Switchable All Inorganic Halide Perovskite Nanocrystalline Photoelectrodes for Solar‐Driven Organic Transformations

Fernández‐Climent, Roser; Gualdrón‐Reyes, Andrés F.; García‐Tecedor, Miguel; Mesa, Camilo A.; Cardenas‐Morcoso, Drialys; Montañés, Laura; Barea, Eva M.; Mas‐Marzá, Elena; Julián‐López, Beatriz; Mora‐Seró, Iván; Giménez, Sixto

doi:10.1002/solr.202100723

Cited by 10 publications

(9 citation statements)

References 38 publications

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“…Reproduced with permission. [66] Copyright 2021, John Wiley & Sons, Inc to CO and CH 4 with performances %0.525 and 0.025 μmol g À1 , respectively. In line with how carbonaceous materials support an efficient carrier separation into a PNCs-based photoanode, Kuang and co-workers [64] showed the PEC activity of mixed halide CsPbBr 3Àx I x PNCs/carbon nanotubes (CNT) photoelectrodes, in 0.1 M TBAPF 6 , in dichloromethane, with 4 mM benzoquinone electron scavenger (organic reduction).…”

Section: Pec Properties Of Pnc-based Photoelectrodes In Low-polar Mediamentioning

confidence: 99%

“…Then, in PEC oxidation reactions, we have established the degradation of 2-mercaptobenzothizaole (2-MBT) (Figure 2C, D) and benzyl alcohol (BzOH) through CsPbBr 3 PNCs electrodes in 0.1 M TBAPF 6 , in dichloromethane. [43,66] In both systems, the photoanodes generate a higher photocurrent in the presence of the organic substrate. This fact describes the efficient oxidation of the target molecule on the PNCs/electrolyte interface, transferring electrons to the photoelectrode which are transported through the external circuit of the cell.…”

Section: Pec Properties Of Pnc-based Photoelectrodes In Low-polar Mediamentioning

confidence: 99%

“…A proof‐of‐concept tandem system of photoanode/photocatode with the same photoactive inorganic halide perovskite, CsPbBr 3 , was demonstrated for the photoelectrochemical BzOH/BzCHO oxidation/reduction (Figure 2E). [ 66 ] Even PNCs are exhibited to be efficient to trigger the oxidation/reduction of organic compounds; next step is to identify the reaction intermediates or products, with the purpose to elucidate a mechanism of molecule conversion during the PEC process.…”

Section: Pec Properties Of Pnc‐based Photoelectrodes In Low‐polar Mediamentioning

confidence: 99%

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Application of Halide Perovskite Nanocrystals in Solar‐Driven Photo(electro)Catalysis

et al. 2022

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Global warming and ecosystems contamination by fine chemicals industry have motivated to explore and develop cleaner and lower cost strategies for the energy conversion and transformation of organic compounds. [1,2] Solar-driven catalysis via photo(electro)catalysis (PEC) has emerged as a promising route to store sunlight into chemical bonds. Commonly, PEC water splitting has been studied as an approach to reduce H þ to produce green hydrogen with the oxygen evolution reaction (OER) as electron donor. As this reaction is kinetically very demanding, water can be substituted by organic compounds as electron donors due to their faster oxidation kinetics. This would increase the H 2 evolution kinetics while concomitantly producing high added-value chemicals, remediating industrial wastewaters, [3][4][5][6][7][8] and making use of semiconductor materials with highly oxidizing/ reducing power. [8,9] In a simple manner, when a semiconductor is illuminated with an energy equal or higher than its bandgap, charge carrier photogeneration and separation is promoted. Photogenerated holes are formed in the valence band (VB), where oxidation reactions take place, while electrons with higher free energy are located in the conduction band (CB) to trigger reduction reactions. [9][10][11] This is the basis of photocatalytic (PC) reactions led through nanoparticle system (Figure 1A). Then, when the photomaterial is deposited in a conducting substrate, PEC oxidation and reduction reactions can be carried out in separate compartments. [9,12,13] Here, one type of photocarriers migrate to the photoelectrode surface to conduct an interfacial PEC semireaction, while the other kind of photocarrier is transported through the external circuit to a counter electrode and perform the complementary PEC semireaction (Figure 1B). [9] Metal oxides, chalcogenides, and heterojunctions based on these materials have attracted significant attention as photocatalysts due to their wide gamut of low-cost synthetic protocols available for their preparation and facile charge carrier extraction [9,10,[13][14][15][16] Although metal oxide photoelectrodes show a high performance under UV light, high stability, and low toxicity in some cases, they are often limited by their poor light harvesting efficiency toward near-infrared wavelengths. Additionally, metal oxide photoelectrodes tend to exhibit a fast carrier recombination as well as poor charge accumulation/transport kinetics, hindering their applicability in solar water splitting applications. [10,17,18] In the case of chalcogenides, their superior optoelectronic properties are in contrast with the low stability promoted by their fast photodegradation. To reduce photodegradation and charge carrier recombination and to overcome charge transport/accumulation kinetic limitations, inner-sphere redox couples and organic substrates are commonly used to accelerate

