Reinforcing the Efficiency of Photothermal Catalytic CO₂ Methanation through Integration of Ru Nanoparticles with Photothermal MnCo₂O₄ Nanosheets

ACS Nano, Journal Year: 2023, Volume and Issue: 17(23), P. 23761 - 23771

Published: Nov. 20, 2023

Carbon dioxide (CO2) hydrogenation to methane (CH4) is regarded as a promising approach for CO2 utilization, whereas achieving desirable conversion efficiency under mild conditions remains significant challenge. Herein, we have identified ultrasmall Ru nanoparticles (∼2.5 nm) anchored on MnCo2O4 nanosheets prospective photothermal catalysts methanation at ambient pressure with light irradiation. Our findings revealed that exhibit dual functionality substrates localized temperature enhancement and photocatalysts electron donation. As such, the optimized Ru/MnCo2O4-2 gave high CH4 production rate of 66.3 mmol gcat-1 h-1 (corresponding 5.1 mol gRu-1 h-1) 96% selectivity 230 °C irradiation (420-780 nm, 1.25 W cm-2), outperforming most reported plasmonic metal-based catalysts. The mechanisms behind intriguing catalytic performance improvement were substantiated through comprehensive investigation involving experimental characterizations, numerical simulations density functional theory (DFT) calculations, which unveiled synergistic effects enhanced charge separation efficiency, improved reaction kinetics, facilitated reactant adsorption/activation accelerated intermediate over Ru/MnCo2O4. A comparison study showed that, identical external input energy during reaction, had much higher compared Ru/TiO2 Ru/Al2O3. This underscores pivotal role played by supports believed engender heightened interest in metal conditions.

Language: Английский

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Engineering the S-scheme heterojunction between NiO microrods and MgAl-LDH nanoplates for efficient and selective photoreduction of CO2 to CH4

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145813 - 145813

Published: Sept. 2, 2023

Language: Английский

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BiOCl Nanoflowers with High Levels of Oxygen Vacancy for Photocatalytic CO₂ Reduction

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(5), P. 3608 - 3617

Published: Feb. 28, 2023

CO2 photoreduction products, such as CO and CH4, have the potential to be further processed into valuable products fuels, making this process a promising, environmentally friendly, economically viable energy conversion technology. In study, uniform BiOCl hierarchical nanoflowers with tunable thickness abundant oxygen vacancies (OVs) were synthesized using poly(vinylpyrrolidone)/ethylene glycol-assisted self-assembly method. The OV-rich nanoflower (BiOCl-3) showed 4-fold increase in photocatalytic of compared nanosheets (BiOCl-1). Density functional theory (DFT) calculations band analysis reveal anisotropy reduction activity across different crystal facets, morphology can affect both conduction (CB) gap, resulting more negative CB edge for CO. This work provides comprehensive explanation from experimental theoretical perspectives.

Language: Английский

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Optimizing low-temperature CO2 methanation through frustrated Lewis pairs on Ni/CeO2 catalysts

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 484, P. 149471 - 149471

Published: Feb. 17, 2024

Language: Английский

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Promoting Photocatalytic CO₂ Methanation by the Construction of Cooperative Copper Dual-Active Sites

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(7), P. 5275 - 5285

Published: March 25, 2024

Selective photocatalytic CO2 methanation provides an attractive avenue to address energy and environmental issues. However, impediments such as the sluggish adsorption activation of H2O molecules, along with unexpected intermediate desorption, greatly restrict activity selectivity methanation. To these issues, we devised a dual-active site catalyst comprising Cu single atoms (SAs) nanoclusters (NCs) supported on defective TiO2 (Cu1+NCs/BT). As result, remarkable CH4 98% yield 19.63 μmol gcat.–1 h–1 can be obtained over as-prepared Cu1+NCs/BT in pure water. Mechanistic studies reveal enhanced performance could ascribed synergistic effect sites, where SAs adsorb activate CO2, while NCs boost dissociation for *H coverage. Additionally, adjacent jointly stabilize *CO reduce barrier protonation, promoting multielectron transfer process.

Language: Английский

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Artificial photosynthesis platform of 2D/2D MXene/crystalline covalent organic frameworks heterostructure for efficient photoenzymatic CO2 reduction

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 348, P. 123827 - 123827

Published: April 24, 2024

Language: Английский

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Revealing electron numbers-binding energy relationships in heterojunctions via in-situ irradiated XPS

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 356, P. 124223 - 124223

Published: May 22, 2024

Language: Английский

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Enabling CsPbBr₃ Perovskites for Photocatalytic CO₂ Methanation by Rationalizing a Z-Scheme Heterojunction with Zinc Phthalocyanine

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(3), P. 999 - 1006

Published: Feb. 16, 2024

Perovskite materials are regarded as promising photocatalysts for light harvesting, yet they exhibit low photocatalytic activity due to serious charge recombination and lack of efficient catalytic sites toward CO2 reduction. Previous studies have employed perovskites reductive sides in a Z-scheme heterojunction suppress recombination, which however still encounter selectivity because the absence specific In this work, we report strategy that enables CsPbBr3 perovskite methanation. The central concept is construction using zinc phthalocyanine (ZnPc) side. enhanced separation CsPbBr3/ZnPc provides catalytically active ZnPc with sufficient energetic electrons As result, achieves up 89% 168 μmol g–1 h–1 CH4 production, well exceeding all reported perovskite-based photocatalysts. This work insights into rational design heterojunctions artificial photosynthesis.

Language: Английский

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Non‐Metal Sulfur Doping of Indium Hydroxide Nanocube for Selectively Photocatalytic Reduction of CO₂ to CH₄: A “One Stone Three Birds” Strategy

Advanced Science, Journal Year: 2024, Volume and Issue: 11(30)

Published: June 13, 2024

Photocatalytic CO

Language: Английский

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Solar‐Driven Hydrogen Evolution from Value‐Added Waste Treatment

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(15)

Published: Feb. 13, 2024

Abstract Hydrogen is one of the most important energy alternatives to conventional fossil‐based fuel. Solar based photocatalytic hydrogen evolution (PHE) a salient approach produce fuel but its efficiency generally limited by sluggish and energy‐unfavorable oxidation reaction. Meanwhile, waste treatment has become worldwide problem clean highly demanded avoid vast greenhouse emission currently. Inspiringly, PHE can be effectively coupled with favorable photooxidation many wastes, which kills two birds stone. In this review, recent progress in presented, where typical solid, liquid, gas wastes have been briefly discussed. Focusing on understanding complicated reaction mechanism revelation products, cutting‐edge techniques for photophysics surface chemistry characterization analyzed, are imperative facilitate following investigation. Finally, developing trend existing issues current research also discussed detail so that holistic blueprint portrayed accelerate their application realistic world.

Language: Английский

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