Solar-Assisted CO2 Methanation via Photocatalytic Sabatier Reaction by Calcined Titanium-based Organic Framework Supported RuOx Nanoparticles
[EN] CO2 reduction by sunlight under mild reaction conditions is a research area of increasing interest expected to favor decarbonization and produce fuels and chemicals in the circular economy. We hereby report on the development of a series of titanium oxide-based solids produced by calcination of...
| Autores: | , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglês |
| OAI Identifier: | oai:riunet.upv.es:10251/211870 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/211870 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Photocatalysis Semiconductors Metal-organic framework-derived CO2 methanation Sunlight irradiation QUIMICA ORGANICA |
| Resumo: | [EN] CO2 reduction by sunlight under mild reaction conditions is a research area of increasing interest expected to favor decarbonization and produce fuels and chemicals in the circular economy. We hereby report on the development of a series of titanium oxide-based solids produced by calcination of MIL-125(Ti)-NH2 decorated with RuOx nanoparticles (1 wt %) material at temperatures from 350 to 650 degrees C and used as photocatalysts for CO2 methanation under simulated sunlight irradiation (45 mW/cm(2)) at <200 degrees C and 1.5 atm total pressure. The material synthesized at 350 degrees C produced the highest photoactivity of the series (4.73 mmol g(-1) CH4 at 22 h and an apparent quantum yield at 400, 500 and 750 nm of 0.76, 0.65 and 0.54 %, respectively), comparing favorably with the activities of other MOF-based materials reported so far. Insights into the material's photocatalytic performance and a study of the possible reaction pathways during CO2 methanation were obtained by electrochemical impedance, electron spin resonance, photoluminescence and in situ FT-IR spectroscopies together with transient photocurrent and hydrogen temperature programed desorption measurements. The study showed the possibility of using MOF-based materials as precursors to develop metal oxide photocatalysts with enhanced activities for solar-driven gaseous CO2 photomethanation. |
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