Integrated Heterostructure of PDA/Bi‐AgIn5S8/TiO2 for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure

Guan, Peng; Bai, Hongye; Li, Chunfa; Ge, Yilin; Xu, Dongbo; Chen, Biyi; Xia, Teng; Fan, Weiqiang; Shi, Weidong

doi:10.1002/admi.201701574

Cited by 30 publications

(17 citation statements)

References 48 publications

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“…There is urgent needs for photoanodes with sufficient light absorption, fast charge separation, and transfer process to achieve high solar to hydrogen (STH) efficiency . To date, a wide range of semiconductors including TiO 2 , Fe 2 O 3 , BiVO 4 , ZnO, and WO 3 have been studied for PEC water oxidation. Among them, WO 3 as one of the most promising semiconductors has attracted tremendous attention due to its narrow indirect band gap ( E g = 2.5–2.8 eV).…”

Section: Introductionmentioning

confidence: 99%

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

Kong

Zhang

Liu

et al. 2018

Adv Materials Inter

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It is a serious challenge to develop photoanodes with fast charge separation efficiency and surface reaction kinetics. Herein, the N doped carbon dot modified WO3 nanoflake (NCDs/WO3) is constructed by impregnation method. The resulting NCDs/WO3 exhibits an excellent photocurrent density of 1.42 mA cm−2 (1.0 V vs saturated calomel electrode, SCE) in 1 m H2SO4 solution under AM 1.5 G irradiation, which is 2.25 times higher than that of the pristine WO3. In addition, the onset potential of NCDs/WO3 photoanode represents a cathodic shift of 70 mV, indicating the charge separation and transfer process are both promoted. These results demonstrate N doped CD modified WO3 can further enhance the conductivity and electrochemical activity surface area, which contributes to the higher photoelectrochemical (PEC) performance. This work provides an efficient strategy for the development of doping carbon material with heteroatoms to increase the charge transfer and charge separation efficiency in PEC water oxidation.

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Section: Introductionmentioning

confidence: 99%

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

Kong

Zhang

Liu

et al. 2018

Adv Materials Inter

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“…Preparation of TiO 2 Nanorods: The TiO 2 nanorods were prepared on FTO glass substrate via a hydrothermal synthesis based on the previous works. [71] In brief, tetrabutyl titanate (1.5 mL) was slowly added to the mixed solution (30 mL of hydrochloric acid and 30 mL of deionized water) under magnetic stirring, until the solution became transparent. The FTO substrate was put into a Teflon-lined stainless steel autoclave with above mixture solution and heated at 180 C for 6 h. After cooling naturally to room temperature, the formed TiO 2 nanorods grown on the FTO substrate were washed with anhydrous ethanol and deionized water.…”

Section: Discussionmentioning

confidence: 99%

“…The TiO 2 nanorods were prepared on FTO glass substrate via a hydrothermal synthesis based on the previous works . In brief, tetrabutyl titanate (1.5 mL) was slowly added to the mixed solution (30 mL of hydrochloric acid and 30 mL of deionized water) under magnetic stirring, until the solution became transparent.…”

Section: Methodsmentioning

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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“…Fan, Shi, and coworkers modified TiO 2 nanowires (100 nm) with a AgIn 5 S 8 film doped with bismuth (80 °C, 1.5 h) followed by developing a PDA layer with soaking in dopamine/Tris solution for 1–5 h . Well‐defined XPS binding energy peaks are consistent with Ag of AgIn 5 S 8 (3d 5/2 367.5 eV and 3d 3/2 373.5 eV), In (3d 5/2 444.3 eV and 3d 3/2 451.3 eV), and S (2p 3/2 161.4 eV and 2p 1/2 162.8 eV).…”

Section: Miscellaneous Transformationsmentioning

confidence: 95%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

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Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

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Integrated Heterostructure of PDA/Bi‐AgIn₅S₈/TiO₂ for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure

Cited by 30 publications

References 48 publications

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

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

Polydopamine – its Prolific Use as Catalyst and Support Material

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Integrated Heterostructure of PDA/Bi‐AgIn5S8/TiO2 for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure

Cited by 30 publications

References 48 publications

N Doped Carbon Dot Modified WO3 Nanoflakes for Efficient Photoelectrochemical Water Oxidation

N Doped Carbon Dot Modified WO3 Nanoflakes for Efficient Photoelectrochemical Water Oxidation

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

Polydopamine – its Prolific Use as Catalyst and Support Material

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Integrated Heterostructure of PDA/Bi‐AgIn₅S₈/TiO₂ for Photoelectrochemical Hydrogen Production: Understanding the Synergistic Effect of Multilayer Structure

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

N Doped Carbon Dot Modified WO₃ Nanoflakes for Efficient Photoelectrochemical Water Oxidation

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