A Review on MXene Synthesis, Stability, and Photocatalytic Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 13370 - 13429

Published: Sept. 12, 2022

Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental energy crises. However, grafting of expensive less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice achieve enhanced photocatalytic performance owing ability extract electrons efficiently from enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, noble-metal-free composed earth-abundant elements considered noteworthy step toward considering photocatalysis more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, carbonitrides) shown huge potential alternatives for cocatalysts. several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, high specific surface area. In addition, they exhibit Gibbs free intermediate H atom adsorption close zero than that commercial Pt-based cocatalyst, Fermi level position above H2 generation potential, an capture activate molecules. Therefore, there growing interest in MXene-based various events. this review, we focus recent advances synthesis with 0D morphologies, stability MXenes, photocatalysts evolution, degradation. The challenges possible future directions enhance are also discussed.

Language: Английский

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Metal–Organic Frameworks as Photocatalysts for Solar-Driven Overall Water Splitting

Chemical Reviews, Journal Year: 2022, Volume and Issue: 123(1), P. 445 - 490

Published: Dec. 12, 2022

Metal–organic frameworks (MOFs) have been frequently used as photocatalysts for the hydrogen evolution reaction (HER) using sacrificial agents with UV–vis or visible light irradiation. The aim of present review is to summarize use MOFs solar-driven targeting overcome current efficiency limitations in overall water splitting (OWS). Initially, fundamentals photocatalytic OWS under solar irradiation are presented. Then, different strategies that can be implemented on adapt them photocatalysis discussed detail. Later, most active reported until now HER and/or oxygen (OER) critically commented. These studies taken precedents discussion existing sunlight requirements met at large scale also discussed. last section this provides a summary state field and comments future prospects could bring closer commercial application.

Language: Английский

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Anion-exchange membrane water electrolyzers and fuel cells

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(23), P. 9620 - 9693

Published: Jan. 1, 2022

The key components, working management, and operating techniques of anion-exchange membrane water electrolyzers fuel cells are reviewed for the first time.

Language: Английский

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Computation-based regulation of excitonic effects in donor-acceptor covalent organic frameworks for enhanced photocatalysis

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 29, 2023

The strong excitonic effects widely exist in polymer-semiconductors and the large exciton binding energy (Eb) seriously limits their photocatalysis. Herein, density functional theory (DFT) calculations are conducted to assess band alignment charge transfer feature of potential donor-acceptor (D-A) covalent organic frameworks (COFs), using 1,3,5-tris(4-aminophenyl)triazine (TAPT) or 1,3,5-tris(4-aminophenyl)benzene (TAPB) as acceptors tereph-thaldehydes functionalized diverse groups donors. Given discernable D-A interaction strengths pairs, Eb can be systematically regulated with minimum TAPT-OMe. Guided by these results, corresponding COFs synthesized, where TAPT-OMe-COF possesses best activity photocatalytic H2 production trend other is associated that calculated for pairs. In addition, further alkyne cycloaddition imine linkage greatly improves stability resulting TAPT-OMe-alkyne-COF a substantially smaller exhibits ~20 times higher than parent COF.

Language: Английский

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Hydrogen-powered horizons: Transformative technologies in clean energy generation, distribution, and storage for sustainable innovation

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 56, P. 1152 - 1182

Published: Jan. 3, 2024

Language: Английский

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Solar utilization beyond photosynthesis

Nature Reviews Chemistry, Journal Year: 2022, Volume and Issue: 7(2), P. 91 - 105

Published: Dec. 19, 2022

Language: Английский

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Promoting Solar‐driven Hydrogen Peroxide Production over Thiazole‐based Conjugated Polymers via Generating and Converting Singlet Oxygen

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: Aug. 16, 2023

Solar-driven synthesis of hydrogen peroxide (H2 O2 ) from water and air provides a low-cost eco-friendly alternative route to the traditional anthraquinone method. Herein, four thiazole-based conjugated polymers (Tz-CPs: TTz, BTz, TBTz BBTz) are synthesized via aldimine condensation. BBTz exhibits highest H2 production rate 7274 μmol g-1 h-1 in pure water. Further, reaction path is analyzed by electron paramagnetic resonance (EPR), situ diffuse reflectance infrared Fourier transform (DRIFT) theoretical calculation, highlighting prominent role singlet oxygen (1 ). The generation 1 occurs through oxidation superoxide radical (⋅O2- subsequent conversion into endoperoxides [4+2] cycloaddition over BBTz, which promotes charge separation reduces barrier for production. This work new insight mechanism photocatalytic reduction molecular design superior single-polymer photocatalysts.

Language: Английский

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A review of CdS-based S-scheme for photocatalytic water splitting: Synthetic strategy and identification techniques

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 52, P. 804 - 818

Published: Sept. 22, 2023

Language: Английский

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Electronic structure reconfiguration of nickel–cobalt layered double hydroxide nanoflakes via engineered heteroatom and oxygen-vacancies defect for efficient electrochemical water splitting

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 463, P. 142396 - 142396

Published: March 13, 2023

Language: Английский

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Recent progress on photocatalytic evolution of hydrogen gas over TiO2-x-based emerging nanostructures

Materials Science in Semiconductor Processing, Journal Year: 2023, Volume and Issue: 162, P. 107444 - 107444

Published: April 10, 2023

Language: Английский

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