“One-Pot” Solar Fuels

Ozin, Geoffrey A.

doi:10.1016/j.joule.2017.08.010

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Extensive works have been devoted to develop strategies for efficient light-to-fuel conversion for decades. The strategies involve photocatalytic H 2 O splitting, − light-driven thermochemical splitting of H 2 O or CO 2 , − photocatalytic CO 2 reduction to produce fuels, − photocatalytic steam reforming of methane (SRM), − photocatalytic dry reforming of methane (DRM), − and so on. Among the strategies, light-driven thermochemical CO 2 splitting, photocatalytic CO 2 reduction, and photocatalytic DRM are very promising, as the two major global issues could be solved at the same time.…”

Section: Introductionmentioning

confidence: 99%

Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage

et al. 2021

ACS Sustainable Chem. Eng.

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Energy shortage and global warming owing to greenhouse gas (CO2) discharge in enormous quantities are two major global strategic issues. Photocatalytic solar fuel production (e.g., CO2 reduction, H2O splitting, etc.) by utilizing inexhaustible solar energy is very appealing and promising for addressing the two issues. Low light-to-fuel efficiencies (η) and fuel production rates (r fuel) are the impassable challenges in the view of the photocatalytic principle. Therefore, it is imperative and a great challenge to develop a new strategy of significantly increasing η and r fuel. Recently, a novel strategy of photothermocatalytic dry reforming of methane (DRM, CO2 + CH4 = 2CO + 2H2, ΔH 298 = 247 kJ mol–1) has been reported. By the strategy, very high η and r fuel values have been simultaneously achieved merely using focused illumination based on nanostructured group VIII metal catalysts. The photothermocatalytic DRM abides by a mechanism of light-driven thermocatalysis. A novel photoactivation, quite different from conventional photocatalysis on semiconductor photocatalysts, is found to considerably promote light-driven thermocatalysis. In this Perspective, the light-driven thermocatalytic DRM mechanism, light-to-fuel conversion, and the photoactivation will be discussed. The major challenge for the photothermocatalytic DRM is the quick deactivation of the catalysts (especially nonprecious group VIII metal catalysts) due to thermodynamically inevitable side reactions of coke formation accompanying DRM. The strategies of kinetically inhibiting coke formation by designing nonprecious group VIII metal catalysts such as the surface modification of Ni nanoparticles by oxide clusters, loading Ni or Co nanoparticles on oxides with active oxygen, forming NiCo alloy nanoparticles, forming a CO2 molecular fence around Ni nanoparticles, and so on, will be discussed.

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Section: Introductionmentioning

confidence: 99%

Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage

et al. 2021

ACS Sustainable Chem. Eng.

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“…Zhu et al [60] brought up a thermodynamic model of ceria dense membrane for CO 2 splitting, and the energy efficiency is above 10% at 1800 K without heat recovery. Steinfeld et al [61,62] have done a lot of experimental researches about solar CO 2 splitting for CO generation by oxygen permeation membrane with 100% selectivity (e.g., La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ at 1030°C [61], CeO 2 at 1600°C [62]), and Ozin [63] said the research of Steinfeld is an elegant demonstration and an exciting breakthrough for continuous CO 2 splitting in a single step, at a single temperature, in a single reactor.…”

Section: Oxygen Permeation Membrane For H 2 O/co 2 Splittingmentioning

confidence: 99%

Solar Thermochemical Fuel Generation

Wang¹

2020

Wind Solar Hybrid Renewable Energy System

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Solar energy is one of the most abundant, clean, and widespread energy in the world, which has the potential to address the issues of environmental pollution, global warming, and energy crisis, while the intermittent distribution of solar energy in time and space limits its utilization. Among various approaches of solar energy utilization, converting solar energy into chemical fuel (e.g., hydrogen) by thermochemical approach could maintain the steady and high-efficient energy supply and can make use of the full-spectrum solar energy. The research about solar thermochemical fuel generation lasts more than 40 years, and lots of reaction system and reactors have been proposed. This chapter reviews the state-of-the-art progress of solar thermochemical fuel generation, and the characteristics of different systems have been compared and discussed, which may give systematical insight into the development and improvement of solar fuel generation by thermochemical approach in the future.

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“…Reactive metal oxide structures are key reactor elements for synthesis gas (syngas) production via high-temperature solar thermochemical redox reactions. The thermal, chemical, and structural stability of redox materials is required for reliable and cost-competitive syngas production. − Structural and chemical instabilities of the redox materials were reported in previous studies. ,− Some solutions proposed to alleviate the stability issues include oxide-supported (typically alumina, silica, zirconia) redox metal oxide structures − and metal-doped redox metal oxides such as Fe, Zr, Mn, V or Co-doped ceria (CeO 2 ) − and La, Fe, Co or Ce-doped perovskites. ,,− Although CeO 2 has been shown to be the most stable redox material that maintains its reactivity during cyclic operation, sintering at high temperatures is a persisting issue for the material. Furthermore, the quest for high oxygen exchange capacity, and thus higher potential system efficiency, prompts the development of redox materials beyond pure ceria. ,, …”

Section: Introductionmentioning

confidence: 99%

Redox Performance of Ceria–Vanadia Mixed-Phase Reticulated Porous Ceramics for Solar Thermochemical Syngas Production

et al. 2021

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Solar energy-driven thermochemical redox cycles are a promising method of synthesis gas production. Oxygen exchange materials are key chemical components directly affecting overall solar-to-fuel efficiency. In this work, we investigate the development and performance of ceria−vanadia mixed-phase reticulated porous ceramics used in methane partial oxidation coupled to carbon dioxide splitting reactions for solar production of synthesis gas. The mechanical robustness and redox capability with high oxygen exchange capacity are demonstrated over 20 consecutive thermochemical cycles. The cycle-average hydrogen and carbon monoxide production rates during the methane partial oxidation are up to 11.1 and 5.3 mL min −1 g −1 , respectively. For the carbon dioxide splitting reaction, the average CO production rate is up to 4.5 mL min −1 g −1 . Ceria−vanadia mixed-phase reticulated porous ceramics are shown to have a high degree of chemical and structural stability, which makes them promising for application at a solar reactor level. The ceria−vanadia mixed-phase material is suitable for manufacturing reticulated porous ceramics in a dual-scale porous configuration by extension of the method presented.

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“One-Pot” Solar Fuels

Cited by 11 publications

References 9 publications

Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage

Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage

Solar Thermochemical Fuel Generation

Redox Performance of Ceria–Vanadia Mixed-Phase Reticulated Porous Ceramics for Solar Thermochemical Syngas Production

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“One-Pot” Solar Fuels

Cited by 11 publications

References 9 publications

Photothermocatalytic Dry Reforming of Methane for Efficient CO2 Reduction and Solar Energy Storage

Photothermocatalytic Dry Reforming of Methane for Efficient CO2 Reduction and Solar Energy Storage

Solar Thermochemical Fuel Generation

Redox Performance of Ceria–Vanadia Mixed-Phase Reticulated Porous Ceramics for Solar Thermochemical Syngas Production

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Product

Resources

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Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage

Photothermocatalytic Dry Reforming of Methane for Efficient CO₂ Reduction and Solar Energy Storage