Enhanced Charge Carrier Dynamics on Sb₂Se₃ Photocathodes for Efficient Photoelectrochemical Nitrate Reduction to Ammonia

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 16, 2024

Abstract Ammonia (NH 3 ) is recognized as a transportable carrier for renewable energy fuels. Photoelectrochemical nitrate reduction reaction (PEC NO RR) offers sustainable solution nitrate‐rich wastewater treatment by directly converting solar to ammonia. In this study, we demonstrate the highly selective PEC ammonia production from RR constructing CoCu/TiO 2 /Sb Se photocathode. The constructed photocathode achieves an Faraday efficiency (FE) of 88.01 % at −0.2 V RHE and yield high 15.91 μmol h −1 cm −2 −0.3 with excellent onset potential 0.43 . Dynamics experiments theoretical calculations have demonstrated that possesses light absorption capacity, transfer capability, charge separation efficiencies. can effectively adsorb reactant − intermediate, CoCu co‐catalyst increases maximum Gibbs free difference between HER. Meanwhile, Co species enhances spin density Cu, states near Fermi level in pdos, which results activity on This work provides new avenue feasibility efficient synthesis wastewater.

Language: Английский

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Improving Charge Transfer Beyond Conventional Heterojunction Photoelectrodes: Fundamentals, Strategies and Applications

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: June 20, 2024

Abstract Photoelectrochemical (PEC) cells are regarded as a promising approach to convert sunlight chemical fuels, whereas the serious photo‐induced charge recombination of semiconductor photoelectrode hinders its solar conversion efficiency. Over past few decades, designing and constructing heterojunction photoelectrodes via thermodynamically favorable transfer have been proven be effective in boosting separation. However, conventional construction strategy generally introduces incompatible, nonconformal, or defective interfaces, leaving considerable room improve efficiency photoelectrodes. To compensate for unsatisfied efficiency, some novel strategies, such grain boundary engineering, band gap field‐effected etc., adopted provide additional driving force, which significantly improves In this review, these strategies discussed beyond construction, prospects development applications photoanodes also proposed.

Language: Английский

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Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(12), P. 15011 - 15022

Published: March 12, 2024

Achieving a high energy density and long-cycle stability in storage devices demands competent electrochemical performance, often contingent on the innovative structural design of materials under investigation. This study explores potential transition metal selenide (TMSe), known for its remarkable activity, electronic conductivity, conversion applications. The innovation lies constructing hollow structures binary (CoNi-Se) at surface reduced graphene oxide (rGO) arranged three-dimensional (3D) morphology (CoNi-Se/rGO). 3D interconnected rGO architecture works as microcurrent collector, while porous CoNi-Se sheets originate active redox centers. Electrochemical analysis CoNi-Se/rGO based-electrode reveals distinct faradic behavior, thereby resulting specific capacitance 2957 F g–1 (1478.5 C g–1), surpassing bare with value 2149 (1074.5 g–1) current 1 A g–1. Both exhibit exceptional high-rate capabilities, retaining 83% 10 compared to In two-electrode coin cell system, device achieves 73 Wh kg–1 power 1500 W kg–1, stating an impressive 90.4% retention even after enduring 20,000 cycles. underscores composite's promise superior electrode material high-performance

Language: Английский

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Fabricating S-scheme Sb2S3@CdSe S1– quasi-one-dimensional heterojunction photoanodes by in-situ growth strategy towards photoelectrochemical water splitting

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 201, P. 250 - 260

Published: April 2, 2024

Language: Английский

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Designing Atomic Interface in Sb₂S₃/CdS Heterojunction for Efficient Solar Water Splitting

Small, Journal Year: 2024, Volume and Issue: 20(31)

Published: March 8, 2024

Abstract In the emerging Sb 2 S 3 ‐based solar energy conversion devices, a CdS buffer layer prepared by chemical bath deposition is commonly used to improve separation of photogenerated electron‐hole pairs. However, cation diffusion at /CdS interface induces detrimental defects but often overlooked. Designing stable in heterojunction essential achieve high efficiency. As proof concept, this study reports that modification with an ultrathin Al O interlayer effectively suppresses interfacial preventing Cd 2+ cations into layer. result, water‐splitting photocathode based on Ag:Sb /Al achieves significantly improved half‐cell solar‐to‐hydrogen efficiency 2.78% neutral electrolyte, as compared 1.66% for control device. This work demonstrates importance designing atomic interfaces and may provide guideline fabrication high‐performance stibnite‐type semiconductor‐based devices.

