Rational Design of Metal Halide Perovskite Nanocrystals for Photocatalytic CO₂ Reduction: Recent Advances, Challenges, and Prospects

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(6), P. 2043 - 2059

Published: May 23, 2022

Metal halide perovskite nanocrystals (MHP NCs) have attracted much scientific interest in photocatalysis. Various types of MHP photocatalysts been intensively explored photocatalytic CO2 reduction the past few years. However, some key issues, such as severe charge recombination, low stability, and origin products, created bottlenecks developing photocatalysts. Therefore, rational design MHPs is worthwhile to deepen our understanding above issues develop efficient This Focus Review highlights recent advances regarding principles toward reduction. modification strategies are clarified, an outlook on future challenges prospects also provided point out possible research directions It anticipated that this can provide guidance MHP-based help uncover common encountered by community when studying

Language: Английский

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Tuning the electronic structure of a metal–organic framework for an efficient oxygen evolution reaction by introducing minor atomically dispersed ruthenium

Carbon Energy, Journal Year: 2022, Volume and Issue: 5(2)

Published: Sept. 26, 2022

Abstract The establishment of efficient oxygen evolution electrocatalysts is great value but also challenging. Herein, a durable metal–organic framework (MOF) with minor atomically dispersed ruthenium and an optimized electronic structure constructed as electrocatalyst. Significantly, the obtained NiRu 0.08 ‐MOF doping Ru only needs overpotential 187 mV at 10 mA cm −2 Tafel slop 40 dec −1 in 0.1 M KOH for reaction, can work continuously more than 300 h. Ultrahigh mass activity achieved, reaching 56.7 A g 200 mV, which 36 times higher that commercial RuO 2 . X‐ray adsorption spectroscopy density function theory calculations reveal on metal sites MOFs expected to optimize nickel sites, thus improving conductivity catalyst optimizing energy intermediates, resulting significant optimization electrocatalytic performance. This study could provide new avenue design stable MOF electrocatalysts.

Language: Английский

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Perovskite catalysts with different dimensionalities for environmental and energy applications: A review

Separation and Purification Technology, Journal Year: 2022, Volume and Issue: 307, P. 122716 - 122716

Published: Nov. 24, 2022

Language: Английский

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Efficacy of Perovskite Photocatalysis: Challenges to Overcome

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(6), P. 1994 - 2011

Published: May 18, 2022

Having gained prominence in the design of high-efficiency solar cells, metal halide perovskites have taken center stage photocatalysis. Despite demonstrations photocatalytic activity inducing reduction and oxidation processes through visible-light excitation, long-term stability CsPbBr3 other perovskite nanocrystals nanostructures still poses a challenge. This Perspective discusses how factors such as instability arising from labile ligands, ease exchange, mobility under photoirradiation, chemical morphological transformations polar solvents, difficulty designing heterostructures pose major hurdles developing photocatalysts. The key examples organic inorganic well interfacial charge-transfer discussed here present some unique features photocatalysts highlight complexity their utilization for future conversion processes. Strategies to protect surface are needed maintain required practical applications.

Language: Английский

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Recent advances in solar‐driven CO₂ reduction over g‐C₃N₄‐based photocatalysts

Carbon Energy, Journal Year: 2022, Volume and Issue: 5(2)

Published: May 18, 2022

Abstract The persistent increase of CO 2 levels in the atmosphere, already exceeding 400 ppm, urges exploration emission reduction and recycling technologies. Ideally, photocatalytic conversion into valuable hydrocarbons realizes solar‐to‐chemical energy conversion, which is a desirable “kill two birds with one stone” strategy; namely, photoreduction can simultaneously tackle shortage keep global carbon balance. Graphitic nitride (g‐C 3 N 4 ) working on reaction deserves highlight not only for metal‐free feature that endows it low cost, tunable electronic structure, easy fabrication properties but also because its strong ability. present review concisely summarizes latest advances g‐C ‐based photocatalysts toward reduction. It starts discussion thermodynamics dynamics aspects process. Then modification strategies to promote have been discussed detail, including surface functionalization, molecule structure engineering, crystallization, morphology loading cocatalyst, constructing heterojunction. Meanwhile, intrinsic factors affecting activity selectivity are analyzed summarized. In end, challenges prospects future development highly presented.

