Solar-Driven Hydrogen Generation by Metal Halide Perovskites: Materials, Approaches, and Mechanistic View

Romani, Lidia; Malavasi, Lorenzo

doi:10.1021/acsomega.0c03829

Cited by 29 publications

(43 citation statements)

References 23 publications

(155 reference statements)

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“…Compared with HI splitting, splitting of water is a four‐electron process, which requires a higher overpotential 47,109 . Furthermore, halide perovskites are very unstable in water.…”

Section: Photocatalytic Applications Of Halide Perovskite Compositesmentioning

confidence: 99%

Halide perovskite composites for photocatalysis: A mini review

Luo¹,

Zhang²,

Yang

et al. 2021

EcoMat

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Halide perovskites have attracted increasing scientific interests for photocatalysis because of their remarkable opto‐electronic properties, such as optimal band structures, long charge carrier lifetimes, high photoluminescence quantum yields, and so on. However, pure halide perovskites generally face problems of low stability, lack of active sites, and ineffective extraction of carriers, which limit their applications in photocatalytic reactions. To improve the photocatalytic activity and stability, halide perovskites are composited with other materials. Herein in this mini review, we summarize the recent progresses on the design and development of halide perovskite composites for various photocatalytic reactions including photocatalytic CO2 reduction reaction, photocatalytic hydrogen evolution reaction, photocatalytic pollutant degradation reaction, and so on. Finally, an outlook of halide perovskite for photocatalysis is provided to point up the future challenges and the possible solutions.

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“…Compared with HI splitting, splitting of water is a four‐electron process, which requires a higher overpotential 47,109 . Furthermore, halide perovskites are very unstable in water.…”

Section: Photocatalytic Applications Of Halide Perovskite Compositesmentioning

confidence: 99%

Halide perovskite composites for photocatalysis: A mini review

Luo¹,

Zhang²,

Yang

et al. 2021

EcoMat

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“…An additional experiment was performed in the presence of 10% v / v of TEOA as typical sacrificial agent and 1 wt% of Pt, which acts as co-catalyst leading to a more efficient separation of generated charges [ 11 , 42 , 67 ] and a H 2 production of 11 µmol g −1 h −1 was measured [ 34 ]. These performances were quite low respect to the most active photocatalysts for this application but represented a very encouraging seminal achievement in this innovative field of the research [ 14 , 46 , 68 , 69 ].…”

Section: Pb-free Perovskites For H 2 Evolutionmentioning

confidence: 99%

“…In addition, the hydrohalic acid can directly give the reagents for H 2 formation in a particular mechanism in which the halide ions function as hole scavenger. The last strategy implies the use of water-stable MHPs [9,14] (Figure 1c). The very recent conception of such materials allowed the first seminal utilization of MHPs directly in water for the solar-driven H 2 evolution [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The second strategy, used for the first time in 2016, foresees the exploitation of complex dynamic equilibria between perovskite precursors and perovskite powders dispersed in solution ( Figure 1 b) [ 11 ]. In order to sustain the continuous formation of suitable perovskite crystalline phases, a high concentration of hydrohalic acids (e.g., HI or HBr) has to be present in solution [ 9 , 12 , 13 , 14 ]. Indeed, their dissociation, leading to high halogen concentration, shifts the solubilization equilibrium towards the formation of MHPs.…”

Section: Introductionmentioning

confidence: 99%

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Lead-Free Metal Halide Perovskites for Hydrogen Evolution from Aqueous Solutions

et al. 2021

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Metal halide perovskites (MHPs) exploitation represents the next big frontier in photovoltaic technologies. However, the extraordinary optoelectronic properties of these materials also call for alternative utilizations, such as in solar-driven photocatalysis, to better address the big challenges ahead for eco-sustainable human activities. In this contest the recent reports on MHPs structures, especially those stable in aqueous solutions, suggest the exciting possibility for efficient solar-driven perovskite-based hydrogen (H2) production. In this minireview such works are critically analyzed and classified according to their mechanism and working conditions. We focus on lead-free materials, because of the environmental issue represented by lead containing material, especially if exploited in aqueous medium, thus it is important to avoid its presence from the technology take-off. Particular emphasis is dedicated to the materials composition/structure impacting on this catalytic process. The rationalization of the distinctive traits characterizing MHPs-based H2 production could assist the future expansion of the field, supporting the path towards a new class of light-driven catalysts working in aqueous environments.

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“…In recent times, the application of metal halide perovskites (MHPs) in the photocatalysis field has aroused great interest in view of the relatively narrow bandgaps compared to traditional metal oxide photocatalysts [7,8]. MHPs possess exclusive optical properties, viz.…”

Section: Of 11mentioning

confidence: 99%

Carbon Nitride-Perovskite Composites: Evaluation and Optimization of Photocatalytic Hydrogen Evolution in Saccharides Aqueous Solution

et al. 2020

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The application of hybrid photocatalysts made of carbon nitride and lead-free perovskites, namely DMASnBr3/g-C3N4 and PEA2SnBr4/g-C3N4, for the H2 evolution from saccharides aqueous solution is described. The novel composites were tested and compared in terms of hydrogen evolution rate (HER) under simulated solar light, using Pt as a reference co-catalyst, and glucose as a representative sacrificial biomass. The conditions were optimized to maximize H2 generation by a design of experiments involving catalyst amount, glucose concentration and Pt loading. For both materials, such parameters affected significantly H2 photogeneration, with the best performance observed using 0.5 g L−1 catalyst, 0.2 M glucose and 0.5 wt% Pt. Under optimized conditions, DMASnBr3/g-C3N4 showed a 5-fold higher HER compared to PEA2SnBr4/g-C3N4, i.e., 925 µmoles g−1 h−1 and 190 µmoles g−1 h−1, respectively (RSD ≤ 11%, n = 4). The former composite, which affords an HER 15-fold higher in aqueous glucose than in neat water, provided H2 also with no metal co-catalyst (around 140 µmoles g−1 h−1), and it was reusable for at least three photoreactions. Encouraging results were also collected by explorative tests on raw starch solution (around 150 µmoles g−1 h−1).

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Solar-Driven Hydrogen Generation by Metal Halide Perovskites: Materials, Approaches, and Mechanistic View

Cited by 29 publications

References 23 publications

Halide perovskite composites for photocatalysis: A mini review

Halide perovskite composites for photocatalysis: A mini review

Lead-Free Metal Halide Perovskites for Hydrogen Evolution from Aqueous Solutions

Carbon Nitride-Perovskite Composites: Evaluation and Optimization of Photocatalytic Hydrogen Evolution in Saccharides Aqueous Solution

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