Gradient‐Tuned VO₄ Vacancies in BiVO₄ Photoanode for Boosting Bulk Hole Transport and Oxygen Evolution Reaction Performance

Advanced Functional Materials, Год журнала: 2024, Номер 34(30)

Опубликована: Фев. 29, 2024

Abstract Although bismuth vanadate (BiVO 4 ) photoanode has been widely used, the solar‐driven oxygen evolution reaction (OER) performance is constrained due to substantial bulk recombination and poor mobility of charge carriers. Herein, a facile solvothermal post‐treatment approach that employs N,N‐dimethylformamide (DMF) developed induce VO vacancy gradient from surface BiVO film, which not only improves diffusion but also establishes an advantageous upward band promote hole transport. Under Air Mass 1.5 Global (AM1.5G) simulated solar illumination, optimized with (denoted as B(VO) 1‐δ exhibits excellent OER separation efficiency 74.4% at 1.23 V versus reversible hydrogen electrode (RHE) incident‐photon‐to‐current conversion 30.7% 445 nm, 1.2 1.4 times higher than pristine , respectively. After loading nickel‐iron hydroxyl oxide (NiFeOOH) cocatalyst, photocurrent density escalates 5.92 mA cm −2 in scavenger (Na 2 SO 3 solution 5.07 potassium borate buffer RHE, far superior . This work highlights gradient‐tuned vacancies can effectively modulate structure transfer photoanode, providing new strategy for boosting water splitting performance.

Язык: Английский

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Recent progress in hydrogen: From solar to solar cell

Journal of Material Science and Technology, Год журнала: 2023, Номер 176, С. 236 - 257

Опубликована: Сен. 16, 2023

Язык: Английский

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Fabrication of Fe2O3/BiVO4 heterojunction by doping method to improve the solar water splitting performance of BiVO4

Journal of Alloys and Compounds, Год журнала: 2023, Номер 949, С. 169822 - 169822

Опубликована: Март 28, 2023

Язык: Английский

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Cation-exchange-upgraded nanostructures for photocatalysts

Chem, Год журнала: 2023, Номер 10(3), С. 800 - 831

Опубликована: Дек. 19, 2023

Язык: Английский

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Tailoring the Surface Termination of BiVO₄ Photoanodes Using Ammonium Metavanadate Enhances the Solar Water Oxidation Performance

ACS Energy Letters, Год журнала: 2024, Номер 9(7), С. 3308 - 3315

Опубликована: Июнь 11, 2024

Altering the surface stoichiometry of semiconductor electrodes is known to affect photoelectrochemical (PEC) response. To date, several reports have hinted at influence Bi:V ratio on solar water oxidation performance BiVO4 photoanodes, but only a handful strategies been reported afford tuning such stoichiometry, while comprehensive understanding an atomic level role termination remains elusive. Herein, we report new methodology that modulates and maximizes PEC toward oxygen evolution reaction (OER). The presence ammonium metavanadate drastically reduces recombination improving charge separation. Detailed characterization revealed this treatment filled native vanadium vacancies, which usually act as centers, inducing significant increase in density reinforced built-in electric field drives Interestingly, coating with NiFeOx improves, especially, separation V-modified BiVO4. Results suggest altered energetics BiVO4, leading improved band alignment across interface. Overall, these results provide platform modulate thin films shedding light mechanisms by governs

Язык: Английский

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Toward Efficient Utilization of Photogenerated Charge Carriers in Photoelectrochemical Systems: Engineering Strategies from the Atomic Level to Configuration

Chemical Reviews, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 21, 2024

Photoelectrochemical (PEC) systems are essential for solar energy conversion, addressing critical and environmental issues. However, the low efficiency in utilizing photogenerated charge carriers significantly limits overall conversion. Consequently, there is a growing focus on developing strategies to enhance photoelectrode performance. This review systematically explores recent advancements PEC system modifications, spanning from atomic nanoscopic levels configuration engineering. We delve into relationships between structures, intrinsic properties, kinetics of carriers, their utilization. Additionally, we propose future directions perspectives more efficient systems, offering valuable insights potential innovations field.

Язык: Английский

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Piezoelectric Polarization Assisted Surface Defect Engineering to Improve BiVO4 Photoelectrochemical Water Splitting

Catalysis Letters, Год журнала: 2024, Номер 154(8), С. 4157 - 4168

Опубликована: Март 12, 2024

Язык: Английский

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Effective Charge Separation in Photoelectrochemical Water Splitting: A Review from Advanced Evaluation Methods to Materials Design

Sustainable Energy & Fuels, Год журнала: 2024, Номер 8(11), С. 2357 - 2382

Опубликована: Янв. 1, 2024

The total efficiency of PEC water splitting can be divided into light absorption, charge separation, and surface injection efficiencies. Charge separation process in ns–μs is valuable to modulate but challenging clarify the working mechanism.

Язык: Английский

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High-efficiency oxygen evolution on γ-Fe2O3 catalysts with BiVO4 photoabsorbers and TpAQ hole transport layers for photoelectrochemical water splitting

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 689, С. 137213 - 137213

Опубликована: Март 2, 2025

Язык: Английский

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Utilizing Se vacancies as electronic traps to synergize impedance matching and dipole polarization with ultrathin strategy to boost Fe-Se electromagnetic wave absorption

Chemical Engineering Journal, Год журнала: 2023, Номер 480, С. 147793 - 147793

Опубликована: Ноя. 30, 2023

Язык: Английский

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