Current trending and beyond for solar-driven water splitting reaction on WO3 photoanodes

Costa, Magno Barcelos; Araújo, Moisés A. de; Tinoco, Marcos Vinicius de Lima; Brito, Juliana Ferreira de; Mascaro, Lúcia H.

doi:10.1016/j.jechem.2022.06.003

Cited by 65 publications

(23 citation statements)

References 169 publications

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“…K B is the Boltzmann constant (1.38 × 10 −23 J/K), and T is the temperature (K). Electrochemical impedance spectra (EIS) were tested in the frequency range 0.01 Hz−100 kHz and a bias voltage of 0.65 V. The incident photon conversion efficiency (IPCE) of the sample was calculated using the following equation to measure the efficiency of the sample in converting photons to photocurrent at a single wavelength: 40 = J P IPCE 1240 / light (6) where J and λ are the photocurrent density (μA/cm 2 ) and the wavelength of monochromatic light (nm), respectively, and P light is the intensity of incident monochromatic light (mW/ cm 2 ).…”

Section: Pyroelectrochemical and Photoelectrochemical Measurementsmentioning

confidence: 99%

“…Therefore, the use of solar energy to produce hydrogen is promising as a new energy source to replace traditional fossil, and it is considered to be a reliable solution to the above problems. Since Honda and Fujishima discovered that TiO 2 can be used for PEC water splitting in 1972, a large number of semiconductor materials that can be used for solar hydrogen production have been widely studied, such as WO 3 , − TiO 2 , − Fe 2 O 3 , , and BiVO 4 − have become hot spots for research. However, there are many limitations in practical applications, the low carrier separation efficiency and high carrier compounding during migration to the surface are the biggest problems affecting the photocatalytic efficiency .…”

Section: Introductionmentioning

confidence: 99%

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Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

Ruan

Guo

et al. 2023

J. Phys. Chem. C

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Pyroelectric polarization is considered to be one of the effective ways to promote carrier separation and improve the capacity of PEC water splitting. In this paper, we prepared a BiOIO 3 catalyst by a one-pot hydrothermal method and investigated the growth process of BiOIO 3 , based on which HNO 3 and NaOH were used to cause BiOIO 3 to grow selectively along the (040) direction, and the regulation mechanism was analyzed so as to improve the pyroelectric polarization intensity of BiOIO 3 . Under the dual excitation of light and cold−hot cycles, the optimal thickness range of BiOIO 3 nanoplate (40−50 nm) exhibits the highest photocurrent density of 0.134 μA/cm 2 at 1.23 V compared with the reversible hydrogen electrode (RHE), which is 1.6 times higher than that of the nanosheet with a thickness of 20−30 nm. A series of experimental results show that the high performance is due to suitable thickness modulation which not only enhances the polarization intensity and thus reduces the chemical reaction barrier but also facilitates the charge separation and transfer. This study provides a different way of thinking for the development of the field of pyro-photo-electric catalysis on the basis of enhanced pyroelectric polarization.

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Section: Pyroelectrochemical and Photoelectrochemical Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

Ruan

Guo

et al. 2023

J. Phys. Chem. C

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“…There are three main solar-powered water splitting methods: photovoltaic electrolysis, 7,8 photoelectrocatalysis 7,9–13 and photocatalysis. 14–16 Among these, photocatalytic water splitting has attracted considerable interest in recent years because it is one of the most promising technologies for the production of hydrogen energy on a large scale and at low cost.…”

Section: Introductionmentioning

confidence: 99%

A perspective on two pathways of photocatalytic water splitting and their practical application systems

Lin

Takata

et al. 2023

Phys. Chem. Chem. Phys.

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“…As the consumption of traditional fossil energy grows continuously, it is increasingly significant to find alternative solutions to the sustainable development of both economy and society. − As one of the most anticipated energy sources, hydrogen enables the photoelectrochemical (PEC) water splitting based on semiconductor photoelectrodes, which is a research hotspot currently. − However, the practical application of this technology is still constrained by the excessive low solar-to-hydrogen efficiency. , …”

Section: Introductionmentioning

confidence: 99%

Exploring the Effects of Crystal Facet Orientation at the Heterojunction Interface on Charge Separation for Photoanodes

Liu

Zuo

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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As one of the most effective strategies to promote the spatial separation of charges, constructing heterojunction has received extensive attention in recent years. However, it remains unclear whether the crystal facet orientation (CFO) at the heterojunction interface is contributory to charge separation. Herein, three types of TiO2/CdS heterojunction films with different CFOs at the heterojunction interface were produced by adjusting the CdS CFO through in situ conversion. Among them, the TiO2/CdS film with a mixed CdS CFO showed the maximum photocurrent density and charge separation efficiency. In contrast, the TiO2/CdS film with a uniform CdS (100) (CdS-100) performed worst. According to the results of experimentation and DFT calculation, these three types of TiO2/CdS films varied significantly in electron transport time. This is attributable to the different Fermi levels of CdS CFO and the formation of different built-in electric fields upon coupling with TiO2. The rise in the Fermi level of CdS can increase the driving force required for charge migration at the heterojunction interface. Additionally, a stronger built-in electric field is conducive to charge separation. To sum up, these results highlight the significant impact of CFO at the heterojunction interface on charge separation.

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Current trending and beyond for solar-driven water splitting reaction on WO3 photoanodes

Cited by 65 publications

References 169 publications

Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

A perspective on two pathways of photocatalytic water splitting and their practical application systems

Exploring the Effects of Crystal Facet Orientation at the Heterojunction Interface on Charge Separation for Photoanodes

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Current trending and beyond for solar-driven water splitting reaction on WO3 photoanodes

Cited by 65 publications

References 169 publications

Thickness Control of BiOIO3 Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

Thickness Control of BiOIO3 Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

A perspective on two pathways of photocatalytic water splitting and their practical application systems

Exploring the Effects of Crystal Facet Orientation at the Heterojunction Interface on Charge Separation for Photoanodes

Contact Info

Product

Resources

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Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance

Thickness Control of BiOIO₃ Enables Polarization Enhancement To Promote Carrier Separation and Pyro-PEC Performance