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

Izumi, Yasuo

doi:10.1016/j.ccr.2012.04.018

Cited by 598 publications

(292 citation statements)

References 97 publications

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“…For comparisons, this latter value is ∼20 μmol H 2(equiv) g −1 ·h −1 and is within the typical range of the 0.2-100-μmol product·g −1 ·h −1 (50,51), reported for CO 2 /H 2 O semiconductor photocatalysis, although claims as high as 2,000 μmol ethanol g −1 ·h −1 exist (52). When examined with respect to the incident photon flux (λ ≤ 400 nm), an incident photon quantum yield (IPQY) of 0.02-0.05% is obtained on a per electron stored basis.…”

Section: See Retraction Published January 8 2018mentioning

confidence: 99%

RETRACTED: Solar photothermochemical alkane reverse combustion

Chanmanee

Islam

Dennis

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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A one-step, gas-phase photothermocatalytic process for the synthesis of hydrocarbons, including liquid alkanes, aromatics, and oxygenates, with carbon numbers (Cn) up to C13, from CO2 and water is demonstrated in a flow photoreactor operating at elevated temperatures (180–200 °C) and pressures (1–6 bar) using a 5% cobalt on TiO2 catalyst and under UV irradiation. A parametric study of temperature, pressure, and partial pressure ratio revealed that temperatures in excess of 160 °C are needed to obtain the higher Cn products in quantity and that the product distribution shifts toward higher Cn products with increasing pressure. In the best run so far, over 13% by mass of the products were C5+ hydrocarbons and some of these, i.e., octane, are drop-in replacements for existing liquid hydrocarbons fuels. Dioxygen was detected in yields ranging between 64% and 150%. In principle, this tandem photochemical–thermochemical process, fitted with a photocatalyst better matched to the solar spectrum, could provide a cheap and direct method to produce liquid hydrocarbons from CO2 and water via a solar process which uses concentrated sunlight for both photochemical excitation to generate high-energy intermediates and heat to drive important thermochemical carbon-chain-forming reactions.

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Section: See Retraction Published January 8 2018mentioning

confidence: 99%

RETRACTED: Solar photothermochemical alkane reverse combustion

Chanmanee

Islam

Dennis

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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“…In fact, besides in organic synthesis [79,80], heterogeneous photocatalysis may find extensive application [23,81] not only in the field of environmental chemistry and pollution control, e.g., in the abatement of both aqueous and gas phase pollutants, but also in the conversion of solar into chemical energy, by thermodynamically up-hill reactions producing fuels, such as hydrogen production from water [82,83] and CO 2 photoreduction yielding methane and methanol [84].…”

Section: Specific Properties and Applications Of {001} Facet-dominatementioning

confidence: 99%

Specific Facets-Dominated Anatase TiO2: Fluorine-Mediated Synthesis and Photoactivity

2013

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Semiconductors crystal facet engineering has become an important strategy for properly tuning and optimizing both the physicochemical properties and the reactivity of photocatalysts. In this review, a concise survey of recent results obtained in the field of specific surface-oriented anatase TiO 2 crystals preparation is presented. The attention is mainly focused on the fluorine-mediated hydrothermal and/or solvothermal processes employed for the synthesis and the assembly of anatase micro/nanostructures with dominant {001} facets. Their peculiar photocatalytic properties and potential applications are also presented, with a particular focus on photocatalysis-based environmental clean up and solar energy conversion applications. Finally, the most promising results obtained in the engineering of TiO 2 anatase crystal facets obtained by employing alternative, possibly more environmentally friendly methods are critically compared.

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“…The properties used in the transport Equations (1) and (2) are determined by the presence of the component phases in each control volume. In this case, where a two-phase system exists, the density in each cell is given by:…”

Section: Simulations and Governing Equationsmentioning

confidence: 99%

“…Artificial photosynthesis has been used in attempts to mimic the natural water splitting process and to use of the sunlight as an energy source to produce molecules that can be used as feedstock and for energy storage [1,2]. Therefore, efforts to develop renewable, carbon-neutral fuel sources have led to a new research and development focus on sunlight-driven water-splitting systems [3].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and Oxygen Bubble Characterization of Catalytic Cells Used in Artificial Photosynthesis by Means of CFD

Torras

Lorente

Hernández

et al. 2017

Fluids

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Miniaturized cells can be used in photo-electrochemistry to perform water splitting. The geometry, process variables and removal of oxygen bubbles in these cells need to be optimized. Bubbles tend to remain attached to the catalytic surface, thus blocking the reaction, and they therefore need to be dragged out of the cell. Computational Fluid Dynamics simulations have been carried out to assess the design of miniaturized cells and their results have been compared with experimental results. It has been found that low liquid inlet velocities (~0.1 m/s) favor the homogeneous distribution of the flow. Moderate velocities (0.5-1 m/s) favor preferred paths. High velocities (~2 m/s) lead to turbulent behavior of the flow, but avoid bubble coalescence and help to drag the bubbles. Gravity has a limited effect at this velocity. Finally, channeled cells have also been analyzed and they allow a good flow distribution, but part of the catalytic area could be lost. The here presented results can be used as guidelines for the optimum design of photocatalytic cells for the water splitting reaction for the production of solar fuels, such as H 2 or other CO 2 reduction products (i.e., CO, CH 4 , among others).

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

Cited by 598 publications

References 97 publications

RETRACTED: Solar photothermochemical alkane reverse combustion

RETRACTED: Solar photothermochemical alkane reverse combustion

Specific Facets-Dominated Anatase TiO2: Fluorine-Mediated Synthesis and Photoactivity

Hydrodynamics and Oxygen Bubble Characterization of Catalytic Cells Used in Artificial Photosynthesis by Means of CFD

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