Thin film n-titanium oxide photoanodes for photoelectrochemical production of hydrogen

Arakelyan, V. M.; Aroutiounian, V. M.; Shahnazaryan, G. E.; Khachaturyan, E. A.

doi:10.1016/j.renene.2007.05.012

Cited by 11 publications

(10 citation statements)

References 12 publications

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“…Besides offering a high catalytic activity [58], nanomaterials can provide enhanced performances thanks to a suppression of ohmic losses, usually occurring in bulk semiconductors [59,60]. In addition, the band gap energy may be in principle tuned with particle size, in order to increase light absorption in the solar spectrum [61].…”

Section: Materials and Mechanismsmentioning

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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Section: Materials and Mechanismsmentioning

confidence: 99%

Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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“…Beside titania thin films prepared by RF‐magnetron sputtering (see Section 3),46, 79 attention has been devoted to self‐organized TiO 2 nanotubular arrays produced by anodization of Ti metal foils, as previously described in Section 3 and Figure 6 19. Their use as photoanodes in PEC cells for H 2 production has yielded a photocurrent up to 24 mA cm −2 under simulated solar light 32.…”

Section: Photo‐electrochemical H2o Splittingmentioning

confidence: 99%

“…These characteristics, in turn, concur in determining a minimized carrier‐transport distance and an increased surface area available for charge‐transfer processes, minimizing recombination losses 8, 40, 43, 63, 77, 78. Beside offering a high catalytic activity,20 nanomaterials can provide enhanced performances thanks to a suppression of ohmic losses, usually occurring in bulk SCs 34, 79. In addition, the magnitude of E g in SC nanosystems can, in principle, be tuned as a function of particle size, in order to increase light absorption in the solar spectrum 63.…”

Section: Introductionmentioning

confidence: 97%

Electric‐Field‐Assisted Growth of Functionalized Poly(3,4‐ethylenedioxythiophene) Nanowires for Label‐Free Protein Detection

Hong

Luo

2009

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The construction of functionalized poly(3,4-ethylenedioxythiophene) (PEDOT) nanowire devices for label-free protein detection is reported. Direct growth/assembly of PEDOT nanowires with carboxylic acid side-chain functional groups (poly(EDOT-COOH)) across the electrode junction is achieved by using an electric-field-assisted method. These functionalized PEDOT nanowire devices show typical depletion-mode p-type field-effect transistor (FET) properties. Upon conjugation with a protein-binding aptamer, the PEDOT nanowire FET devices are used for label-free electronic detection of a target protein of interest. The binding of a positively charged protein causes a substantial decrease in current flow, attributed to the specific interaction between target protein molecules and aptamer-conjugated polymer chains.

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“…(3) The system yields a mixture of H 2 and O 2 for the proximity of the redox sites . Thus, the immobilization of TiO 2 photocatalysts in the form of films has been widely investigated for hydrogen production utilizing solar energy in photoelectrochemical cells. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing Temperature on the Hydrogen Production of TiO₂ Nanotube Arrays in a Two-Compartment Photoelectrochemical Cell

et al. 2011

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Due to the energy crisis, it is necessary to develop clean and renewable energy sources. In this study, we report an efficient and economical technology to produce hydrogen from solar energy by splitting water in a two-compartment photoelectrochemical (PEC) cell without any external applied voltage. To enhance the solar conversion efficiency, highly ordered TiO2 nanotube arrays with 4 μm in length were synthesized by a rapid anodization process in ethylene glycol electrolyte. Crystal phase and morphology of the TiO2 nanotubes (NTs) samples annealed at various temperatures were characterized by XRD and FESEM. Transient photocurrent response and linear sweep voltammetry curves were measured using electrochemical working station under solar light illumination. The photocatalytic activity was evaluated by the hydrogen production in the PEC cell. The results indicated that the crystal phase and morphology of TiO2 NTs had no great changes at low annealing temperatures. Anatase phase and tubular structure of TiO2 NTs were stable up to 450 °C. With further increase in temperature, the crystallization transformation from anatase to rutile phase appeared, accompanied by the destruction of tubular structures. Due to the excellent crystallization and the maintenance of tubular structures, TiO2 NTs annealed at 450 °C exhibited the highest photoconversion efficiency of 4.49% and maximum hydrogen production rate of 122 μmol/(h·cm2), which is superior to most of those reported so far.

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Thin film n-titanium oxide photoanodes for photoelectrochemical production of hydrogen

Cited by 11 publications

References 12 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

Electric‐Field‐Assisted Growth of Functionalized Poly(3,4‐ethylenedioxythiophene) Nanowires for Label‐Free Protein Detection

Effect of Annealing Temperature on the Hydrogen Production of TiO₂ Nanotube Arrays in a Two-Compartment Photoelectrochemical Cell

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Thin film n-titanium oxide photoanodes for photoelectrochemical production of hydrogen

Cited by 11 publications

References 12 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

Electric‐Field‐Assisted Growth of Functionalized Poly(3,4‐ethylenedioxythiophene) Nanowires for Label‐Free Protein Detection

Effect of Annealing Temperature on the Hydrogen Production of TiO2 Nanotube Arrays in a Two-Compartment Photoelectrochemical Cell

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Effect of Annealing Temperature on the Hydrogen Production of TiO₂ Nanotube Arrays in a Two-Compartment Photoelectrochemical Cell