Prospects of Z-Scheme Photocatalytic Systems Based on Metal Halide Perovskites

Akinoglu, Eser Metin; Hoogeveen, Dijon A.; Cao, Chang; Simonov, Alexandr N.; Jasieniak, Jacek J.

doi:10.1021/acsnano.0c10387

Cited by 51 publications

(42 citation statements)

References 143 publications

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“…Meanwhile, heterojunction photocatalytic systems allow oxidation/reduction reaction spatial flexibility by separating the electron–hole across two different materials. [ 46 ] The minimum potential required to split water (haloacids in case of MHP photocatalysts) is 1.23 V [ 56 ] (0.53 V for HI [ 57 ] ). A standalone photocatalyst may not offer suitable band edge potentials to carry out the redox reactions.…”

Section: Fundamentals Of Heterojunction Photocatalytic Systemsmentioning

confidence: 99%

“…This loss in the available photovoltage constrains the desired redox potentials and the use of these heterostructures for photocatalytic phenomena with a high del G value of more than 2 eV. [ 46 ] Z‐scheme heterojunctions handle photocatalytic processes, which are energetically demanding. These designs offer selectivity for the interfacial recombination of low relative energy photogenerated carriers at the junction.…”

Section: Fundamentals Of Heterojunction Photocatalytic Systemsmentioning

confidence: 99%

“…[ 45 ] The antibonding B‐site (p) orbitals in the valence band and hybridized X (p)−B (s) orbital in conduction band offers optically tunable properties in MHP that provide MHPs the upper hand over conventional semiconductor photocatalysts. [ 46 ]…”

Section: Introductionmentioning

confidence: 99%

“…[45] The antibonding B-site (p) orbitals in the valence band and hybridized X (p)−B (s) orbital in conduction band offers optically tunable properties in MHP that provide MHPs the upper hand over conventional semiconductor photocatalysts. [46] However, bare semiconductor photocatalytic systems face major limitations, which hinder their applicability. One of the challenges is poor compatibility between the light response range and strong redox ability.…”

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confidence: 99%

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Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Purohit

Yadav

Satapathi

2022

Adv Materials Inter

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photocatalyst materials for its low cost, non-toxicity, and improved photochemical stability. But its large bandgap acts as a limiting factor for fruitful utilization of solar photons. Like TiO 2 , [1] the ABO 3 and AB 2 O 4 structure materials are large bandgap semiconductors that only act in the UV region. [2] Meanwhile, the family of other oxides materials such as ABO 4 , ABO 2 , Aurivillius oxides, and ternary chalcogenides is visible light absorptive materials. Still, their unsuitable band edge alignments make them inappropriate to catalyze important reactions, inherently limiting their use. [3] Therefore, the unsatisfactory photoreduction potential of these materials due to their large bandgap and rapid charge carrier recombination properties fuel an intense desire to design new semiconductor-based photocatalyst systems [4][5][6][7] with appropriate photo properties through novel materials exploration.Recently, metal halide perovskites (MHPs) have become star performers in the global research platform. Their prominence started with the research mainly emphasizing photovoltaics and LEDs' applications and fundamental properties' investigations. Convinced with the versatile and unique properties of MHPs, their application has been extended in other novel and advanced technologies such as optical sensing, [8] X-ray detection, [9] lasing, [10] flash memory, [11] and various photocatalytic processes including organic contaminant degradation, [12][13][14][15][16][17][18][19][20][21][22][23][24] CO 2 reduction, [25][26][27][28][29][30][31][32][33][34][35][36][37] organic reactions, [38][39][40][41] etc. Particularly, MHP nanocrystals in photoredox organic synthesis such as CC, CO, and CN bond formations have been proved to be revolutionary in fundamental applications of material synthesis and drug development. [42][43][44] MHPs have beneficial features such as low-cost production, tunable bandgap, long diffusion lengths, high charge carrier mobility, easy solution synthesis methods, a desired charge transfer for redox reactions, and unusual defects tolerance, rendering them a potential candidate for photocatalytic applications. [45] The antibonding B-site (p) orbitals in the valence band and hybridized X (p)−B (s) orbital in conduction band offers optically tunable properties in MHP that provide MHPs the upper hand over conventional semiconductor photocatalysts. [46] However, bare semiconductor photocatalytic systems face major limitations, which hinder their applicability. One of the challenges is poor compatibility between the light response range and strong redox ability. The bandgap requirement Photocatalytic hydrogen generation paves a promising way to mitigate the global energy crisis and deteriorative environmental issues. Among different materials, metal halide perovskites (MHPs) have recently emerged as a promising class of inexpensive and easy-to-make semiconductors for various photocatalytic applications such as organic contaminant degradation, CO 2 reduction, H 2 evolution, and N 2 fixation. Although...

