven phenomenon. In situ diffuse reflectance infrared Fourier transform spectroscopy and TD-DFT analyses revealed that catalyst illumination causes significant, partly irreversible surface dehydroxylation, highlighting the importance of OH groups in the most favorable RWGS pathway. This study offers a novel approach to manipulate surface species and control activity in the RWGS reaction. |
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| Keywords: | light-assisted catalysis, reaction mechanism, in situ spectroscopy, hydroxyl, copper, RWGS |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 11.12.2024 |
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| Number of pages: | 67788-67790 |
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| Numbering: | Vol. 16, iss. 49 |
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| PID: | 20.500.12556/RUNG-9618  |
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| COBISS.SI-ID: | 218386947 |
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| UDC: | 544.3/.4 |
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| ISSN on article: | 1944-8252 |
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| DOI: | 10.1021/acsami.4c15849 |
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| NUK URN: | URN:SI:UNG:REP:8HXLXXNT |
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| Publication date in RUNG: | 07.01.2025 |
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| Views: | 264 |
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| Downloads: | 5 |
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