Large-area all-perovskite-based coplanar photoelectrodes for scaled-up solar hydrogen production

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3604 - 3617

Published: Jan. 1, 2024

Large-scale solar hydrogen production is enabled by the treatment of perovskite films through additive-added antisolvent bathing, achieving a solar-to-hydrogen efficiency 9.89% and an outstanding 145.56 μmol h −1 cm −2 .

Language: Английский

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Rapid Surface Reconstruction of In₂S₃ Photoanode via Flame Treatment for Enhanced Photoelectrochemical Performance

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: May 9, 2024

Abstract Surface reconstruction, reorganizing the surface atoms or structure, is a promising strategy to manipulate materials' electrical, electrochemical, and catalytic properties. Herein, rapid reconstruction of indium sulfide (In 2 S 3 ) demonstrated via high‐temperature flame treatment improve its charge collection The process selectively transforms In into diffusionless O layer with high crystallinity. Additionally, it controllably generates bulk sulfur vacancies within few seconds, leading surface‐reconstructed (sr‐In ). When using those sr‐In as photoanode for photoelectrochemical water splitting devices, these dual functions /bulk reduce recombination in region, thus improving photocurrent density stability. With optimized demonstrates significant 8.5 mA cm −2 at 1.23 V versus reversible hydrogen electrode (RHE), marking 2.5‐fold increase compared pristine (3.5 More importantly, exhibits an impressive 7.3 0.6 RHE iodide oxidation reaction. A practical scalable also showcased treatment. This work provides new insights engineering sulfide‐based semiconductors, making breakthrough developing efficient solar‐fuel energy devices.

Language: Английский

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Efficient and Ultrastable Iodide Oxidation Reaction Over Defect‐Passivated Perovskite Photoanode for Unassisted Solar Fuel Production

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(32)

Published: May 27, 2024

Abstract Recently, lead halide perovskites have emerged as promising photoanode materials for efficient hydrogen production. However, the sluggish kinetics of oxygen evolution reaction (OER) and interfacial defect‐mediated charge accumulation inevitably result in efficiency loss degradation perovskite photoanodes. Herein, a defect‐passivated electron transport layer‐based combined with catalyst layer favorable is introduced iodide oxidation bearing small thermodynamic barrier rapid compared to OER solar fuel generation. The resulting revealed saturated photocurrent density 22.4 mA cm −2 at 0.3 V versus reversible electrode (V RHE ) an impressive onset potential −0.2 well durability 225 h neutral electrolyte. In addition, unbiased hydrogen‐production device comprising Pt coil electrocatalyst demonstrated, achieving remarkable solar‐to‐chemical conversion 11.45% stable operation 25 h. Moreover, wireless artificial leaf‐structured realizing solar‐driven generation natural sea water under outdoor sunlight presented.

Language: Английский

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Chemistry of Materials Underpinning Photoelectrochemical Solar Fuel Production

Chemical Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

Since its inception, photoelectrochemistry has sought to power the generation of fuels, particularly hydrogen, using energy from sunlight. Efficient and durable photoelectrodes, however, remain elusive. Here we review current state art, focusing our discussion on advances in photoelectrodes made past decade. We open by briefly discussing fundamental photoelectrochemical concepts implications for photoelectrode function. next a broad range semiconductor broken down material class (oxides, nitrides, chalcogenides, mature photovoltaic semiconductors), identifying intrinsic properties their influence performance. then identify innovative situ operando techniques directly probe photoelectrode|electrolyte interface, enabling direct assessment structure-property relationships catalytic surfaces active reaction environments. close considering more complex fuel-forming reactions (carbon dioxide nitrogen reduction, as well alternative oxidation reactions), where product selectivity imposes additional criteria electrochemical driving force architecture. By contextualizing recent literature within framework, seek provide direction continued progress toward achieving efficient stable photoelectrodes.

Language: Английский

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Constructing 1D/0D Sb2S3/Cd0.6Zn0.4S S-scheme heterojunction by vapor transport deposition and in-situ hydrothermal strategy towards photoelectrochemical water splitting

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 975, P. 172926 - 172926

Published: Nov. 22, 2023

Language: Английский

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Photoilluminated Redox-Processed Rh₂P Nanoparticles on Photocathodes for Stable Hydrogen Production in Acidic Environments

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(17), P. 21953 - 21964

Published: April 17, 2024

While photoelectrochemical (PEC) cells show promise for solar-driven green hydrogen production, exploration of various light-absorbing multilayer coatings has yet to significantly enhance their generation efficiency. Acidic conditions can the evolution reaction (HER) kinetics and reduce overpotential losses. However, prolonged acidic exposure deactivates noble metal electrocatalysts, hindering long-term stability. Progress requires addressing catalyst degradation enable stable, efficient, PEC cells. Here, we proposed a process design based on photoilluminated redox deposition (PRoD) approach. We use this grow crystalline Rh2P nanoparticles (NPs) with size 5–10 30 nm-thick TiO2, without annealing. Atomically precise control was performed by using several cyclic voltammetry cycles coincident light irradiation create system optimal catalytic activity. The optimized photocathode, composed Rh2P/TiO2/Al–ZnO/Cu2O/Sb–Cu2O/ITO, achieved an excellent photocurrent density 8.2 mA cm–2 at 0 VRHE durable water-splitting in strong solution. Specifically, Rh2P-loaded photocathode exhibited 5.3-fold enhancement mass activity compared that utilizing just Rh catalyst. Furthermore, situ scanning transmission electron microscopy (STEM) observe real-time growth NPs liquid cell.

