Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

Chemical Reviews, Journal Year: 2019, Volume and Issue: 119(6), P. 3962 - 4179

Published: Feb. 14, 2019

Photoreduction of CO2 into sustainable and green solar fuels is generally believed to be an appealing solution simultaneously overcome both environmental problems energy crisis. The low selectivity challenging multi-electron photoreduction reactions makes it one the holy grails in heterogeneous photocatalysis. This Review highlights important roles cocatalysts selective photocatalytic reduction using semiconductor catalysts. A special emphasis this review placed on key role, design considerations modification strategies for photoreduction. Various cocatalysts, such as biomimetic, metal-based, metal-free, multifunctional ones, their are summarized discussed, along with recent advances area. provides useful information highly photo(electro)reduction electroreduction complements existing reviews various photocatalysts.

Language: Английский

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Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Sept. 14, 2020

Abstract Exploring photocatalysts to promote CO 2 photoreduction into solar fuels is of great significance. We develop TiO /perovskite (CsPbBr 3 ) S-scheme heterojunctions synthesized by a facile electrostatic-driven self-assembling approach. Density functional theory calculation combined with experimental studies proves the electron transfer from CsPbBr quantum dots (QDs) , resulting in construction internal electric field (IEF) directing upon hybridization. The IEF drives photoexcited electrons light irradiation as revealed in-situ X-ray photoelectron spectroscopy analysis, suggesting formation an heterojunction /CsPbBr nanohybrids which greatly promotes separation electron-hole pairs foster efficient photoreduction. hybrid nanofibers unveil higher -reduction rate (9.02 μmol g –1 h comparing pristine (4.68 ). Isotope ( 13 tracer results confirm that reduction products originate source.

Language: Английский

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State of the Art and Prospects for Halide Perovskite Nanocrystals

ACS Nano, Journal Year: 2021, Volume and Issue: 15(7), P. 10775 - 10981

Published: June 17, 2021

Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been significant progress shape-controlled synthesis perovskite nanocrystals understanding applications. this comprehensive review, having expertise fields (chemistry, physics, device engineering) joined together provide state art overview future prospects nanocrystal research.

Language: Английский

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Encapsulating Perovskite Quantum Dots in Iron‐Based Metal–Organic Frameworks (MOFs) for Efficient Photocatalytic CO₂ Reduction

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 58(28), P. 9491 - 9495

Published: May 8, 2019

Improving the stability of lead halide perovskite quantum dots (QDs) in a system containing water is key for their practical application artificial photosynthesis. Herein, we encapsulate low-cost CH3 NH3 PbI3 (MAPbI3 ) QDs pores earth-abundant Fe-porphyrin based metal organic framework (MOF) PCN-221(Fex by sequential deposition route, to construct series composite photocatalysts MAPbI3 @PCN-221(Fex (x=0-1). Protected MOF exhibit much improved reaction systems water. The close contact Fe catalytic site MOF, allows photogenerated electrons transfer rapidly sites enhance photocatalytic activity CO2 reduction. Using as an electron source, @PCN-221(Fe0.2 exhibits record-high total yield 1559 μmol g-1 reduction CO (34 %) and CH4 (66 %), 38 times higher than that PCN-221(Fe0.2 absence QDs.

Language: Английский

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Core@Shell CsPbBr₃@Zeolitic Imidazolate Framework Nanocomposite for Efficient Photocatalytic CO₂ Reduction

ACS Energy Letters, Journal Year: 2018, Volume and Issue: 3(11), P. 2656 - 2662

Published: Oct. 4, 2018

The proper energy band structure and excellent visible-light responses enable halide perovskites as potential photocatalysts for CO2 reduction, but the conversion efficiency is still low due to serious radiative recombination, capturing ability, poor stability. Here we illustrate design synthesis of a perovskite@metal–organic framework (MOF) composite photocatalyst with enhanced reduction activity. A facile in situ synthetic procedure employed directly grow zinc/cobalt-based zeolitic imidazolate (ZIF) coating on surface CsPbBr3 quantum dots. CsPbBr3@ZIF shows largely improved moisture stability, charge separation efficiency. Moreover, catalytic active Co centers ZIF-67 can further accelerate process activate adsorbed molecules, which leads activity gaseous reduction. This work would provide new insight designing perovskite/MOF-based catalysts.

