Bulk and surface modified polycrystalline CuWO4 films for photoelectrochemical water oxidation

Lee, Jin Uk; Kim, Jeong Hun; Kang, Kyungwoong; Shin, Yun Seop; Kim, Jin Young; Kim, Jin Hyun; Lee, Jin Ho

doi:10.1016/j.renene.2022.12.129

Cited by 8 publications

(10 citation statements)

References 49 publications

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“…The maximum V ph can potentially reach 0.8 V if there is perfect interaction with E fn -E (O 2 /H 2 O) with no Fermi level pinning. It is slightly lower than that of BiVO 4 (0.05 V RHE -1.23 V RHE = ~1.2 V) but comparable to that of Fe 2 O 3 (0.3 V RHE -1.23 V RHE = 0.9 V) [26,35,36]. Besides establishing photovoltage at SCLJ, the formation of water oxidation intermediates at SCLJ was also confirmed in a similar manner to the cases of Fe 2 O 3 and BiVO 4 [35].…”

Section: Photoelectrochemical Properties Of Cuwo 4 Photoanodesmentioning

confidence: 61%

“…Moreover, the XRD for the three-layered CuWO 4 electrodes in Figure 3d clearly displays the peaks associated with the triclinic CuWO 4 phase. The surface and cross-sectional images of the CuWO 4 film observed via SEM in Figure 4d exhibit a worm-like grain morphology, forming a porous structure with an approximate thickness of 650 nm and feature sizes of 100-200 nm (Figure 4e) [26]. M.J.d.S.…”

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

“…Later, J.U. Lee et al [26] developed a greenish, transparent CuWO 4 polycrystalline film on FTO using a spin coating method, followed by annealing at 550 • C for 2 h. This synthesis protocol and optical images are shown in Figure 3a,b. The absorption spectrum of the three-layered CuWO 4 film in Figure 3c exhibits an absorption edge extended to 510 nm.…”

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

“…CuWO4 phase. The surface and cross-sectional images of the CuWO4 film observed via SEM in Figure 4d exhibit a worm-like grain morphology, forming a porous structure with an approximate thickness of 650 nm and feature sizes of 100-200 nm (Figure 4e) [26]. M.J.d.S.…”

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

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Emergent CuWO4 Photoanodes for Solar Fuel Production: Recent Progress and Perspectives

Lee,

Kim,

Lee

2023

Catalysts

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Solar fuel production using a photoelectrochemical (PEC) cell is considered as an effective solution to address the climate change caused by CO2 emissions, as well as the ever-growing global demand for energy. Like all other solar energy utilization technologies, the PEC cell requires a light absorber that can efficiently convert photons into charge carriers, which are eventually converted into chemical energy. The light absorber used as a photoelectrode determines the most important factors for PEC technology—efficiency, stability, and the cost of the system. Despite intensive research in the last two decades, there is no ideal material that satisfies all these criteria to the level that makes this technology practical. Thus, further exploration and development of the photoelectode materials are necessary, especially by finding a new promising semiconductor material with a suitable band gap and photoelectronic properties. CuWO4 (n-type, Eg = 2.3 eV) is one of those emerging materials that has favorable intrinsic properties for photo(electro)catalytic water oxidation, yet it has been receiving less attention than it deserves. Nonetheless, valuable pioneering studies have been reported for this material, proving its potential to become a significant option as a photoanode material for PEC cells. Herein, we review recent progress of CuWO4-based photoelectrodes; discuss the material’s optoelectronic properties, synthesis methods, and PEC characteristics; and finally provide perspective of its applications as a photoelectrode for PEC solar fuel production.

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Section: Photoelectrochemical Properties Of Cuwo 4 Photoanodesmentioning

confidence: 61%

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

Section: Synthesis Of Cuwo 4 Thin Filmmentioning

confidence: 99%

See 2 more Smart Citations

Emergent CuWO4 Photoanodes for Solar Fuel Production: Recent Progress and Perspectives

Lee,

Kim,

Lee

2023

Catalysts

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“…Tandem cells have emerged as a strategy to enhance the efficiency of watersplitting systems in artificial photosynthesis. Tandem cells are multi-junction devices that combine multiple light-absorbing materials with different bandgaps in a stacked configuration [64][65][66]. This configuration allows for the efficient capture of a broader range of the solar spectrum, thereby increasing the overall energy conversion efficiency.…”

Section: Tandem Cells To Enhance the Efficiency Of Water-splitting Sy...mentioning

confidence: 99%

Advancements in water splitting for sustainable energy generation: A review

Shahazi,

Saddam,

Majumdar

et al. 2024

Charact. Appl. Nanomater.