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Section: Fundamentals Of Heterojunction Photocatalytic Systemsmentioning

confidence: 99%

Section: Fundamentals Of Heterojunction Photocatalytic Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Purohit

Yadav

Satapathi

2022

Adv Materials Inter

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Optimizing Atomic Hydrogen Desorption of Sulfur‐Rich NiS₁₊_x Cocatalyst for Boosting Photocatalytic H₂ Evolution

et al. 2021

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Low‐cost transition‐metal chalcogenides (MSx) are demonstrated to be potential candidate cocatalyst for photocatalytic H2 generation. However, their H2‐generation performance is limited by insufficient quantities of exposed sulfur (S) sites and their strong bonding with adsorbed hydrogen atoms (SHads). To address these issues, an efficient coupling strategy of active‐site‐enriched regulation and electronic structure modification of active S sites is developed by rational design of core–shell Au@NiS1+x nanostructured cocatalyst. In this case, the Au@NiS1+x cocatalyst can be skillfully fabricated to synthesize the Au@NiS1+x modified TiO2 (denoted as TiO2/Au@NiS1+x) by a two‐step route. Photocatalytic experiments exhibit that the resulting TiO2/Au@NiS1+x(1.7:1.3) displays a boosted H2‐generation rate of 9616 µmol h−1 g−1 with an apparent quantum efficiency of 46.0% at 365 nm, which is 2.9 and 1.7 times the rate over TiO2/NiS1+x and TiO2/Au, respectively. In situ/ex situ XPS characterization and density functional theory calculations reveal that the free‐electrons of Au can transfer to sulfur‐enriched NiS1+x to induce the generation of electron‐enriched Sδ− active centers, which boosts the desorption of Hads for rapid hydrogen formation via weakening the strong SHads bonds. Hence, an electron‐enriched Sδ−‐mediated mechanism is proposed. This work delivers a universal strategy for simultaneously increasing the active site number and optimizing the binding strength between the active sites and hydrogen adsorbates.

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Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

et al. 2022

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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 a major bottleneck. Halide perovskites, a category of diversified semiconductor materials with suitable energy‐band‐enabled high‐light‐utilization efficiencies, exceptionally long charge‐carrier‐diffusion‐length‐facilitated charge transport, and readily tailorable compositional, structural, and morphological properties, have emerged as a new class of photocatalysts for efficient hydrogen evolution, CO2 reduction, and various organic synthesis reactions. Despite the noticeable progress, the development of high‐performance halide perovskite photocatalysts (HPPs) is still hindered by several key challenges: the strong ionic nature and high hydrolysis tendency induce instability and an unsatisfactory activity due to the need for a coactive component to realize redox processes. Herein, the recently developed advanced strategies to enhance the stability and photocatalytic activity of HPPs are comprehensively reviewed. The widely applicable stability enhancement strategies are first articulated, and the activity improvement strategies for fuel production and chemical synthesis are then explored. Finally, the challenges and future perspectives associated with the application of HPPs in efficient production of fuels and value‐added chemicals are presented, indicating the irreplaceable role of the HPPs in the field of photocatalysis.

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Prospects of Z-Scheme Photocatalytic Systems Based on Metal Halide Perovskites

Cited by 51 publications

References 143 publications

Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Optimizing Atomic Hydrogen Desorption of Sulfur‐Rich NiS₁₊_x Cocatalyst for Boosting Photocatalytic H₂ Evolution

Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

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Prospects of Z-Scheme Photocatalytic Systems Based on Metal Halide Perovskites

Cited by 51 publications

References 143 publications

Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Metal Halide Perovskite Heterojunction for Photocatalytic Hydrogen Generation: Progress and Future Opportunities

Optimizing Atomic Hydrogen Desorption of Sulfur‐Rich NiS1+x Cocatalyst for Boosting Photocatalytic H2 Evolution

Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

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Optimizing Atomic Hydrogen Desorption of Sulfur‐Rich NiS₁₊_x Cocatalyst for Boosting Photocatalytic H₂ Evolution