Language: Английский

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Bromo- and iodo-bridged building units in metal-organic frameworks for enhanced carrier transport and CO2 photoreduction by water vapor

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Aug. 6, 2022

Organolead halide hybrids have many promising attributes for photocatalysis, e.g. tunable bandgaps and excellent carrier transport, but their instability constraints render them vulnerable to polar molecules limit photocatalysis in moisture. Herein, we report the construction of metal-organic frameworks based on [Pb

Language: Английский

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Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(6)

Published: July 28, 2022

Abstract Solar‐energy‐powered photocatalytic fuel production and chemical synthesis are widely recognized as viable technological solutions for a sustainable energy future. However, the requirement of high‐performance photocatalysts is major bottleneck. Halide perovskites, category diversified semiconductor materials with suitable energy‐band‐enabled high‐light‐utilization efficiencies, exceptionally long charge‐carrier‐diffusion‐length‐facilitated charge transport, readily tailorable compositional, structural, morphological properties, have emerged new class efficient hydrogen evolution, CO 2 reduction, various organic reactions. Despite noticeable progress, development halide perovskite (HPPs) still hindered by several key challenges: strong ionic nature high hydrolysis tendency induce instability an unsatisfactory activity due to need coactive component realize redox processes. Herein, recently developed advanced strategies enhance stability HPPs comprehensively reviewed. The applicable enhancement first articulated, improvement then explored. Finally, challenges future perspectives associated application in fuels value‐added chemicals presented, indicating irreplaceable role field photocatalysis.

Language: Английский

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Recent Advances on Small Band Gap Semiconductor Materials (≤2.1 eV) for Solar Water Splitting

Catalysts, Journal Year: 2023, Volume and Issue: 13(4), P. 728 - 728

Published: April 12, 2023

The conversion of solar energy into renewable H2 fuel via photoelectrochemical and photocatalytic water splitting approaches has attracted considerable attention due to its potential solve significant environmental issues. To achieve reasonable efficiency 10%, which is amenable the economic feasibility this technology, semiconductor materials, are main carrier for production, must fulfill several important criteria. One most criteria band gap material, should be low enough allow efficient absorption incident light. This because material fundamentally determines upper limit theoretical system. In work, recent advances in utilizing with a smaller than 2.1 eV instead simply-defined visible-light-responsive materials toward production from was reviewed.

Language: Английский

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Tuning Energy Transfer Pathways in Halide Perovskite–Dye Hybrids through Bandgap Engineering

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(5), P. 3352 - 3362

Published: Jan. 24, 2024

Lead halide perovskite nanocrystals, which offer rich photochemistry, have the potential to capture photons over a wide range of visible and infrared spectrum for photocatalytic, optoelectronic, photon conversion applications. Energy transfer from nanocrystal an acceptor dye in form triplet or singlet state offers additional opportunities tune properties semiconductor–dye hybrid extend excited-state lifetimes. We now successfully established key factors that dictate energy between excited CsPbI3 surface-bound rhodamine dyes using absorption emission spectroscopies. The pendant groups on influence surface binding turn kinetics, as well efficiency transfer. Of three investigated (rhodamine B, B isothiocyanate, rose Bengal), CsPbI3–rose Bengal with strongest showed highest (96%) rate constant 1 × 109 s–1. This is nearly 2 orders magnitude slower than observed pure-bromide CsPbBr3–rose (1.1 1011 s–1). Intriguingly, although single-halide CsPbBr3 nanocrystals selectively populate states Bengal, respectively, mixed perovskites were able generate mixture both states. By tuning bromide/iodide ratio thus bandgap CsPb(Br1–xIx)3 compositions, percentage singlets vs triplets delivered was systematically tuned 0 100%. perovskite-molecular hybrids discussed here provide new ways modulate semiconductor–molecular through functionalization donor engineering.

Language: Английский

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Epitaxially Grown Heterostructured SrMn₃O_6−x‐SrMnO₃ with High‐Valence Mn^3+/4+ for Improved Oxygen Reduction Catalysis

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(40), P. 22043 - 22050

Published: Aug. 10, 2021

Abstract Heterostructured catalysts show outstanding performance in electrochemical reactions owing to their beneficial interfacial properties. However, the rational design of heterostructured with desired properties and charge‐transfer characteristics is challenging. Herein, we developed a SrMn 3 O 6− x ‐SrMnO (SMO ‐SMO) heterostructure through epitaxial growth, which demonstrated excellent electrocatalyst for oxygen reduction reaction (ORR). The formation high‐valence Mn 3+/4+ promoting positive shift position d‐band center, thereby optimizing adsorption desorption ORR intermediates on heterojunction surface resulting improved catalytic activity. When SMO ‐SMO was applied as an air‐electrode catalyst rechargeable zinc‐air battery, high output voltage power density achieved, comparable battery prepared Pt/C‐IrO 2 catalysts, albeit much better cycling stability.

Language: Английский

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