The photocatalytic reforming of methanol

Almazroai, Layla S.; Bowker, Michael; Davies, Philip R.; Dickinson, Amanda; Greaves, J.; James, David W.; Millard, Lucy

doi:10.1016/j.cattod.2007.01.022

Cited by 138 publications

(115 citation statements)

References 19 publications

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“…twice 8 ISRN Chemical Engineering than for methanol [13]. As mentioned above [109], the semiconductor plays an active role in the further oxidation of CO to CO 2 , thus regenerating an active site. Therefore, CO actually acts as hole scavenger according to this mechanism [79].…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 95%

“…The effect of different metals and their loading on the reactivity of titania-based catalysts for the PR of methanol has been investigated [109]. The highest catalytic activity was achieved with Pd and Pt, though significant improvement of the photocatalytic activity has been observed also with Ir and Au.…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

“…This has been correlated to the reaction mechanism, studied in detail over Pd/TiO 2 catalysts. The metal active sites should be exposed on the surface of the metallic particle, and it should be connected with photoactive sites on titania [2,109,110]. The H 2 production rate showed dependent on methanol concentration only for diluted solutions, that is, up to the formation of a monolayer of chemisorbed methanol on the catalyst surface.…”

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

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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: Photoreforming Of Alcoholsmentioning

confidence: 95%

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

Section: Photoreforming Of Alcoholsmentioning

confidence: 99%

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Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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“…Therefore, we thought that the degradation of 1b proceeded through the formation of formaldehyde and formic acid (2a) in a similar manner to the case of methanol [14,15] (Figure 4), although the oxidation of amino group of methylamine has been reported [16,17]. This suggested that the amino group was not oxidized in the case of usual 1 having hydrogen at the α-carbons.…”

Section: Degradation Mechanism Of Amines (1a-i)mentioning

confidence: 99%

Neighboring Hetero-Atom Assistance of Sacrificial Amines to Hydrogen Evolution Using Pt-Loaded TiO2-Photocatalyst

et al. 2014

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Photocatalytic H 2 evolution was examined using Pt-loaded TiO 2 -photocatalyst in the presence of amines as sacrificial agents. In the case of amines with all of the carbon attached to the hetero-atom such as 2-aminoethanol, 1,2-diamonoethane, 2-amino-1,3-propanediol, and 3-amino-1,2-propanediol, they were completely decomposed into CO 2 and water to quantitatively evolve H 2 . On the other hand, the amines with both hetero-atoms and one methyl group at the β-positions (neighboring carbons) of amino group such as 2-amino-1-propanol and 1,2-diaminopropane were partially decomposed. Also, the photocatalytic H 2 evolution using amines without the hetero-atoms at the β-positions such as ethylamine, propylamine, 1-butylamine, 1,3-diaminopropane, 2-propylamine, and 2-butylamine was inefficient. Thus, it was found that the neighboring hetero-atom strongly assisted the degradation of sacrificial amines. Moreover, rate constants for H 2 evolution were compared among amines. In conclusion, the neighboring hetero-atom did not affect the rate constants but enhanced the yield of hydrogen evolution.

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“…Some of the previous studies are summarized in Table 1, [2][3][4][5][6][7][8][9][10]. In most of the cases listed in Table 1, TiO 2 is the most widely used semiconductor for various photocatalytic applications due to its relatively low cost, abundance, stability and low toxicity.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Udani

Rønning

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Photocatalytic hydrogen production from a methanol-water solution was investigated in a semi-continuous reactor over different metal-loaded TiO 2 catalysts under UltraViolet (UV) light irradiation. The catalysts were mainly prepared by the incipient wetness impregnation method by varying the metal weight ratio in the range of 1-10 wt%. The effects of metal loading and H 2 pre-treatment on the photocatalytic activity were investigated. In addition, the activity of the catalysts was also compared with a reference Au-TiO 2 catalyst from the World Gold Council (WGC). The photocatalysts were characterized by using X-Ray Diffraction (XRD) and N 2 physisorption before and after the activity measurements. The photocatalytic activity decreased in the order of Pd > Au > Cu > Co in the comparative study of Cu-TiO 2 , Co-TiO 2 , Au-TiO 2 and Pd-TiO 2 . Optimum hydrogen evolution was achieved with 5 wt% Pd-TiO 2 and 5 wt% Cu-TiO 2 .

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The photocatalytic reforming of methanol

Cited by 138 publications

References 19 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

Neighboring Hetero-Atom Assistance of Sacrificial Amines to Hydrogen Evolution Using Pt-Loaded TiO2-Photocatalyst

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

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The photocatalytic reforming of methanol

Cited by 138 publications

References 19 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

Neighboring Hetero-Atom Assistance of Sacrificial Amines to Hydrogen Evolution Using Pt-Loaded TiO2-Photocatalyst

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO2

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Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