Photoelectrochemical Water Oxidation with Photosystem II Integrated in a Mesoporous Indium–Tin Oxide Electrode

Kato, Masaru; Cardona, Tanai; Rutherford, A. William; Reisner, Erwin

doi:10.1021/ja301488d

Cited by 204 publications

(211 citation statements)

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“…Recently, Reisner and colleagues reported a hybrid photoanode consisting of T. elongatus PSII particles deposited on a high surface area mesoporous ITO electrode [90]. The particular three-dimensional architecture of this material permits favorable high protein coverage and direct electron transfer from PSII to the mesoporous ITO surface.…”

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confidence: 99%

“…The particular three-dimensional architecture of this material permits favorable high protein coverage and direct electron transfer from PSII to the mesoporous ITO surface. The authors reported the TOF of water oxidation of 0.18 ±0.04 mol O 2 /mol PSII/s and a current density of 1.6 ±0.3 μA/cm 2 [90]. Moreover, the study demonstrated great enhancement in photocurrent density upon addition of two external electron mediators, potassium 1,4-naphthoquinone-2-sulfonate (NQS) and 2,6-dichloro-1,4-benzoquinone (DCBQ), indicating somewhat non-favorable interfacing of PSII with ITO which has to be overcome by the addition of external electron transfer mediators.…”

Section: +mentioning

confidence: 99%

“…Moreover, the study demonstrated great enhancement in photocurrent density upon addition of two external electron mediators, potassium 1,4-naphthoquinone-2-sulfonate (NQS) and 2,6-dichloro-1,4-benzoquinone (DCBQ), indicating somewhat non-favorable interfacing of PSII with ITO which has to be overcome by the addition of external electron transfer mediators. Furthermore, mechanistic studies show electron transfer from the terminal quinone Q A in addition to the terminal quinone Q B to the ITO surface [90], something that does not occur in vivo as only Q B is involved in electron relay in the thylakoid membrane.…”

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confidence: 99%

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Oxygenic photosynthesis: translation to solar fuel technologies

Olmos

Kargul

2014

Acta Soc Bot Pol

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Mitigation of man-made climate change, rapid depletion of readily available fossil fuel reserves and facing the growing energy demand that faces mankind in the near future drive the rapid development of economically viable, renewable energy production technologies. It is very likely that greenhouse gas emissions will lead to the significant climate change over the next fifty years. World energy consumption has doubled over the last twenty-five years, and is expected to double again in the next quarter of the 21st century. Our biosphere is at the verge of a severe energy crisis that can no longer be overlooked. Solar radiation represents the most abundant source of clean, renewable energy that is readily available for conversion to solar fuels. Developing clean technologies that utilize practically inexhaustible solar energy that reaches our planet and convert it into the high energy density solar fuels provides an attractive solution to resolving the global energy crisis that mankind faces in the not too distant future. Nature's oxygenic photosynthesis is the most fundamental process that has sustained life on Earth for more than 3.5 billion years through conversion of solar energy into energy of chemical bonds captured in biomass, food and fossil fuels. It is this process that has led to evolution of various forms of life as we know them today. Recent advances in imitating the natural process of photosynthesis by developing biohybrid and synthetic "artificial leaves" capable of solar energy conversion into clean fuels and other high value products, as well as advances in the mechanistic and structural aspects of the natural solar energy converters, photosystem I and photosystem II, allow to address the main challenges: how to maximize solar-to-fuel conversion efficiency, and most importantly: how to store the energy efficiently and use it without significant losses. Last but not least, the question of how to make the process of solar energy conversion into fuel not only efficient but also cost effective, therefore attractive to the consumer, should be properly addressed.

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confidence: 99%

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

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Oxygenic photosynthesis: translation to solar fuel technologies

Olmos

Kargul

2014

Acta Soc Bot Pol

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“…[13][14][15][16] Moreover, ITO films and ITO/TiO 2 core-shell structures have been utilized as photoanodes in both dye-sensitized solar cells (DSCs) and water oxidation devices. [17][18][19][20] A recent spectroscopic investigation into the charge transfer dynamics of dye-coated ITO films revealed that ITO can both accept and donate electrons during photoinduced charge transfer. 21,22 By exploiting the ambivalent property of this degenerate n-type semiconductor, we have developed an efficient p-type DSC (p-DSC) based on sintered films of ITO nanoparticles.…”

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Indium tin oxide as a semiconductor material in efficient p-type dye-sensitized solar cells

Perera

Daeneke

et al. 2016

NPG Asia Mater

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Indium tin oxide (ITO) is a well-known n-type degenerate semiconductor with a wide variety of electronic and optoelectronic applications. Herein ITO is utilized as a photocathode material in p-type dye-sensitized solar cells in place of the commonly applied and highly colored nickel oxide (NiO) semiconductor. The application of mesoporous ITO photocathodes, [Fe(acac) 3 ] 0/ − as a redox mediator and a new organic dye afforded an impressive energy conversion efficiency of 1.96 ± 0.12%. Comparative transient absorption spectroscopic studies indicated that the recombination rate at the ITO-electrolyte interface is two orders of magnitude faster than that of NiO. Analysis of the operation mechanism of the ITO-based devices with ultraviolet photon spectroscopy and photoelectron spectroscopy in air showed that ITO exhibits a significant local density of states arising below − 4.8 eV, which enables electron transfer to occur from the ITO to the excited dye, thus giving rise to the sustained photocathodic current. NPG Asia Materials (2016) 8, e305; doi:10.1038/am.2016.89; published online 9 September 2016 INTRODUCTION Transparent conducting oxides have been extensively used in optoelectronic applications. 1-3 One common transparent conducting oxide is indium tin oxide (ITO). ITO is a well-known n-type degenerate semiconductor 4 with an optical band gap of 3.5-4.3 eV 5 and has a high transmission in the near infrared and visible regions of the electromagnetic spectrum. Owing to their high optical transparency, good electrical conductivity, chemical inertness, hardness and excellent substrate adherence, 6-8 ITO thin films are applied in flat panel displays, antistatic coatings, solar cells, camera lenses and architectural glazing. 9-12 Additionally, high-surface-area mesoporous ITO films have been used as sensors for gases, such as ammonia, nitric oxide, ethanol and methanol. [13][14][15][16] Moreover, ITO films and ITO/TiO 2 core-shell structures have been utilized as photoanodes in both dye-sensitized solar cells (DSCs) and water oxidation devices. [17][18][19][20] A recent spectroscopic investigation into the charge transfer dynamics of dye-coated ITO films revealed that ITO can both accept and donate electrons during photoinduced charge transfer. 21,22 By exploiting the ambivalent property of this degenerate n-type semiconductor, we have developed an efficient p-type DSC (p-DSC)

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“…168 The SrTiO 3 system at pH 7.0 was reported to be the most efficient with approximately stoichiometric gas evolution, >3700 turnovers per PSII, and an activity of B2500 mol H 2 (mol PSII) À1 h À1 , which corresponds to B80 mmol H 2 h À1 , when assuming 35 chlorophyll per PSII. 169 Cobalt-based redox shuttles. Historically, efficient dye-sensitized solar cells use iodine-based redox electrolytes in nitrile solvents to mediate charge transport from metal-oxide nanoparticles, because recombination from the metal-oxide nanoparticles is much slower than with most other redox shuttles.…”

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confidence: 99%