Language: Английский

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Nickel Metal–Organic Framework Monolayers for Photoreduction of Diluted CO₂: Metal‐Node‐Dependent Activity and Selectivity

Angewandte Chemie International Edition, Journal Year: 2018, Volume and Issue: 57(51), P. 16811 - 16815

Published: Nov. 7, 2018

Photocatalytic conversion of diluted CO2 into solar fuel is highly appealing yet still in its infancy. Herein, we demonstrate the metal-node-dependent performance for photoreduction by constructing Ni metal-organic framework (MOF) monolayers (Ni MOLs). In (10 %), MOLs exhibit a highest apparent quantum yield 1.96 % with CO selectivity 96.8 %, which not only exceeds reported systems but also superior to most catalysts pure . Whereas isostructural Co almost inactive , indicating dependent on metal nodes. Experimental and theoretical investigations show that strong binding affinity crucial factor, stabilizes Ni-CO2 adducts facilitates -to-CO conversion.

Language: Английский

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Semiconductor Quantum Dots: An Emerging Candidate for CO₂ Photoreduction

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(36)

Published: July 4, 2019

As one of the most critical approaches to resolve energy crisis and environmental concerns, carbon dioxide (CO2 ) photoreduction into value-added chemicals solar fuels (for example, CO, HCOOH, CH3 OH, CH4 has attracted more attention. In nature, photosynthetic organisms effectively convert CO2 H2 O carbohydrates oxygen (O2 using sunlight, which inspired development low-cost, stable, effective artificial photocatalysts for photoreduction. Due their low cost, facile synthesis, excellent light harvesting, multiple exciton generation, feasible charge-carrier regulation, abundant surface sites, semiconductor quantum dots (QDs) have recently been identified as promising materials establishing highly efficient photosystems. Recent advances in QDs are highlighted. First, unique photophysical structural properties QDs, enable versatile applications conversion, analyzed. photocatalytic reduction then introduced three categories: binary II-VI (e.g., CdSe, CdS, ZnSe), ternary I-III-VI CuInS2 CuAlS2 ), perovskite-type CsPbBr3 , NH3 PbBr3 Cs2 AgBiBr6 ). Finally, challenges prospects with future discussed.

Language: Английский

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Identification of Halogen-Associated Active Sites on Bismuth-Based Perovskite Quantum Dots for Efficient and Selective CO₂-to-CO Photoreduction

ACS Nano, Journal Year: 2020, Volume and Issue: 14(10), P. 13103 - 13114

Published: Sept. 17, 2020

All-inorganic Pb-free bismuth (Bi) halogen perovskite quantum dots (PQDs) with distinct structural and photoelectric properties provide plenty of room for selective photoreduction CO2. However, the efficient conversion CO2-to-CO high selectivity on Bi-based PQDs driven by solar light remains unachieved, precise reaction path/mechanism promoted surface halogen-associated active sites is still poorly understood. Herein, we screen a series nontoxic stable Cs3Bi2X9 (X = Cl, Br, I) photocatalytic reduction at gas-solid interface. Among all reported pure-phase PQDs, as-synthesized Cs3Bi2Br9 exhibited highest efficiency generating 134.76 μmol g-1 CO yield 98.7% under AM 1.5G simulated illumination. The intermediates were dynamically monitored precisely unraveled based in situ DRIFTS investigation. In combination DFT calculation, it was revealed that Br allow optimizing coordination modes surface-bound intermediate species reducing energy rate-limiting step COOH- formation from •CO2-. This work presents mechanistic insight into halogen-involved catalytic mechanism fuel production.

Language: Английский

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Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Small Structures, Journal Year: 2020, Volume and Issue: 2(1)

Published: Sept. 30, 2020

Photocatalytic CO 2 reduction attracts substantial interests for the production of chemical fuels via solar energy conversion, but activity, stability, and selectivity products were severely determined by efficiencies light harvesting, charge migration, surface reactions. Structural engineering is a promising tactic to address aforementioned crucial factors boosting photoreduction. Herein, timely comprehensive review focusing on recent advances in photocatalytic conversion based design strategies over nano‐/microstructure, crystalline band structure, structure interface provided, which covers both thermodynamic kinetic challenges photoreduction process. The key parameters essential tailoring size, morphology, porosity, bandgap, surface, or interfacial properties photocatalysts are emphasized toward efficient selective into valuable chemicals. New trends structural meet demands prominent activity also introduced. It expected furnish guideline inside‐and‐out state‐of‐the‐art with well‐defined structures conversion.

Language: Английский

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Porous Two-Dimensional Materials for Photocatalytic and Electrocatalytic Applications

Matter, Journal Year: 2020, Volume and Issue: 2(6), P. 1377 - 1413

Published: June 1, 2020

Language: Английский

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