The Potential of Supported Cu<sub>2</sub>O and CuO Nanosystems in Photocatalytic H<sub>2</sub> Production

Barreca, Davide; Fornasiero, Paolo; Gasparotto, Alberto; Gombac, Valentina; Maccato, Chiara; Montini, Tiziano; Tondello, Eugenio

doi:10.1002/cssc.200900032

Cited by 235 publications

(190 citation statements)

References 19 publications

(25 reference statements)

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“…Whereas, holes are transferred simultaneously from VB(A) to VB(B) and as a result photogenerated electrons and holes are separated from each other, reducing the recombination probability and increasing the lifetimes of the charge carriers [71]. Both copper oxides, especially Cu2O, are very promising semiconductors for photocatalytic hydrogen production [72][73][74][75]. The main limitation of their application results from not good photostability, which is very important issue for oxidative photocatalytic systems.…”

Section: Metallic Copper-plasmonic Photocatalysismentioning

confidence: 99%

“…In the middle of eighties Okamoto et al prepared Cu-deposited TiO2 by UV-irradiation of deaerated suspension of slightly reduced (in hydrogen) anatase powder in the presence of CuSO4 [34]. They assumed that only Both copper oxides, especially Cu 2 O, are very promising semiconductors for photocatalytic hydrogen production [72][73][74][75]. The main limitation of their application results from not good photostability, which is very important issue for oxidative photocatalytic systems.…”

Section: Cuo-tio2 Heterojunctionmentioning

confidence: 99%

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On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

2017

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Modification of titania with copper is a promising way to enhance the photocatalytic performance of TiO 2 . The enhancement means the significant retardation of charge carriers' recombination ratio and the introduction of visible light activity. This review focuses on two main ways of performance enhancement by copper species-i.e., originated from plasmonic properties of zero-valent copper (plasmonic photocatalysis) and heterojunctions between semiconductors (titania and copper oxides). The photocatalytic performance of copper-modified titania is discussed for oxidative reaction systems due to their importance for prospective applications in environmental purification. The review consists of the correlation between copper species and corresponding variants of photocatalytic mechanisms including novel systems of cascade heterojunctions. The problem of stability of copper species on titania, and the methods of its improvement are also discussed as important factors for future applications. As a new trend in the preparation of copper-modified titania photocatalyst, the role of particle morphology (faceted particles, core-shell structures) is also described. Finally, in the conclusion section, perspectives, challenges and recommendations for future research on copper-modified titania are formulated.

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Section: Metallic Copper-plasmonic Photocatalysismentioning

confidence: 99%

Section: Cuo-tio2 Heterojunctionmentioning

confidence: 99%

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

2017

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“…Cu x O-TiO 2 (x = 1, 2) nanocomposites were tested for ethanol PR [180,181]. The best performance was achieved with 1 wt% metal loading, due to the main presence of Cu(I) ions, active sites for the transfer of photogenerated electrons, whereas Cu(II) species seem to promote electron-hole recombination.…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

“…The PR of aqueous solutions of ethanol and glycerol has been performed over CuO x /TiO 2 catalysts prepared in different ways [181,185]. The higher dispersion of the metal oxide achieved by embedding CuO via a microemulsion technique allowed superior activity with respect to classical impregnation.…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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This paper focuses on the application of photocatalysis to hydrogen production from organic substrates. This process, usually called photoreforming, makes use of semiconductors to promote redox reactions, namely, the oxidation of organic molecules and the reduction of H + to H 2 . This may be an interesting and fully sustainable way to produce this interesting fuel, provided that materials efficiency becomes sufficient and solar light can be effectively harvested. After a first introduction to the key features of the photoreforming process, the attention will be directed to the needs for materials development correlated to the existing knowledge on reaction mechanisms. Examples are then given on the photoreforming of alcohols, the most studied topic, especially in the case of methanol and carbohydrates. Finally, some examples of more complex but more interesting substrates, such as waste solutions, are proposed.

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“…Nanostructured Si light absorbers also have been successfully used as photosensitizers for hydrogen evolution [82,83]. Another attractive material is Cu 2 O, a p-type semiconductor that has been employed as a photocathode in hydrogen production [84,85].…”

Section: Nanoscale Components For Solar Hydrogen Generationmentioning

confidence: 99%

Multidisciplinary approaches to solar hydrogen

Bren

2015

Interface Focus.

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This review summarizes three different approaches to engineering systems for the solar-driven evolution of hydrogen fuel from water: molecular, nanomaterials and biomolecular. Molecular systems have the advantage of being highly amenable to modification and detailed study and have provided great insight into photophysics, electron transfer and catalytic mechanism. However, they tend to display poor stability. Systems based on nanomaterials are more robust but also are more difficult to synthesize in a controlled manner and to modify and study in detail. Biomolecular systems share many properties with molecular systems and have the advantage of displaying inherently high efficiencies for light absorption, electron–hole separation and catalysis. However, biological systems must be engineered to couple modules that capture and convert solar photons to modules that produce hydrogen fuel. Furthermore, biological systems are prone to degradation when employed in vitro . Advances that use combinations of these three tactics also are described. Multidisciplinary approaches to this problem allow scientists to take advantage of the best features of biological, molecular and nanomaterials systems provided that the components can be coupled for efficient function.

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The Potential of Supported Cu₂O and CuO Nanosystems in Photocatalytic H₂ Production

Cited by 235 publications

References 19 publications

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

Hydrogen Production by Photoreforming of Renewable Substrates

Multidisciplinary approaches to solar hydrogen

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The Potential of Supported Cu2O and CuO Nanosystems in Photocatalytic H2 Production

Cited by 235 publications

References 19 publications

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

Hydrogen Production by Photoreforming of Renewable Substrates

Multidisciplinary approaches to solar hydrogen

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Product

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The Potential of Supported Cu₂O and CuO Nanosystems in Photocatalytic H₂ Production