Language: Английский

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High Performance Ferroelectric‐modulated Photoelectrodes by Using Grid Charge Collector

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 22, 2024

Abstract Metal oxide‐based photoelectrochemicals (PEC) are promising for solar‐fuel conversion if the issues of excessive charge carrier recombination in bulk can be resolved. Ferroelectric modulation photoelectrodes is a remedial strategy but less available due to contradiction between screening effect and free collection. This work designed fabricated novel ferroelectric‐modulated photocathode (p‐type CuBi 2 O 4 /PbZrTiO, CBO/PZT) with gird‐like gold (G‐Au) collector under theoretical guidance. Several characterizations, including Multiphysics simulations optoelectronic interfacial electronic energy levels calculations, proved critical role G‐Au decoupling collecting screening. As result, positively polarized exhibited best performance an average H concentration around 1.5 mol (L h m ) −1 . Thus, this demonstrated successful integration ferroelectric PEC improved photocarrier collection using grid metal collector, which broadly applied other systems.

Language: Английский

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Epitaxial growth strategy for construction of Tm3+ doped and [hk1] oriented Sb2S3 nanorods S-scheme heterojunction with enhanced photoelectrochemical performance

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 475, P. 146315 - 146315

Published: Sept. 26, 2023

Language: Английский

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Critical Review on Crystal Orientation Engineering of Antimony Chalcogenide Thin Film for Solar Cell Applications

Advanced Science, Journal Year: 2023, Volume and Issue: 11(2)

Published: Nov. 8, 2023

Abstract The emerging antimony chalcogenide (Sb 2 (S x Se 1−x ) 3 , 0 ≤ 1) semiconductors are featured as quasi‐1D structures comprising 4 S(e) 6 n ribbons, this structural characteristic generates facet‐dependent properties such directional charge transfer and trap states. In terms of carrier transport, proper control over the crystal nucleation growth conditions can promote preferentially oriented favorable planes, thus enabling efficient electron transport along ribbons. Furthermore, an in‐depth understanding origin impact orientation Sb films on performance corresponding photovoltaic devices is expected to lead a breakthrough in power conversion efficiency. fact, there many studies colloidal nanomaterials. However, synthesis thin with controlled facets has recently been focus optoelectronic device applications. This work summarizes methodologies that applied fabrication films, including treatment strategies developed for engineering each process. mechanisms thoroughly analyzed. An outlook perspectives future development solar cells based recent research issues finally provided.

Language: Английский

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Efficacious performance of photoactive electrode In:SnO2/Er2S3:In2S3 in a photoelectrochemical system

Applied Materials Today, Journal Year: 2023, Volume and Issue: 32, P. 101797 - 101797

Published: March 14, 2023

Language: Английский

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Sulfur‐Supplemented Vapor Transport Deposition of Sb₂S₃ and Sb₂(S,Se)₃ for High‐Performance Hydrogen Evolution Photocathodes

Solar RRL, Journal Year: 2024, Volume and Issue: 8(5)

Published: Jan. 8, 2024

Chalcogen vacancy has long been recognized as a detrimental deep‐level defect that can induce severe charge recombination and diminish the quasi‐Fermi‐level splitting in Sb 2 S 3 Se , especially when they are prepared by physical vapor deposition vacuum. In order to counter this limitation, sulfur‐supplemented transport technique is proposed, which intentionally introduces low pressure sulfur thus afford low‐defect‐density antimony chalcogenide films. The resultant photocathodes modified with conformal TiO protection layer Pt cocatalyst demonstrate photocurrent high 20 mA cm −2 along much improved fill factor onset potential, achieving an applied bias photoconversion efficiency above 1%. This work highlights importance of passivation preferential crystalline orientation film promoting photocathode performance.

Language: Английский

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