Methanation of carbon dioxide over Ru/Titania at room temperature: explorations for a photoassisted catalytic reaction

Melsheimer, Jörg; Guo, Weihua; Ziegler, Daniele; Wesemann, Michael; Schlögl, Robert

doi:10.1007/bf00764081

Cited by 38 publications

(22 citation statements)

References 9 publications

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“…The CO 2 conversion was believed to be due to thermal and UV light effects. However, a later report concluded that it was solely a thermal effect [78]. Comparable or slower methane formation to that reported in reference 77 was reproduced at 295 and 373 K in the dark.…”

Section: Photon Energy Conversion Of Co 2 To Fuels Using Hydrogensupporting

confidence: 46%

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Izumi

2013

Coordination Chemistry Reviews

595

278

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Contents 1. Background 2. Thermochemical conversion of CO 2 to fuels 3. Photon energy conversion of CO 2 to fuels with water 3.1. TiO 2 photocatalysts 3.2. Metal-loaded TiO 2 photocatalysts 3.3. Highly dispersed TiO 2 photocatalysts 3.4. Modified/doped TiO 2 photocatalysts 3.5. Historical low conversion rates and misunderstandings when using TiO 2-based photocatalysts 3.6. Semiconductor photocatalysts other than TiO 2 3.7. Carbon-based photocatalysts 4. Photon energy conversion of CO 2 to fuels using hydrogen 4.1. Photocatalytic conversion of CO 2 to methane or CO using hydrogen 4.2. Photocatalytic conversion of CO 2 to methanol using hydrogen

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Section: Photon Energy Conversion Of Co 2 To Fuels Using Hydrogensupporting

confidence: 46%

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Izumi

2013

Coordination Chemistry Reviews

595

278

View full text Add to dashboard Cite

show abstract

“…The spectral irradiance that is incident on the three tests is shown in Figure S7 (Supporting Information). [36] From this wavelength-dependent study, we conclude that photomethanation rates increase with increasing relative intensity of incident photons. Test 1 had the lowest 13 CH 4 peak and Test 3 had the highest 13 CH 4 mass peak.…”

Section: Resultsmentioning

confidence: 68%

“…[31][32][33][34] Traditionally, the Sabatier reaction had been thermally driven until Thampi et al reported that it can also be activated photochemically with solar simulated irradiation using Ru/RuO x loaded on TiO 2 . [36] Thereafter, several different photocatalysts have been developed for the photomethanation of CO 2 . [36] Thereafter, several different photocatalysts have been developed for the photomethanation of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Ambient Temperature CO₂ Photomethanation Catalyzed by Nanostructured RuO₂ on Silicon Photonic Crystal Support

Jelle

Ghuman

O’Brien

et al. 2018

Advanced Energy Materials

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Sunlight‐driven catalytic hydrogenation of CO2 is an important reaction that generates useful chemicals and fuels and if operated at industrial scales can decrease greenhouse gas CO2 emissions into the atmosphere. In this work, the photomethanation of CO2 over highly dispersed nanostructured RuO2 catalysts on 3D silicon photonic crystal supports, achieving impressive conversion rates as high as 4.4 mmol gcat−1 h−1 at ambient temperatures under high‐intensity solar simulated irradiation, is reported. This performance is an order of magnitude greater than photomethanation rates achieved over control samples made of nanostructured RuO2 on silicon wafers. The high absorption and unique light‐harvesting properties of the silicon photonic crystal across the entire solar spectral wavelength range coupled with its large surface area are proposed to be responsible for the high methanation rates of the RuO2 photocatalyst. A density functional theory study on the reaction of CO2 with H2 revealed that H2 splits on the surface of the RuO2 to form hydroxyl groups that participate in the overall photomethanation process.

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“…[ 17 ] Enhanced methanation rates were originally attributed to the chemical effects of electronhole pairs generated from UV-light absorption in the TiO 2 support. However, subsequent studies revealed that photoactive species adsorbed on the catalyst surface [ 18 ] as well as the increased temperature of the catalyst under light irradiation [ 19 ] played a more signifi cant role in increasing the methanation rates rather than the direct band-gap absorption of the TiO 2 support. Since this initial study, numerous catalysts have been tested for photoactivated CO 2 3 , ZnO, and MgO and found that of these materials, only ZrO 2 and MgO exhibited photoactivity for the reduction of CO 2 to CO in a H 2 atmosphere.…”

Section: Doi: 101002/advs201400001mentioning

confidence: 99%

Photomethanation of Gaseous CO₂ over Ru/Silicon Nanowire Catalysts with Visible and Near‐Infrared Photons

et al. 2014

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Gaseous CO2 is transformed photochemically and thermochemically in the presence of H2 to CH4 at millimole per hour per gram of catalyst conversion rates, using visible and near‐infrared photons. The catalyst used to drive this reaction comprises black silicon nanowire supported ruthenium. These results represent a step towards engineering broadband solar fuels tandem photothermal reactors that enable a three‐step process involving i) CO2 capture, ii) gaseous water splitting into H2, and iii) reduction of gaseous CO2 by H2.

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Methanation of carbon dioxide over Ru/Titania at room temperature: explorations for a photoassisted catalytic reaction

Cited by 38 publications

References 9 publications

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Highly Efficient Ambient Temperature CO₂ Photomethanation Catalyzed by Nanostructured RuO₂ on Silicon Photonic Crystal Support

Photomethanation of Gaseous CO₂ over Ru/Silicon Nanowire Catalysts with Visible and Near‐Infrared Photons

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Methanation of carbon dioxide over Ru/Titania at room temperature: explorations for a photoassisted catalytic reaction

Cited by 38 publications

References 9 publications

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Recent advances in the photocatalytic conversion of carbon dioxide to fuels with water and/or hydrogen using solar energy and beyond

Highly Efficient Ambient Temperature CO2 Photomethanation Catalyzed by Nanostructured RuO2 on Silicon Photonic Crystal Support

Photomethanation of Gaseous CO2 over Ru/Silicon Nanowire Catalysts with Visible and Near‐Infrared Photons

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Product

Resources

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Highly Efficient Ambient Temperature CO₂ Photomethanation Catalyzed by Nanostructured RuO₂ on Silicon Photonic Crystal Support

Photomethanation of Gaseous CO₂ over Ru/Silicon Nanowire Catalysts with Visible and Near‐Infrared Photons