A novel strategy for dramatically improving catalytic performance for light-driven thermocatalytic CO2 reduction with CH4 on Ru/MgO: the CO2 molecular fencing effect promoted by photoactivation

Cao, Huamin; Li, Yuanzhi; Hu, Qianqian; Wu, Jichun; Ji, Lei

doi:10.1039/d3ta04267g

Cited by 7 publications

(1 citation statement)

References 59 publications

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“…Recently, a highly efficient photothermocatalytic approach that combines the benefits of photocatalytic (light-to-fuel efficiency) and thermocatalytic (high catalytic activity) has been widely reported. 58 This route has high photothermocatalytic activity for reducing CO 2 using CH 4 , 31–42 H 2 O, 43–46 H 2 , 47–51 and so on.…”

Section: Introductionmentioning

confidence: 99%

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Hu,

Wu,

et al. 2024

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Hu,

Wu,

et al. 2024

J. Mater. Chem. A

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Insights into Photothermocatalytic Dry Reforming of Methane on Ru/La‐Al₂O₃ using Carbonate Species and Reactive Oxygen Species to Enhance the Fuel Production Rates and Completely Prevent Coking

Cao,

Li,

et al. 2024

Adv Funct Materials

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Photothermocatalytic dry reforming of methane (DRM) offers a promising strategy for converting solar energy into fuel. However, the high light intensity required for high fuel production rates and thermodynamically more favorable coking side reactions limit this strategy. Herein, a nanocomposite of La‐doped Al2O3 supporting Ru nanoparticles (NPs) (Ru/La‐Al2O3) is synthesized. At relatively low light intensity (80.2 kW m−2), Ru/La‐Al2O3 obtains high production rates of CO and H2 per gram of Ru (rRu, CO and rRu, H2, 8410.19 and 7181.94 mmol gRu−1 min−1) with light‐to‐fuel efficiency (η, 26.6%), and completely prohibits coking. In striking contrast, the reference catalyst without La doping (Ru/Al2O3) exhibits lower rRu, CO, rRu, H2, η and produces large amounts of coke. The improved photothermocatalytic performance stems from the fact that reactive oxygen species and carbonate species are involved in the oxidation of carbon species (rate‐determining steps of DRM) through two different reaction pathways, which significantly increases catalytic activity and prevents the carbon species from polymerizing into coke. Additionally, light not only enhances the DRM on Ru NPs and the oxidation reaction between carbonate species and carbon species but also promotes the dissociation of CH4 and desorption of H2, which improves the catalytic activity and product selectivity of Ru/La‐Al2O3.

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The Pivotal Roles of Light and Ca‐Doping in Photothermocatalytic CO₂ Reduction by Methane on Nanocomposites of Nickel Nanoparticles Loaded on Ca‐Doped Al₂O₃

Yu,

Cao,

et al. 2024

Solar RRL

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CO2 and CH4 are greenhouse gases that can be converted into H2 and CO through light‐driven photothermocatalytic CO2 reduction with methane (CRM), which is a process of solar energy collection and storage. However, conventional catalysts require high light intensities (≥192.0 kW m−2) to obtain high fuel reaction rates and solar‐to‐fuel efficiency (η), and deactivate easily to coking at high temperature. Herein, a nanomaterial of Ni nanoparticles loaded on Ca‐doped Al2O3 (Ni/Ca–Al2O3) is synthesized. Ca doping improves the CO2 adsorption capacity of Ni/Ca–Al2O3. Under focused ultraviolet–visible–infrared illumination at low light intensity (80.8 kW m−2), Ni/Ca–Al2O3 obtains high production rates of H2 (, 76.85 mmol min−1 g−1) and CO (rCO, 90.90 mmol min−1 g−1), which are 1.9 and 1.3 times of those in the dark respectively, and exhibits a large η (30.3%) and good stability. The coking rate of Ni/Ca–Al2O3 is reduced by a factor of 25.8 compared to the reference catalyst with Ni nanoparticles loaded on Al2O3. The improvement of catalytic activity and anticoking properties stems from the photoactivation, which not only accelerates the CRM on Ni nanoparticles, but also enhances the oxidation of carbon species (produced on Ni nanoparticles) through strong adsorption of CO2 on Ca–Al2O3 at Ni/Ca–Al2O3 interface.

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A novel strategy for dramatically improving catalytic performance for light-driven thermocatalytic CO₂ reduction with CH₄ on Ru/MgO: the CO₂ molecular fencing effect promoted by photoactivation

Cited by 7 publications

References 59 publications

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Insights into Photothermocatalytic Dry Reforming of Methane on Ru/La‐Al₂O₃ using Carbonate Species and Reactive Oxygen Species to Enhance the Fuel Production Rates and Completely Prevent Coking

The Pivotal Roles of Light and Ca‐Doping in Photothermocatalytic CO₂ Reduction by Methane on Nanocomposites of Nickel Nanoparticles Loaded on Ca‐Doped Al₂O₃

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A novel strategy for dramatically improving catalytic performance for light-driven thermocatalytic CO2 reduction with CH4 on Ru/MgO: the CO2 molecular fencing effect promoted by photoactivation

Cited by 7 publications

References 59 publications

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO2–Al1Mg3O4.5

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO2–Al1Mg3O4.5

Insights into Photothermocatalytic Dry Reforming of Methane on Ru/La‐Al2O3 using Carbonate Species and Reactive Oxygen Species to Enhance the Fuel Production Rates and Completely Prevent Coking

The Pivotal Roles of Light and Ca‐Doping in Photothermocatalytic CO2 Reduction by Methane on Nanocomposites of Nickel Nanoparticles Loaded on Ca‐Doped Al2O3

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A novel strategy for dramatically improving catalytic performance for light-driven thermocatalytic CO₂ reduction with CH₄ on Ru/MgO: the CO₂ molecular fencing effect promoted by photoactivation

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Key role of light in highly efficient photothermocatalytic steam cellulose reforming on Co/CeO₂–Al₁Mg₃O_4.5

Insights into Photothermocatalytic Dry Reforming of Methane on Ru/La‐Al₂O₃ using Carbonate Species and Reactive Oxygen Species to Enhance the Fuel Production Rates and Completely Prevent Coking

The Pivotal Roles of Light and Ca‐Doping in Photothermocatalytic CO₂ Reduction by Methane on Nanocomposites of Nickel Nanoparticles Loaded on Ca‐Doped Al₂O₃