Photo-thermal Catalytic CO 2 Methanation by RuO x @MIL-101(Cr) with 9.2% Apparent Quantum Yield under Visible Light Irradiation
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Solar-assisted gaseous CO 2 hydrogenation to CH 4 is a potential strategy for favoring the transition to net zero emissions. Here, we report the development of a series of efficient metal–organic frameworks with MIL-101(Cr or Fe) topology decorated with RuO x nanoparticles (ca. 0.2–2 wt %) as heterogeneous photocatalysts for the selective methanation of CO 2 by H 2 under simulated sunlight irradiation. The activity of RuO x (1 wt %)@MIL-101(Cr) is between 3 and 50 times higher than related MOF-based photocatalysts under similar reaction conditions. Among the different photocatalysts, the optimized RuO x (2 wt %)@MIL-101(Cr) photocatalyst showed 98.1% CO 2 conversion with 98.8% CH 4 selectivity reaching a production rate of 7.85 mmol g –1 h –1 with 720 mW cm –2 at 200 °C. Further, this photocatalyst exhibited a record apparent quantum yield of 9.2% at 600 nm and 200 °C after subtracting thermal activity contribution compared to any previous MOF- or other heterogeneous-based photocatalyst reported so far. The photocatalyst retained its activity and integrity upon reuse for about 110 h. Transient photocurrent, electrochemical impedance, photoluminescence, and laser flash photolysis spectroscopies together with additional photocatalytic experiments suggest the occurrance of dual photochemical and photothermal reaction pathways. The photocatalytic CO 2 methanation reaction mechanism was further investigated using operando Fourier transform infrared spectroscopy.
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Generalitat Valenciana, Ministerio de Ciencia e Innovación, Région Normandie, Horizon 2020 Framework Programme, Universitat Politècnica de València, European Regional Development Fund, Agencia Estatal de Investigación, Ministerio de Universidades, NextGenerationEU
Awards: G1045630214, G1131933677, G120905174, G121809054, G1272927172, G139723338, G1422035950, G1482201912, G1530851820, G1622782223, G1697917336, G18271642, G1855990336, G2062862500, G2231612638, G2262748287, G2660406951, G280048558, G2815556424, G3480869486, G348919436, G357246561, G363809202, G3681454997, G4042783231, G4085913623, G410487079, G425668148, G434337789, G451917667, G4994255339, G5303796338, G531036588, G5415954911, G5421974903, G5747830521, G5805502524, G5967599077, G6033112984, G6122765157, G6718922900, G7084143925, G7249876910, G726759913, G7655680284, G8460294086, G8546142835, G8945747838
OpenAlex ID: W4413606352