Modified Ta3N5 Powder as a Photocatalyst for O2 Evolution in a Two-Step Water Splitting System with an Iodate/Iodide Shuttle Redox Mediator under Visible Light

Tabata, Masaji; Maeda, Kazuhiko; Higashi, Masanobu; Lu, Daling; Takata, Tsuyoshi; Abe, Ryu; Domen, Kazunari

doi:10.1021/la100722w

Cited by 189 publications

(147 citation statements)

References 20 publications

(23 reference statements)

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“…However, loading RuO 2 on the TaON surface enables water oxidation even in the presence of I – 4, 22, 23. IrO 2 ‐loaded Ta 3 N 5 or Pt‐BaTaO 2 N is another interesting example that allows water oxidation in the presence of IO 3 – /I – , respectively 24, 25. The choice of the reaction pH plays a key role in effectively improving the efficiency of the Z‐scheme system 4, 17, 18.…”

Section: Z‐scheme Systems With Shuttle Redox Mediatorsmentioning

confidence: 99%

“…Many works studied different connection modes of Z‐scheme photocatalytic systems 13, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, …”

Section: Introductionmentioning

confidence: 99%

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Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

et al. 2016

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Semiconductor photocatalysts have attracted increased attention due to their great potential for solving energy and environmental problems. The formation of Z‐scheme photocatalytic systems that mimic natural photosynthesis is a promising strategy to improve photocatalytic activity that is superior to single component photocatalysts. The connection between photosystem I (PS I) and photosystem II (PS II) are crucial for constructing efficient Z‐scheme photocatalytic systems using two photocatalysts (PS I and PS II). The present review concisely summarizes and highlights recent state‐of‐the‐art accomplishments of Z‐scheme photocatalytic systems with diverse connection modes, including i) with shuttle redox mediators, ii) without electron mediators, and iii) with solid‐state electron mediators, which effectively increase visible‐light absorption, promote the separation and transportation of photoinduced charge carriers, and thus enhance the photocatalytic efficiency. The challenges and prospects for future development of Z‐scheme photocatalytic systems are also presented.

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Section: Z‐scheme Systems With Shuttle Redox Mediatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

et al. 2016

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“…The energy bands of Ta 3 N 5 straddle the water redox potentials 19 21)), having a conduction band too positive for H 2 evolution. Ta 3 N 5 has been widely used for both photocatalytic and PEC water splitting [22][23][24][25][26][27][28] . Various attempts have been made to increase the activity of Ta 3 N 5 by doping with foreign elements, mostly with group IA alkali metals [29][30][31] .…”

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confidence: 99%

Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency

et al. 2013

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Spurred by the decreased availability of fossil fuels and global warming, the idea of converting solar energy into clean fuels has been widely recognized. Hydrogen produced by photoelectrochemical water splitting using sunlight could provide a carbon dioxide lean fuel as an alternative to fossil fuels. A major challenge in photoelectrochemical water splitting is to develop an efficient photoanode that can stably oxidize water into oxygen. Here we report an efficient and stable photoanode that couples an active barium-doped tantalum nitride nanostructure with a stable cobalt phosphate co-catalyst. The effect of barium doping on the photoelectrochemical activity of the photoanode is investigated. The photoanode yields a maximum solar energy conversion efficiency of 1.5%, which is more than three times higher than that of state-of-the-art single-photon photoanodes. Further, stoichiometric oxygen and hydrogen are stably produced on the photoanode and the counter electrode with Faraday efficiency of almost unity for 100 min.

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“…Hence a useful system without any disadvantages has yet to be developed (Sayama et al 2001;Kato et al 2004;Abe et al 2005;Higashi et al 2008;Sasaki et al 2009;Abe et al 2009;Maeda et al 2010;Tabata et al 2010). (Sayama et al 2001;Sayama et al 2002;Abe et al 2001 (Erbs et al 1984;Kato et al 2004).…”

Section: Z-scheme Photocatalystsmentioning

confidence: 99%

Photocatalytic Splitting of Water

Skillen

McCullagh

Adams

2014

Environmental Photochemistry Part III

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The final publication is available at Springer via http://dx.doi.org/10.1007/698_2014_261 AbstractThe use of photocatalysis for the photosplitting of water to generate hydrogen and oxygen has gained interest as a method for the conversion and storage of solar energy. The application of photocatalysis through catalyst engineering, mechanistic studies and photoreactor development has highlighted the potential of this technology, with the number of publications significantly increasing in the past few decades. In 1972 Fujishima and Honda described a photoelectrochemcial system capable of generating H 2 and O 2 using thin film TiO 2 . Since this publication, a diverse range of catalysts and platforms have been deployed, along with a varying range of photoreactors coupled with photoelectrochemical and photovoltaic technology. This chapter aims to provide a comprehensive overview of photocatalytic technology applied to overall H 2 O splitting. An insight into the electronic and geometric structure of catalysts is given based upon the one and two step photocatalyst systems.One step photocatalysts are discussed based upon their d 0 and d 10 electron configuration and core metal ion including transition metal oxides, typical metal oxides and metal nitrides. The two step approach, referred to as the Z-scheme, is discussed as an alternative approach to the traditional one step mechanism and the potential of the system utilise visible and solar irradiation. In addition to this the mechanistic procedure of H 2 O splitting is reviewed to provide the reader with a detailed understanding of the process. Finally, the development of photoreactors and reactor properties are discussed with a view towards the photoelectrochemical splitting of H 2 O.

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Modified Ta₃N₅ Powder as a Photocatalyst for O₂ Evolution in a Two-Step Water Splitting System with an Iodate/Iodide Shuttle Redox Mediator under Visible Light

Cited by 189 publications

References 20 publications

Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency

Photocatalytic Splitting of Water

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