Solar-driven Z-scheme water splitting using tantalum/nitrogen co-doped rutile titania nanorod as an oxygen evolution photocatalyst

Nakada, Akinobu; Nishioka, Shunta; Vequizo, Junie Jhon M.; Muraoka, Kanemichi; Kanazawa, Toru; Yamakata, Akira; Nozawa, Shiro; Kumagai, Hiromu; Adachi, Shin‐ichi; Ishitani, Osamu; Maeda, Kazuhiko

doi:10.1039/c6ta10541f

Cited by 105 publications

(102 citation statements)

References 49 publications

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“…Ap owder form of TiO 2 :Ta/N as ap hotocatalyst for visiblelight water oxidation was reported by Maeda et al [86] TiO 2 :Ta/N nanorods were prepared by nitridation of an oxide precursor (TiO 2 :Ta) that had been synthesized by am icrowave-assisted solvothermala pproach. The production of TiO 2 :Ta/N (1.0 mol % Ta and < 0.1 wt %N )w ithasingle-phase rutile structure was confirmed by X-ray diffractiona nd elemental analyses.…”

Section: Anion Dopingmentioning

confidence: 90%

Water Splitting on Rutile TiO₂‐Based Photocatalysts

Miyoshi

Nishioka

Maeda

2018

Chemistry A European J

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165

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Water splitting using a semiconductor photocatalyst with sunlight has long been viewed as a potential means of large-scale H production from renewable resources. Different from anatase TiO , rutile enables preferential water oxidation, which is useful for the construction of a Z-scheme water-splitting system. The combination of rutile TiO with a suitable H -evolution photocatalyst such as a Pt-loaded BaZrO -BaTaO N solid solution enables solar-driven water splitting into H and O . While rutile TiO is a wide-gap semiconductor with a bandgap of 3.0 eV, co-doping of rutile TiO with certain metal ions and/or nitrogen produces visible-light-driven photocatalysts, which are also useful as a component for water oxidation in visible-light-driven Z-scheme water splitting. The key to achieving highly efficient water oxidation is to maintain a charge balance of dopants in the rutile, because single doping typically produces trap states that capture photogenerated electrons and/or holes. Here we provide a concise summary of rutile TiO -based photocatalysts for water-splitting systems.

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Section: Anion Dopingmentioning

confidence: 90%

Water Splitting on Rutile TiO₂‐Based Photocatalysts

Miyoshi

Nishioka

Maeda

2018

Chemistry A European J

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165

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“…However, the extend of function for TiO 2 is greatly limited by its wide bandgap in various polymorphs, i.e., rutile (3.0 eV) and anatase (3.2 eV) 51. In a recent work by Nakada et al, Ta and N atoms have been successful doped interstitially into the framework of rutile TiO 2 , forming titania with a narrow bandgap of 2.3 eV 52. As depicted in Figure a, the intrusion of foreign atoms will induce an absorption tail in UV–vis under the visible region ascribed to the band trailing effect.…”

Section: Current Status Of Z‐scheme Systems For Water Splittingmentioning

confidence: 99%

Section: Current Status Of Z‐scheme Systems For Water Splittingmentioning

confidence: 99%

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

et al. 2020

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As the world decides on the next giant step for the renewable energy revolution, scientists have begun to reinforce their headlong dives into the exploitation of solar energy. Hitherto, numerous attempts are made to imitate the natural photosynthesis of plants by converting solar energy into chemical fuels which resembles the “Z‐scheme” process. A recreation of this system is witnessed in artificial Z‐scheme photocatalytic water splitting to generate hydrogen (H2). This work outlines the recent significant implication of the Z‐scheme system in photocatalytic water splitting, particularly in the role of electron mediator and the key factors that improve the photocatalytic performance. The Review begins with the fundamental rationales in Z‐scheme water splitting, followed by a survey on the development roadmap of three different generations of Z‐scheme system: 1) PS‐A/D‐PS (first generation), 2) PS‐C‐PS (second generation), and 3) PS‐PS (third generation). Focus is also placed on the scaling up of the “leaf‐to‐tree” challenge of Z‐scheme water splitting system, which is also known as Z‐scheme photocatalyst sheet. A detailed investigation of the Z‐scheme system for achieving H2 evolution from past to present accompanied with in‐depth discussion on the key challenges in the area of Z‐scheme photocatalytic water splitting are provided.

