Investigation on the highly active SrTiO3 photocatalyst toward overall H2O splitting by doping Na ion

Jiang, Junzhe; Kato, Koji; Fujimori, Hirotaka; Yamakata, Akira; Sakata, Yoshihisa

doi:10.1016/j.jcat.2020.07.025

Cited by 59 publications

(28 citation statements)

References 49 publications

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“…Among them, SrTiO 3 is one of the promising materials with a bandgap of approximately 3.2 eV that can split water under UV illumination and has been widely studied 5,6 . Many researchers focus on doping aliovalent metal cations into SrTiO 3 to control the defect structure and improve photocatalytic reactivity 7,8 . In recent studies, it was found that a flux treatment in SrCl 2 —together with Al doping—can significantly increase the reactivity of SrTiO 3 for water splitting 9–11 .…”

Section: Introductionmentioning

confidence: 99%

“…5,6 Many researchers focus on doping aliovalent metal cations into SrTiO 3 to control the defect structure and improve photocatalytic reactivity. 7,8 In recent studies, it was found that a flux treatment in SrCl 2 -together with Al doping-can significantly increase the reactivity of SrTiO 3 for water splitting. [9][10][11] Previous experiments have shown that modifying the band bending in the space charge region either by internal or external electric fields influences the photochemical reactivity.…”

Section: Introductionmentioning

confidence: 99%

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Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

2022

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Photocatalytic hydrogen production rates have been measured from Al‐doped SrTiO3 with a range of controlled shapes and sizes using a high‐throughput parallelized and automated photochemical reactor. It is found that the photocatalytic reactivity is influenced by crystal shape and that crystals with a {1 1 0} to {1 0 0} surface area ratio between 1.3 and 1.8 yield more H2 than crystals with other ratios. Crystals with a {1 1 0}/{1 0 0} surface area ratio of 1.8 generate hydrogen at 550 μmol h−1 g−1 at pH 7, whereas crystals with only {1 0 0} facets exposed generate hydrogen at 300 μmol h−1 g−1 under the same condition. It is likely that the surface area ratio provides the appropriate balance between the photoanodic reaction on the {1 1 0} surface and the photocathodic reaction on the {1 0 0} surface. In the size range of 250–450 nm, larger crystals produce hydrogen at a rate of 400 μmol h−1 g−1 at pH 7, whereas smaller crystals only produce 200 μmol h−1 g−1, suggesting that the larger crystals reduce the rate of electron–hole recombination or back reaction and that the widths of the space charges within the crystal are comparable to the particle radius.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

2022

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“…The SrTiO 3 particles were doped with Al cations in this study to enhance water-splitting efficiency by limiting electron-hole recombination. Transient absorption studies 40,41 showed recombination rate in In addition, the hypothesized hole-induced vacancy creation is a side-reaction that is problematic for photocatalyst durability. Durability of the Al-doped SrTiO 3 photocatalyst was enhanced over a span of 1300 h under simulated sunlight irradiation by loading the CoO y cocatalyst.…”

Section: Resultsmentioning

confidence: 99%

Microelectrode-based transient amperometry of O₂adsorption and desorption on a SrTiO₃photocatalyst excited under water

Kosaka

Ando

Hisatomi

et al. 2021

Phys. Chem. Chem. Phys.

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“…Furthermore, it is possible to combine properties, such as ferroelectricity or piezoelectricity, with the photocatalytic effect to improve photocatalytic activity. The perovskite photocatalysts can be classified into the following categories: titanates, SrTiO 3 [112][113][114][115][116][117][118] and BaTiO 3 119-123…”

Section: Perovskite-based Photocatalystsmentioning

confidence: 99%

Advances in Z‐scheme semiconductor photocatalysts for the photoelectrochemical applications: A review

et al. 2022

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Investigation on the highly active SrTiO3 photocatalyst toward overall H2O splitting by doping Na ion

Cited by 59 publications

References 49 publications

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

Microelectrode-based transient amperometry of O₂adsorption and desorption on a SrTiO₃photocatalyst excited under water

Advances in Z‐scheme semiconductor photocatalysts for the photoelectrochemical applications: A review

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Investigation on the highly active SrTiO3 photocatalyst toward overall H2O splitting by doping Na ion

Cited by 59 publications

References 49 publications

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO3 photocatalysts

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO3 photocatalysts

Microelectrode-based transient amperometry of O2adsorption and desorption on a SrTiO3photocatalyst excited under water

Advances in Z‐scheme semiconductor photocatalysts for the photoelectrochemical applications: A review

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Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

Influence of particle size and shape on the rate of hydrogen produced by Al‐doped SrTiO₃ photocatalysts

Microelectrode-based transient amperometry of O₂adsorption and desorption on a SrTiO₃photocatalyst excited under water