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Water splitting, the process of converting water into hydrogen and oxygen gases, has garnered significant attention as a promising avenue for sustainable energy production. One area of focus has been the development of efficient and cost-effective catalysts for water splitting. Researchers have explored catalysts based on abundant and inexpensive materials such as nickel, iron, and cobalt, which have demonstrated improved performance and stability. These catalysts show promise for large-scale implementation and offer potential for reducing the reliance on expensive and scarce materials. Another avenue of research involves photoelectrochemical (PEC) cells, which utilize solar energy to drive the water-splitting reaction. Scientists have been working on designing novel materials, including metal oxides and semiconductors, to enhance light absorption and charge separation properties. These advancements in PEC technology aim to maximize the conversion of sunlight into chemical energy. Inspired by natural photosynthesis, artificial photosynthesis approaches have also gained traction. By integrating light-absorbing materials, catalysts, and membranes, these systems aim to mimic the complex processes of natural photosynthesis and produce hydrogen fuel from water. The development of efficient and stable artificial photosynthesis systems holds promise for sustainable and clean energy production. Tandem cells, which combine multiple light-absorbing materials with different bandgaps, have emerged as a strategy to enhance the efficiency of water-splitting systems. By capturing a broader range of the solar spectrum, tandem cells optimize light absorption and improve overall system performance. Lastly, advancements in electrocatalysis have played a critical role in water splitting. Researchers have focused on developing advanced electrocatalysts with high activity, selectivity, and stability for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). These electrocatalysts contribute to overall water-splitting efficiency and pave the way for practical implementation.

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Synthesis, structural, optical, and dielectric properties of CuWO4/PVP/Cs bio-nanocomposites for some industrial applications

El Sayed,

Abdel Maksoud,

Kassem

et al. 2023

J Mater Sci: Mater Electron

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The nanocomposites of biopolymers and bimetallic oxides are exciting classes of materials. Besides the economic and environmental considerations, these materials became the best candidates for various applications in industry and medicine. In this study, CuWO4 nanoparticles (NP) with high purity were prepared by co-precipitation and loaded into poly(vinyl pyrrolidone)/chitosan (PVP/Cs) films. XRD results showed that CuWO4 has a triclinic phase with an average crystallite size of 43 nm. PVP/Cs is semi-crystalline blend and its crystallinity degraded by CuWO4 incorporation. EDX analysis was used to study the chemical composition of all samples. FE-SEM showed that CuWO4 has particle sizes of 50–150 nm and that the crack-free surface of PVP/Cs became rougher and more porous after loading of CuWO4 NP. FTIR confirmed the presence of the reactive functional group of CuWO4, PVP, and Cs and that the low doping ratio of CuWO4 NP restricted the functional group’s vibrations. The UV–vis–NIR investigation showed that the films have a small absorption index and high transmittance in the range of 68–90%. The direct and indirect band gaps ($${E}_{g}^{dir}$$ E g dir and $${E}_{g}^{ind}$$ E g ind ) of the blend were found equal to 5.0 and 4.2 eV and can be tuned by CuWO4 content. Similarly, the index of refraction and carrier concentration/electron effective mass ratio (N/m*), the dielectric constant (ε′ = 8.3–24.5), and the dielectric loss depend on the applied frequency, temperature, and CuWO4 filler content. The conductivity (σac) ranges from 1.2 × 10–6 to 9.16 × 10–4 S/m and exhibits the Arrhenius behavior. The optical and dielectric results show that the prepared PNC may suit some energy storage device,s such as supercapacitors, and organic optoelectronic devices, such as light emitting diodes and/or photovoltaic solar cells.

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Bulk and surface modified polycrystalline CuWO4 films for photoelectrochemical water oxidation

Cited by 8 publications

References 49 publications

Emergent CuWO4 Photoanodes for Solar Fuel Production: Recent Progress and Perspectives

Emergent CuWO4 Photoanodes for Solar Fuel Production: Recent Progress and Perspectives

Advancements in water splitting for sustainable energy generation: A review

Synthesis, structural, optical, and dielectric properties of CuWO4/PVP/Cs bio-nanocomposites for some industrial applications

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