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“…Recently, we have developed tantalum and nitrogen codoped rutile TiO 2 (TiO 2 :Ta/N) powder, which can utilize visible light up to 540 nm and efficiently works as a water oxidation photocatalyst in the Z‐schematic water splitting with Ru‐loaded SrTiO 3 :Rh under visible‐light irradiation . Importantly, the performance of Z‐scheme water splitting with TiO 2 :Ta/N was higher than that obtained with an oxynitride TaON, which is known to be one of the most active oxynitride photocatalysts for visible‐light water oxidation …”

Section: Introductionmentioning

confidence: 99%

Solar Water Oxidation by a Visible‐Light‐Responsive Tantalum/Nitrogen‐Codoped Rutile Titania Anode for Photoelectrochemical Water Splitting and Carbon Dioxide Fixation

et al. 2018

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Non‐oxide materials such as oxynitrides are good candidates as photoanodes for visible‐light‐driven water oxidation, but most of them suffer from oxidative degradation by photogenerated holes, resulting in low stability. Herein we developed a photoanode using a visible‐light‐responsive TiO2 powder doped with tantalum and nitrogen (TiO2:Ta/N) for water oxidation. The Ta/N codoping enabled a stable anodic photocurrent response attributable to water oxidation under visible‐light irradiation. Surface modification of the TiO2:Ta/N anode with RuOx species further facilitated water oxidation catalysis, achieving stable O2 evolution over 5 h of operation with no sign of deactivation. Operando XAFS measurements revealed an important function of the RuOx species as a collector of photogenerated holes in TiO2:Ta/N, facilitating the photoelectrochemical water oxidation. Visible‐light‐driven H2 evolution and solar‐driven CO2 reduction into CO were both achieved by using water as an electron donor in photoelectrochemical cells with the TiO2:Ta/N photoanode coupled to a Pt cathode and a Ru(II)–Re(I) binuclear complex photocathode, respectively.

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Solar-driven Z-scheme water splitting using tantalum/nitrogen co-doped rutile titania nanorod as an oxygen evolution photocatalyst

Abstract: Tantalum and nitrogen co-doped rutile TiO2 nanorods were developed as a visible-light-active water oxidation photocatalyst for solar-driven Z-scheme water splitting.

Cited by 105 publications

References 49 publications

Water Splitting on Rutile TiO₂‐Based Photocatalysts

Water Splitting on Rutile TiO₂‐Based Photocatalysts

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

Solar Water Oxidation by a Visible‐Light‐Responsive Tantalum/Nitrogen‐Codoped Rutile Titania Anode for Photoelectrochemical Water Splitting and Carbon Dioxide Fixation

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Solar-driven Z-scheme water splitting using tantalum/nitrogen co-doped rutile titania nanorod as an oxygen evolution photocatalyst

Abstract: Tantalum and nitrogen co-doped rutile TiO2 nanorods were developed as a visible-light-active water oxidation photocatalyst for solar-driven Z-scheme water splitting.

Cited by 105 publications

References 49 publications

Water Splitting on Rutile TiO2‐Based Photocatalysts

Water Splitting on Rutile TiO2‐Based Photocatalysts

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

Solar Water Oxidation by a Visible‐Light‐Responsive Tantalum/Nitrogen‐Codoped Rutile Titania Anode for Photoelectrochemical Water Splitting and Carbon Dioxide Fixation

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Water Splitting on Rutile TiO₂‐Based Photocatalysts

Water Splitting on Rutile TiO₂‐Based Photocatalysts