Photocatalytic CO2 reduction

Nature Reviews Methods Primers, Journal Year: 2023, Volume and Issue: 3(1)

Published: Aug. 10, 2023

Language: Английский

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Role of oxygen vacancy in metal oxides for photocatalytic CO2 reduction

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 321, P. 122079 - 122079

Published: Oct. 17, 2022

Language: Английский

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Ingenious Artificial Leaf Based on Covalent Organic Framework Membranes for Boosting CO₂ Photoreduction

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(17), P. 9520 - 9529

Published: April 19, 2023

Covalent organic frameworks (COFs) hold the potential in converting CO2 with water into value-added fuels and O2 to save deteriorating ecological environment. However, reaching high yield selectivity is a grand challenge under metal-, photosensitizer-, or sacrificial reagent-free conditions. Here, inspired by microstructures of natural leaves, we designed triazine-based COF membranes integration steady light-harvesting sites, efficient catalytic center, fast charge/mass transfer configuration fabricate novel artificial leaf for first time. Significantly, record CO 1240 μmol g–1 4 h reaction, approximately 100% selectivity, long lifespan (at least 16 cycles) were achieved gas–solid conditions without using any metal, photosensitizer, reagent. Unlike existing knowledge, chemical structural unit triazine-imide-triazine unique physical form membrane are predominant such remarkable photocatalysis. This work opens new pathway simulating photosynthesis leaves may motivate relevant research future.

Language: Английский

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Tunable Interfacial Charge Transfer in a 2D–2D Composite for Efficient Visible‐Light‐Driven CO₂ Conversion

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(26)

Published: March 25, 2023

Photocatalytic CO2 conversion for hydrocarbon fuel production has been known as one of the most promising strategies achieving carbon neutrality. Yet, its efficiency remains unsatisfactory mainly due to severe charge-transfer resistance and slow charge kinetics. Herein, a tunable interfacial transfer on an oxygen-vacancies-modified bismuth molybdate nanoflower assembled by 2D nanosheets (BMOVs) bismuthene composite (Bi/BMOVs) is demonstrated photocatalytic conversion. Specifically, meticulous design Ohmic contact formed between BMOVs can allow modulation resistance. According density functional theory (DFT) simulations, it ascertained that such exceptional kinetics attributed built-in electric field (IEF) contact. As such, reduction performance optimized Bi/BMOVs (CO CH4 productions rate 169.93 4.65 µmol g-1 h-1 , respectively) ca. 10 times higher than pristine BMO rates 16.06 0.51 respectively). The reported in this work shed some important light highly efficient photocatalysts both energy environmental applications.

Language: Английский

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MOFs-based S-scheme heterojunction photocatalysts

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 504, P. 215674 - 215674

Published: Jan. 23, 2024

Language: Английский

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Coordinating the Edge Defects of Bismuth with Sulfur for Enhanced CO₂ Electroreduction to Formate

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)

Published: April 20, 2023

Bismuth-based materials have been recognized as promising catalysts for the electrocatalytic CO2 reduction reaction (ECO2 RR). However, they show poor selectivity due to competing hydrogen evolution (HER). In this study, we developed an edge defect modulation strategy Bi by coordinating defects of bismuth (Bi) with sulfur, promote ECO2 RR and inhibit HER. The prepared demonstrate excellent product selectivity, a high HCOO- Faraday efficiency ≈95 % partial current ≈250 mA cm-2 under alkaline electrolytes. Density function theory calculations reveal that sulfur tends bind defects, reducing coordination-unsaturated sites (*H adsorption sites), regulating charge states neighboring improve *OCHO adsorption. This work deepens our understanding mechanism on bismuth-based catalysts, guiding design advanced catalysts.

Language: Английский

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Photochromic single atom Ag/TiO₂ catalysts for selective CO₂ reduction to CH₄

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 17(2), P. 518 - 530

Published: Dec. 7, 2023

A new all-in-one design concept of constructing photochromic single atom photocatalysts is proposed to achieve both high activity and selectivity photocatalytic CO 2 -to-CH 4 conversion.