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Section: Pec Properties Of Pnc-based Photoelectrodes In Low-polar Mediamentioning

confidence: 99%

Section: Pec Properties Of Pnc-based Photoelectrodes In Low-polar Mediamentioning

confidence: 99%

Section: Pec Properties Of Pnc‐based Photoelectrodes In Low‐polar Mediamentioning

confidence: 99%

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Application of Halide Perovskite Nanocrystals in Solar‐Driven Photo(electro)Catalysis

et al. 2022

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“…An increasingly attractive application for halide perovskites beyond photovoltaics is electrochemistry (EC) and photoelectrochemistry (PEC), where properties such as long carrier diffusion, tunable band edge positions, and band gap should enable design of new, effective electrode materials, which can be used for solar energy capture or for driving chemical transformations. − EC and PEC reactions have been carried out in aqueous and nonaqueous electrolytes using perovskites such as CsPbBr 3 and MAPbI 3 , Cs 2 PtBr 6 , and Cs 2 PtI 6 . , CsPbBr 3 nanoparticles showed promise for electrochemical conversion of organic molecules, while Cs 2 PtI 6 formed useful heterojunctions with BiVO 4 allowing photogenerated charge separation . A common difficulty that is present in all these materials when used for EC or PEC is surface stability, both on initial contact with the electrolyte and under illumination and applied or photogenerated bias.…”

Section: Introductionmentioning

confidence: 99%

“…10−14 EC and PEC reactions have been carried out in aqueous and nonaqueous electrolytes using perovskites such as CsPbBr 3 and MAPbI 3 , 13 Cs 2 PtBr 6 , 15 and Cs 2 PtI 6 . 16,17 CsPbBr 3 nanoparticles showed promise for electrochemical conversion of organic molecules, 18 while Cs 2 PtI 6 formed useful heterojunctions with BiVO 4 allowing photogenerated charge separation. 19 A common difficulty that is present in all these materials when used for EC or PEC is surface stability, both on initial contact with the electrolyte and under illumination and applied or photogenerated bias.…”

Section: ■ Introductionmentioning

confidence: 99%

Solid Electrolyte Interphase Formation in Tellurium Iodide Perovskites during Electrochemistry and Photoelectrochemistry

Liu

Yao

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Halide perovskites are promising photoelectrocatalytic materials. Their further development requires understanding of surface processes during electrochemistry. Thin films of tellurium-based vacancy-ordered perovskites with formula A2TeI6, A = Cs, methylammonium (MA), were deposited onto transparent conducting substrates using aerosol-assisted chemical vapor deposition. Thin film stability as electrodes and photoelectrodes was tested in dichloromethane containing tetrabutylammonium PF6 (TBAPF6). Using photoemission spectroscopy, we show that the formation of a solid electrolyte interphase on the surface of the Cs2TeI6, consisting of CsPF6, enhances the stability of the electrode and allows extended chopped-light chronoamperometry measurements at up to 1.1 V with a photocurrent density of 16 μA/cm2. In contrast, (CH3NH3)2TeI6 does not form a passivating layer and rapidly degrades upon identical electrochemical treatment. This demonstrates the importance of surface chemistry in halide perovskite electrochemistry and photoelectrocatalysis.

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Improving the Stability of Halide Perovskites for Photo‐, Electro‐, Photoelectro‐Chemical Applications

Du,

Liu,

Liao

et al. 2023

Adv Funct Materials

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Owing to their remarkable and adjustable optoelectronic properties, halide perovskites (HPs) have been regarded as a class of promising materials for various optoelectronic applications based on different energy conversion reactions, including photovoltaic cell, photocatalysis, electrocatalysis, and photoelectrochemical (PEC) systems. However, the low stability of HPs upon exposure to ambient conditions (e.g., water, heat, light, electricity) greatly hinders the practical applications of HPs. In the past few years, significant efforts have been devoted to enhancing the eventual stability of the perovskite‐based optoelectronic systems, mainly focusing on delivering improvements in the stabilities of halide perovskite materials and the relevant operation conditions of optoelectronic systems, which deserve in‐depth and systematic summaries. In this comprehensive review, the in‐depth environment‐induced decomposition mechanisms of typical HPs are elucidated. Simultaneously, the strategies for addressing the instability issues of halide perovskite materials are critically reviewed, including dimension control, compositional engineering, ligand passivation, and encapsulation engineering. Furthermore, the photoelectric applications based on the modified HPs and operation conditions are discussed systematically. In the last part of this review, future perspectives and outlooks toward the stability of HPs and their photoelectric applications are envisaged respectively.

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Switchable All Inorganic Halide Perovskite Nanocrystalline Photoelectrodes for Solar‐Driven Organic Transformations

Abstract: Research data are not shared.

Cited by 10 publications

References 38 publications

Application of Halide Perovskite Nanocrystals in Solar‐Driven Photo(electro)Catalysis

Application of Halide Perovskite Nanocrystals in Solar‐Driven Photo(electro)Catalysis

Solid Electrolyte Interphase Formation in Tellurium Iodide Perovskites during Electrochemistry and Photoelectrochemistry

Improving the Stability of Halide Perovskites for Photo‐, Electro‐, Photoelectro‐Chemical Applications

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