WO<sub>3</sub> Mesoporous Nanobelts towards Efficient Photoelectrocatalysts for Water Splitting

Song, Kai; Gao, Fengmei; Yang, Weiyou; Wang, Enyan; Wang, Zhenxia; Hou, Huilin

doi:10.1002/celc.201700993

Cited by 28 publications

(17 citation statements)

References 43 publications

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“…with high stability for PEC water oxidation are often used as photoanodes. [8][9][10][11][12][13][14][15][16][17][18][19] However, the application of these materials into commercial devices is still limited by either their bandgaps that are often too large or their poor charge carrier dynamics.…”

Section: Introductionmentioning

confidence: 99%

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

et al. 2020

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FeVO4 is a potential photoanode candidate with favorable bandgap energy for absorbing visible light in the solar spectrum. However, the achieved photocurrents are still much lower than the theoretical photocurrent due to poor bulk carrier separation efficiency. Herein, the aim is to improve FeVO4 charge transport properties by searching for suitable metal doping using combinatorial methods. Thin‐film FeVO4 libraries with different doping ratios of Zn, Ni, Cr, Mo, and W are fabricated on fluorine doped tin oxide substrates using combinatorial inkjet printing and their photoelectrochemical properties screened using photoscanning droplet cell. Mo and W doping show higher current density compared with undoped FeVO4; whereas the photocurrent decreases for Ni‐ and Zn‐doped samples. The best photocurrent is achieved with 7% doping ratio of Cr. Cr is discovered as a promising dopant for the first time, which is more effective than reported Mo or W for FeVO4 photoanode. The replacement of Cr3+ to Fe3+ in FeVO4 crystal lattice helps to mainly improve the catalytic activity for charge transfer, which results in the enhancement of photoresponse of the FeVO4 photoanode.

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Section: Introductionmentioning

confidence: 99%

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

et al. 2020

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“…This result further verifies that the excellent photoelectric conversion performance of CuÀ MoS 2 /CdS catalyst comes from the introduction of MoS 2 material and the doping of Cu 2 + . [41][42][43][44] Figure 7 shows the transient photoresponse curves of different proportions of CuÀ MoS 2 /CdS composites. When the Cu 2 + doping ratio reached 5 %, the CuÀ MoS 2 /CdS samples exhibited the highest photocurrent density of 77 μA cm À 2 , which was 2.8 times of that of MoS 2 /CdS (27.5 μA cm À 2 ) and 1.7 times that of the previously reported MoS 2 /CuÀ CdS (43 μA cm À 2 ).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Cu−MoS₂/CdS Composite and Photoelectrocatalysis for Hydrogen Evolution

et al. 2021

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Transition metal ion doping is an efficient method to enhance the photoelectrochemical (PEC) performance of catalytic composite materials. In this study, CuÀ MoS 2 /CdS composite materials are successfully constructed through two-step solvothermal and liquid exfoliation methods. CdS nanorods are decorated by fewer layers of MoS 2 doped with Cu 2 +. The properties of the composites materials, such as microstructure, crystal structure and type, element valence state, and energy band structure, are obtained by XRD, XPS, and TEM. The combination of CuÀ MoS 2 and CdS effectively inhibits the recombination of photo-generated electrons and holes and improves the photo-catalytic properties of the composite materials. The PEC test results show that the CuÀ MoS 2 /CdS composite have a perfect photocurrent density of 77 μA cm À 2 , which is 12.8 and 2.8 times of those of CdS and MoS 2 /CdS, respectively. CuÀ MoS 2 /CdS composite has the lowest interfacial resistance and the best interfacial charge transfer capability due to ion doping and the inherent high conductivity of MoS 2. At 5 % doping ratio of Cu 2 + , the photoelectrocatalytic hydrogen evolution rate of CuÀ MoS 2 /CdS reaches 12.78 mmol h À 1 g À 1 , which is 60 times of that of CdS.

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“…Furthermore, the nanoporous structure creates the depletion layer and reduced diffusion distance to the photoelectrodes/electrolyte interface, which diminish recombination of electrons and holes [ 114 , 115 , 116 ]. Song et al [ 117 ] used versatile foaming-assisted electrospinning method to produce mesoporous WO 3 nanobelts which enhanced the PEC water-splitting performance compared with the as-prepared WO 3 nanofiber and WO 3 nanobelt samples. Shin et al [ 114 ] used a laser ablation method to produce tree-like nanoporous WO 3 photoanode for a photoelectrochemical water–oxidation performance.…”

Section: Heterostructured Wo 3 Nanocomposites Fmentioning

confidence: 99%

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

et al. 2020

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This review focuses on tungsten oxide (WO3) and its nanocomposites as photoactive nanomaterials for photoelectrochemical cell (PEC) applications since it possesses exceptional properties such as photostability, high electron mobility (~12 cm2 V−1 s−1) and a long hole-diffusion length (~150 nm). Although WO3 has demonstrated oxygen-evolution capability in PEC, further increase of its PEC efficiency is limited by high recombination rate of photogenerated electron/hole carriers and slow charge transfer at the liquid–solid interface. To further increase the PEC efficiency of the WO3 photocatalyst, designing WO3 nanocomposites via surface–interface engineering and doping would be a great strategy to enhance the PEC performance via improving charge separation. This review starts with the basic principle of water-splitting and physical chemistry properties of WO3, that extends to various strategies to produce binary/ternary nanocomposites for PEC, particulate photocatalysts, Z-schemes and tandem-cell applications. The effect of PEC crystalline structure and nanomorphologies on efficiency are included. For both binary and ternary WO3 nanocomposite systems, the PEC performance under different conditions—including synthesis approaches, various electrolytes, morphologies and applied bias—are summarized. At the end of the review, a conclusion and outlook section concluded the WO3 photocatalyst-based system with an overview of WO3 and their nanocomposites for photocatalytic applications and provided the readers with potential research directions.

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WO₃ Mesoporous Nanobelts towards Efficient Photoelectrocatalysts for Water Splitting

Cited by 28 publications

References 43 publications

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

Preparation of Cu−MoS₂/CdS Composite and Photoelectrocatalysis for Hydrogen Evolution

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

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WO3 Mesoporous Nanobelts towards Efficient Photoelectrocatalysts for Water Splitting

Cited by 28 publications

References 43 publications

High Throughput Discovery of Effective Metal Doping in FeVO4 for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO4 for Photoelectrochemical Water Splitting

Preparation of Cu−MoS2/CdS Composite and Photoelectrocatalysis for Hydrogen Evolution

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

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WO₃ Mesoporous Nanobelts towards Efficient Photoelectrocatalysts for Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

High Throughput Discovery of Effective Metal Doping in FeVO₄ for Photoelectrochemical Water Splitting

Preparation of Cu−MoS₂/CdS Composite and Photoelectrocatalysis for Hydrogen Evolution