Language: Английский

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Highly Selective Photoconversion of CO₂ to CH₄ over SnO₂/Cs₃Bi₂Br₉ Heterojunctions Assisted by S-Scheme Charge Separation

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(19), P. 12623 - 12633

Published: Sept. 13, 2023

Exploring photocatalysts to promote the conversion of CO2 valuable chemical fuels is a highly promising approach for mitigating energy scarcity and environmental pollution. Lead-free perovskite Cs3Bi2Br9 quantum dots (QDs) have attracted considerable attention in photoreduction due robust reduction capability controllable product selectivity. Nevertheless, their potential has been impeded by rapid recombination charge carriers, leading unsatisfactory photocatalytic efficiency. Here, unique SnO2/Cs3Bi2Br9 S-scheme heterojunctions are constructed electrostatically self-assembling SnO2 nanofibers with QDs enhance performance. Density functional theory calculations, along experimental studies, reveal that electrons transfer from SnO2, creating directed interfacial electric field bending bands at interfaces. This facilitates transport photoelectrons Cs3Bi2Br9, forming enabling effective separation powerful photoexcited electron/hole pairs. Additionally, profiting enhanced light absorption contributed narrow-bandgap lower barrier CH4 production over surface, heterostructures unveil superior activities high selectivity 70%, without assistance any molecular catalyst or scavenger.

Language: Английский

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Dual-Defective Two-Dimensional/Two-Dimensional Z-Scheme Heterojunctions for CO₂ Reduction

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(11), P. 7221 - 7229

Published: May 15, 2023

The target of photocatalytic CO2 reduction is to achieve high selectivity, efficiency, and stability for a single chemical/fuel production. construction conventional Z-scheme heterojunctions beneficial improve the interfacial charge separation redox capacities. However, random dimensions junction component(s) undermine charge-to-surface transport catalytic reactions, limited chemical structures catalysts restrict surface activity/selectivity tailoring. In this work, we successfully overcome these issues by stacking/constructing an ultrathin dual-defective two-dimensional (2D)/2D heterojunction with growing functional anionic vacancies onto both reductive oxidative components Z-scheme. O-vacancy-rich BiOCl/N-vacancy-rich g-C3N4-based 2D exhibits excellent photoactivity in reduction. rate photoreduction CO around 45.33 μmol g–1 h–1, which 11.7- 12.2-fold those untreated bulk g-C3N4 pristine BiOCl, respectively. Among them, N-vacancy-rich active selective ability, accompanied oxidation reactions from BiOCl. Such defective Z-schemes not only retain their original features, i.e., enhanced capacities, but also extend lower energy photon absorption ameliorate two components. Besides, density theory calculations unveiled thermodynamically favored CO2-to-CO path barrier's stepwise at COOH-to-CO rate-limiting step component further This work provides effective adaptable dual-defect engineering on 2D/2D enhance photoreduction.

Language: Английский

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Hybrid Semiconductor Photocatalyst Nanomaterials for Energy and Environmental Applications: Fundamentals, Designing, and Prospects

Advanced Sustainable Systems, Journal Year: 2023, Volume and Issue: 7(8)

Published: June 27, 2023

Abstract The degradation of fossil fuel and worse environmental conditions leads to the emergence hybrid semiconductor (SC) nanomaterials as photocatalysts. Hybrid SCs have interesting physical, mechanical, optical, chemical, electronic characteristics. Due these properties’ absorption light transfer charge takes place frequently hence act multifunctional surface. These materials should be attributed their optical electrical properties surfaces in energy production, generation, remediation, sensing, etc. When combine with noble, non‐noble metal, metal oxide, some carbon‐based materials, they explore wide applications various fields. Photocatalysis is an effective sustainable technology reduce or fix concerns corrosion problems. By going through extensive literature review, few topics are focused on designing working mechanisms materials. In this way, present review article explains properties, surface‐interface engineering, design, (energy environmental) nanomaterials, emphasizing photocatalytic nature. Additionally, appealing directions, scientific challenges, reasons behind poor stability SC photocatalyst for discussed. Finally, concluding remarks current challenges future prospects domain highlighted.

Language: Английский

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