Language: Английский

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Fabrication of Flower-Shaped Sb₂S₃/Fe₂O₃ Heterostructures for Enhanced Photoelectrochemical Performance

Langmuir, Journal Year: 2024, Volume and Issue: 40(23), P. 12097 - 12106

Published: May 30, 2024

Antimony sulfide (Sb2S3) has been recognized as a catalytic material for splitting water by solar energy because of its suitable narrow band gap, high absorption coefficient, and abundance elements. However, many deep-level defects in Sb2S3 result significant recombination photoexcited electron–hole pairs, weakening photoelectrochemical performance. Here, using simple hydrothermal spin-coating method, we fabricated step-scheme heterojunction Sb2S3/α-Fe2O3 to improve the performance pure Sb2S3. Our photoanode photocurrent density 1.18 mA/cm2 at 1.23 V vs reversible hydrogen electrode, 1.39 times higher than that (0.84 mA/cm2). In addition, our lower onset potential, absorbance intensity, incident photon-to-current conversion efficiency, applied bias charge transfer resistance compared Based on ultraviolet photoelectron spectroscopy, constructed structure explain enhancement. This work offers promising strategy optimize photoelectrodes solar-driven splitting.

Language: Английский

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Engineering Ultrathin Cu_xS Layer on Planar Sb₂S₃ Photocathode to Enhance Photoelectrochemical Transformation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(32)

Published: May 16, 2024

Abstract Sb 2 S 3 has been extensively used as light absorber for photoelectrochemical cell. However, its p‐type nature may result in the formation of Schottky junction with substrates, thus hindering collection photogenerated holes. Herein, an ultrathin Cu x layer is successfully engineered bottom first time. Capitalizing on impressive electrical properties and superior optical properties, exhibits a high work function 4.90 eV, which causes upward band bending , forming hole‐transparent structure ohmic contact. The transparency enables back‐illumination /Cu platform, facilitating integration intricate catalyst layers transformation. When modified Pt nanoparticles, photocurrent density reaches −5.38 mA cm −2 at 0 V vs . RHE, marking fourfold increase compared to photocathode without layer. introducing molecular hybrid TC‐CoPc@carbon black, remarkable average −0.44 overpotential obtained CO reduction reaction, while less than −0.03 S.

Language: Английский

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Engineering Ultrathin Cu_xS Layer on Planar Sb₂S₃ Photocathode to Enhance Photoelectrochemical Transformation

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(32)

Published: May 16, 2024

Abstract Sb 2 S 3 has been extensively used as light absorber for photoelectrochemical cell. However, its p‐type nature may result in the formation of Schottky junction with substrates, thus hindering collection photogenerated holes. Herein, an ultrathin Cu x layer is successfully engineered bottom first time. Capitalizing on impressive electrical properties and superior optical properties, exhibits a high work function 4.90 eV, which causes upward band bending , forming hole‐transparent structure ohmic contact. The transparency enables back‐illumination /Cu platform, facilitating integration intricate catalyst layers transformation. When modified Pt nanoparticles, photocurrent density reaches −5.38 mA cm −2 at 0 V vs . RHE, marking fourfold increase compared to photocathode without layer. introducing molecular hybrid TC‐CoPc@carbon black, remarkable average −0.44 overpotential obtained CO reduction reaction, while less than −0.03 S.

Language: Английский

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From insoluble to processable: Aminic solvent dissolution of donor–acceptor conjugated network polymers for fabrication of photocatalytic thin film

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153569 - 153569

Published: June 28, 2024

Conjugated network polymers (CNPs) have gained considerable attention as heterogeneous photocatalysts, however, their limited solubility in solvents poses a significant challenge employing CNPs for photoreactors. Herein, we report the chemical dissolution of aminic to enhance solution processability. The CNPs, synthesized via Knoevenagel polycondensation, were dissolved into corresponding polymer inks, forming thin films on various substrates through mild heating. Residual functional groups CNP surface provided latent reactive sites liquid amines, facilitating structural disentanglement and without hindering π-conjugation. resulting FTO electrodes exhibited broader light absorbance > 2-fold enhanced photoresponse compared powder films. Photocatalytic production H2O2 using large-area film (254.4 cm2) demonstrated sustained activity with rate 0.21 mM h−1 over 14 h sacrificial agents. These findings lay groundwork applying photocatalysts chemical, optical, electronic applications.

Language: Английский

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