Fabricating of Fe2O3/BiVO4 heterojunction based photoanode modified with NiFe-LDH nanosheets for efficient solar water splitting

Bai, Shouli; Chu, Haomiao; Xiang, Xu; Luo, Ruixian; He, Jing

doi:10.1016/j.cej.2018.05.109

Cited by 188 publications

(70 citation statements)

References 39 publications

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“…NiFe-based LDHs with an attractive 2D lamellar structure and tunable chemical compositionh ave been recognized as the precursorf or high-performance and low-cost OECs in alkaline media. [18][19][20] However,c ritical issues such as poor conduc-Photoelectrochemical (PEC) water splitting has the potential to efficiently converti ntermittent solar energy into storable hydrogen fuel. However,p oor charge separation and transfer ability as well as sluggish surfaceo xygen evolution reaction (OER) kinetics of the photoelectrode severely hindert he advance in PEC performance.…”

Section: Introductionmentioning

confidence: 99%

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Chen

Fan

et al. 2020

ChemSusChem

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Photoelectrochemical (PEC) water splitting has the potential to efficiently convert intermittent solar energy into storable hydrogen fuel. However, poor charge separation and transfer ability as well as sluggish surface oxygen evolution reaction (OER) kinetics of the photoelectrode severely hinder the advance in PEC performance. Herein, a facile electrodeposition method was used to integrate Mo‐doped NiFe‐layered double hydroxide onto a NiOx/Ni‐protected Si photoanode for enhanced PEC water oxidation. Mo doping contributed to an increased amount of oxygen vacancies, whereas a dynamic surface self‐reconstruction was induced by Mo leaching under PEC OER conditions. This led to enhanced PEC performance with an onset potential of 0.87 V vs. reversible hydrogen electrode (RHE), a photocurrent density of 39.3 mA cm−2 at 1.23 V vs. RHE, a fill factor of 0.38, and a solar‐to‐oxygen conversion efficiency of 5.3 %, along with a stability of 130 h continuous PEC reaction. The performance was superior to that of the undoped NiFe‐LDH/NiOx/Ni/Si (4.3 %), which was attributed to the elevated interface charge separation, fast charge transfer, and accelerated OER kinetics.

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Section: Introductionmentioning

confidence: 99%

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Chen

Fan

et al. 2020

ChemSusChem

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“…However, the actual conversion efficiency achieved with BiVO 4 ‐based photoanodes is far below what is expected, suffering from the charge recombination, slow carrier transport, sluggish water oxidation, and poor stability . Therefore, diverse methods have been developed to further improve the PEC performances of BiVO 4 , including the element doping, facet engineering, shape‐control, defect making, and hetero‐construction . However, the poor surface catalytic activity for water‐oxidation still inhered in these BiVO 4 photoanodes, which is a critical step for determining the final oxygen evolution activities and solar conversion efficiency.…”

Section: Figurementioning

confidence: 99%

Unveiling the Activity and Stability Origin of BiVO₄ Photoanodes with FeNi Oxyhydroxides for Oxygen Evolution

et al. 2020

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Understanding the origin of formation and active sites of oxygen evolution reaction (OER) cocatalysts is highly required for solar photoelectrochemical (PEC) devices that generate hydrogen efficiently from water. Herein, we employed a simple pH‐modulated method for in situ growth of FeNi oxyhydroxide ultrathin layers on BiVO4 photoanodes, resulting in one of the highest currently known PEC activities of 5.8 mA cm−2 (1.23 VRHE, AM 1.5 G) accompanied with an excellent stability. More importantly, both comparative experiments and density functional theory (DFT) studies clearly reveal that the selective formation of Bi−O−Fe interfacial bonds mainly contributes the enhanced OER activities, while the construction of V−O−Ni interfacial bonds effectively restrains the dissolution of V5+ ions and promotes the OER stability. Thereby, the synergy between iron and nickel of FeNi oxyhydroxides significantly improved the PEC water oxidation properties of BiVO4 photoanodes.

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“…Therefore, countless efforts have been devoted to fabricate the efficient and alternative OER cocatalysts to improve the PEC water splitting efficiency, such as transition metal oxides, metallic hydroxides, and C‐doped nanomaterials . Among these materials, the hot topic of metallic hydroxides in the field of catalysis has demonstrated that some metal atoms could show excellent OER catalytic activity, which results from the abundant metal sites acted as the active center . Especially, the introduction of Fe or Ni atom as active sites in the OER process could accelerate the reaction kinetics toward water oxidation, thus further enhancing the PEC performance .…”

Section: Introductionmentioning

confidence: 99%

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode

Cui

Bai

et al. 2019

Energy Tech

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Kinetics play a critical role in the photoelectrochemical (PEC) system, whereas co‐catalysis is mainly responsible for reducing the reaction barrier and facilitates water splitting. Here, the unsaturated Fe sites through the metal‐organic framework (MOFs) structure promote the kinetics of water oxidation over TiO2 are successfully in situ decorated. This heterostructure further helps us to better understand the PEC behaviors of organic–inorganic hybrid systems. MIL‐100(Fe), as the typical MOFs model, is facilely achieved by an FeOOH sacrificial template method, a strategy which could anchor the compact and ultrathin MIL‐100(Fe) films on the surface of TiO2 to obtain abundant unsaturated Fe sites. The photocurrent density of MIL‐100(Fe)/TiO2 reaches about 2.4 times at 1.23 V vs reversible hydrogen electrode (RHE) compared with bare TiO2, and the incident photon to current conversion efficiency value increases up to 47% (at 390 nm). Furthermore, the photocurrent density of MIL‐100(Fe)/TiO2 is maintained at 84% after 3 h, showing that the organic component of MIL‐100(Fe) takes a nature of favorable stability. The configuration of MIL‐100(Fe)/TiO2 will bring a new insight for learning the basic function of unsaturated metal sites in the PEC system.

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Fabricating of Fe2O3/BiVO4 heterojunction based photoanode modified with NiFe-LDH nanosheets for efficient solar water splitting

Cited by 188 publications

References 39 publications

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Unveiling the Activity and Stability Origin of BiVO₄ Photoanodes with FeNi Oxyhydroxides for Oxygen Evolution

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode

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Fabricating of Fe2O3/BiVO4 heterojunction based photoanode modified with NiFe-LDH nanosheets for efficient solar water splitting

Cited by 188 publications

References 39 publications

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Integration of Oxygen‐Vacancy‐Rich NiFe‐Layered Double Hydroxide onto Silicon as Photoanode for Enhanced Photoelectrochemical Water Oxidation

Unveiling the Activity and Stability Origin of BiVO4 Photoanodes with FeNi Oxyhydroxides for Oxygen Evolution

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO2 Photoanode

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Unveiling the Activity and Stability Origin of BiVO₄ Photoanodes with FeNi Oxyhydroxides for Oxygen Evolution

In Situ Decorating Coordinatively Unsaturated Fe Sites for Boosting Water Oxidation Performance of TiO₂ Photoanode