Efficient photocatalytic oxygen evolution using BaTaO<sub>2</sub>N obtained from nitridation of perovskite-type oxide

Jadhav, Shraddha; Hasegawa, Shuta; Hisatomi, Takashi; Zheng, Wanhua; Seo, Jeongsuk; Higashi, Tomohiro; Katayama, Masao; Minegishi, Tsutomu; Takata, Tsuyoshi; Peralta‐Hernández, Juan M.; Torres, Oracio Serrano; Domen, Kazunari

doi:10.1039/c9ta10684g

Cited by 35 publications

(28 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considerably enhanced O 2 evolution activity of 699 µmol h −1 and high apparent quantum efficiency (AQE) of 11.9% at 420 nm are obtained, which are also ascribed to the matching of the crystal structure of the precursor oxide ((Na 1/4 Ba 3/4 )(Zn 1/4 Ta 3/4 )O 3 ) and the resultant nitridation product (BTON). [ 35 ] The KCl‐assisted molten salt method has also been used to prepare BTON with anisotropic facets of (100) and (110) (crystal facet regulations). The electrons and holes preferentially migrate to the (100) and (110) facets, respectively, facilitating spatial charge separation.…”

Section: Bulk Structural Regulation Of the Nanophotocatalystmentioning

confidence: 99%

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Dong

Cui

et al. 2021

Advanced Materials

View full text Add to dashboard Cite

(Oxy)nitride‐based nanophotocatalysts have been extensively investigated for solar‐to‐chemical conversion, and not only allow wide spectral utilization to achieve high theoretical energy conversion efficiency but also exhibit suitable conduction and valence band positions for robust reduction and oxidation of water. During the past decades, a few reviews on the research progress in designing and synthesizing new visible‐light‐responsive semiconductors for various applications in solar‐to‐chemical conversion have been published. However, those on the effects of their bulk and composite (surface/interface) nanostructures on basic processes as well as solar water splitting performances to produce hydrogen are still limited. In this review, a brief introduction on the relationship between the nanostructure photocatalytic properties is included. Three main processes of solar water splitting are involved, allowing the elucidation of the correlation with the nanostructural properties of the photocatalyst such as surface/interface, size, morphology, and bulk structure. Subsequently, the development of methodologies and strategies for modulating the bulk and composite structures to improve the efficiencies of the basic processes, particularly charge separation, is summarized in detail. Finally, the prospects of (oxy)nitride‐based photocatalysts such as controlled synthesis, modulation of 1D/2D morphology, exposed facet regulation, heterostructure formation, theoretical simulation, and time‐ and space‐resolved spectroscopy are discussed.

show abstract

Section: Bulk Structural Regulation Of the Nanophotocatalystmentioning

confidence: 99%

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Dong

Cui

et al. 2021

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Perovskite-type BaTaO 2 N with a bandgap of around 1.8 eV is a photocatalyst material that has been intensively studied for Z-scheme water splitting 15,16,22,23 , as well as H 2 or O 2 evolution half-reactions using sacrificial reagents 15,[24][25][26][27] (see Supplementary Table 2). The BaTaO 2 N photocatalyst intrinsically exhibits a weak driving force for surface redox reactions 14 , and loading of cocatalysts such as nanoparticulate Pt is essential to promote the extraction of photogenerated charge carriers from BaTaO 2 N for efficient H 2 evolution 22,23,[28][29][30][31][32][33] .…”

mentioning

confidence: 99%

Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

et al. 2021

Self Cite

View full text Add to dashboard Cite

Oxynitride photocatalysts hold promise for renewable solar hydrogen production via water splitting owing to their intense visible light absorption. Cocatalyst loading is essential for activation of such oxynitride photocatalysts. However, cocatalyst nanoparticles form aggregates and exhibit weak interaction with photocatalysts, which prevents eliciting their intrinsic photocatalytic performance. Here, we demonstrate efficient utilization of photoexcited electrons in a single-crystalline particulate BaTaO2N photocatalyst prepared with the assistance of RbCl flux for H2 evolution reactions via sequential decoration of Pt cocatalyst by impregnation-reduction followed by site-selective photodeposition. The Pt-loaded BaTaO2N photocatalyst evolves H2 over 100 times more efficiently than before, with an apparent quantum yield of 6.8% at the wavelength of 420 nm, from a methanol aqueous solution, and a solar-to-hydrogen energy conversion efficiency of 0.24% in Z-scheme water splitting. Enabling uniform dispersion and intimate contact of cocatalyst nanoparticles on single-crystalline narrow-bandgap particulate photocatalysts is a key to efficient solar-to-chemical energy conversion.

show abstract

“…Globally, various research groups engineered the band-gap energy for the development of visible-light absorbing metaldoped oxides- [9][10][11] , (oxy)sulfides- [12][13][14] , (oxy)nitrides- [15][16][17][18] , (oxy) halides- [19][20][21] , and metal chalcogenides-based photocatalysts for overall solar water splitting 22,23 . Recently, Wang et al demonstrated the encouraging potentials of narrow band-gap Y 2 Ti 2 O 5 S 2 photocatalyst, which absorbs large fraction of visible solar spectrum up to 650 nm, and generates a stochiometric durable H 2 and O 2 gas evolution 24 .…”

mentioning

confidence: 99%

Unveiling charge dynamics of visible light absorbing oxysulfide for efficient overall water splitting

et al. 2021

Self Cite

View full text Add to dashboard Cite

Oxysulfide semiconductor, Y2Ti2O5S2, has recently discovered its exciting potential for visible-light-induced overall water splitting, and therefore, imperatively requires the probing of unknown fundamental charge loss pathways to engineer the photoactivity enhancement. Herein, transient diffuse reflectance spectroscopy measurements are coupled with theoretical calculations to unveil the nanosecond to microsecond time range dynamics of the photogenerated charge carriers. In early nanosecond range, the pump-fluence-dependent decay dynamics of the absorption signal is originated from the bimolecular recombination of mobile charge carriers, in contrast, the power-law decay kinetics in late microsecond range is dominated by hole detrapping from exponential tail trap states of valence band. A well-calibrated theoretical model estimates various efficiency limiting material parameters like recombination rate constant, n-type doping density and tail-states parameters. Compared to metal oxides, longer effective carrier lifetime ~6 ns is demonstrated. Different design routes are proposed to realize efficiency beyond 10% for commercial solar-to-hydrogen production from oxysulfide photocatalysts.

show abstract

Efficient photocatalytic oxygen evolution using BaTaO₂N obtained from nitridation of perovskite-type oxide

Abstract: Designing stoichiometric, isostructural precursor oxides opens opportunities for the development of (oxy)nitride photocatalysts.

Cited by 35 publications

References 18 publications

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

Unveiling charge dynamics of visible light absorbing oxysulfide for efficient overall water splitting

Contact Info

Product

Resources

About

Efficient photocatalytic oxygen evolution using BaTaO2N obtained from nitridation of perovskite-type oxide

Abstract: Designing stoichiometric, isostructural precursor oxides opens opportunities for the development of (oxy)nitride photocatalysts.

Cited by 35 publications

References 18 publications

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Nanostructure Engineering and Modulation of (Oxy)Nitrides for Application in Visible‐Light‐Driven Water Splitting

Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

Unveiling charge dynamics of visible light absorbing oxysulfide for efficient overall water splitting

Contact Info

Product

Resources

About

Efficient photocatalytic oxygen evolution using BaTaO₂N obtained from nitridation of perovskite-type oxide