Visible light driven hydrogen production from a photo-active cathode based on a molecular catalyst and organic dye-sensitized p-type nanostructured NiO

Li, Lin; Duan, Lele; Wen, Fan; Li, Can; Wang, Mei; Hagfeldt, Anders; Sun, Licheng

doi:10.1039/c2cc16101j

Cited by 249 publications

(252 citation statements)

References 39 publications

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“…The first demonstration of this approach was reported by Nann et al [106] when they adsorbed a Fe 2 S 2 (CO) 6 , the simplest mimicking equivalent of the [FeFe]-hydrogenase, with a mesoporous p-type InP photoelectrode (figure 10d). Cobaloxime, a bioinspired equivalent of hydrogenases, was also successfully integrated with an organic dyesensitized-NiO or a Ru-dye-sensitized TiO 2 electrode via either non-covalent [113] or covalent grafting [114]. However, these photocathodes showed moderate efficiency; typical photocurrents of only a few microamperes were obtained.…”

Section: Hybrid Photocatalysts For Proton Reduction and Hydrogen Evolmentioning

confidence: 99%

From natural to artificial photosynthesis

Barber

Tran

2013

J. R. Soc. Interface.

328

253

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Demand for energy is projected to increase at least twofold by mid-century relative to the present global consumption because of predicted population and economic growth. This demand could be met, in principle, from fossil energy resources, particularly coal. However, the cumulative nature of carbon dioxide (CO 2 ) emissions demands that stabilizing the atmospheric CO 2 levels to just twice their pre-anthropogenic values by mid-century will be extremely challenging, requiring invention, development and deployment of schemes for carbon-neutral energy production on a scale commensurate with, or larger than, the entire present-day energy supply from all sources combined. Among renewable and exploitable energy resources, nuclear fusion energy or solar energy are by far the largest. However, in both cases, technological breakthroughs are required with nuclear fusion being very difficult, if not impossible on the scale required. On the other hand, 1 h of sunlight falling on our planet is equivalent to all the energy consumed by humans in an entire year. If solar energy is to be a major primary energy source, then it must be stored and despatched on demand to the end user. An especially attractive approach is to store solar energy in the form of chemical bonds as occurs in natural photosynthesis. However, a technology is needed which has a year-round average conversion efficiency significantly higher than currently available by natural photosynthesis so as to reduce land-area requirements and to be independent of food production. Therefore, the scientific challenge is to construct an 'artificial leaf' able to efficiently capture and convert solar energy and then store it in the form of chemical bonds of a high-energy density fuel such as hydrogen while at the same time producing oxygen from water. Realistically, the efficiency target for such a technology must be 10 per cent or better. Here, we review the molecular details of the energy capturing reactions of natural photosynthesis, particularly the water-splitting reaction of photosystem II and the hydrogen-generating reaction of hydrogenases. We then follow on to describe how these two reactions are being mimicked in physico-chemical-based catalytic or electrocatalytic systems with the challenge of creating a large-scale robust and efficient artificial leaf technology.

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Section: Hybrid Photocatalysts For Proton Reduction and Hydrogen Evolmentioning

confidence: 99%

From natural to artificial photosynthesis

Barber

Tran

2013

J. R. Soc. Interface.

328

253

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“…Nevertheless, in all cases, the photocurrents proved very stable with time. We thus decided to compare the aqueous acetate buffer conditions examined here with phosphate buffer conditions more typically used in the literature [27,51,52]. Figure 8 compares the PEC performance of the same electrode recorded first in acetate buffer ( pH 4.5, black trace) and then in phosphate buffer ( pH 7, red trace).…”

Section: Photoelectrochemical Properties Of Dye-sensitized Nio Filmsmentioning

confidence: 99%

Dye-sensitized PS- b -P2VP-templated nickel oxide films for photoelectrochemical applications

et al. 2015

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Moving from homogeneous water-splitting photocatalytic systems to photoelectrochemical devices requires the preparation and evaluation of novel p-type transparent conductive photoelectrode substrates. We report here on the sensitization of polystyrene-block-poly-(2-vinylpyridine) (PS-b-P2VP) diblock copolymer-templated NiO films with an organic push -pull dye. The potential of these new templated NiO film preparations for photoelectrochemical applications is compared with NiO material templated by F108 triblock copolymers. We conclude that NiO films are promising materials for the construction of dye-sensitized photocathodes to be inserted into photoelectrochemical (PEC) cells. However, a combined effort at the interface between materials science and molecular chemistry, ideally funded within a Global Artificial Photosynthesis Project, is still needed to improve the overall performance of the photoelectrodes and progress towards economically viable PEC devices.

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“…One of the most obvious is water splitting. In 2012, Li et al reported the use of their P1 sensitizer on NiO for water reduction to generate H2 gas [202]. This was accomplished with the aid of a cobalt co-catalyst and triethanolamine as a sacrificial electron donor.…”

Section: Sensitized Photocathodes For Water Splittingmentioning

confidence: 99%

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

Nattestad¹,

Perera²,

Spiccia³

2016

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Third generation photovoltaics are based on the concept of providing high conversion efficiencies with low device production costs. As such, second generation concepts, such as Dye-sensitized Solar Cells (DSCs), serve as a good starting point for the development of these new devices. Tandem DSC devices are one example of such a concept, and can be constructed using two photoactive electrodes (one photoanode and one photocathode) inside the one cavity, increasing the theoretical efficiency limit by around 50% as compared to the conventional design. As there has been substantial effort devoted to the development of ntype DSCs, the focus of researchers investigating tandem DSCs has been to create high performance p-type systems, which operate by an analogous, but inverted, mechanism to n-type DSCs.

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Visible light driven hydrogen production from a photo-active cathode based on a molecular catalyst and organic dye-sensitized p-type nanostructured NiO

Abstract: A molecular device with a photocathode for hydrogen generation has been successfully demonstrated, based on an earth abundant and inexpensive p-type semiconductor NiO, an organic dye P1 and a cobalt catalyst Co1.

Cited by 249 publications

References 39 publications

From natural to artificial photosynthesis

From natural to artificial photosynthesis

Dye-sensitized PS- b -P2VP-templated nickel oxide films for photoelectrochemical applications

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

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