Hydrogen Production by Photo-Induced Reforming of Biomass Components and Derivatives at Ambient Conditions

Kondarides, Dimitris Ι.; Daskalaki, Vasileia M.; Πατσούρα, Αλεξία; Verykios, Xenophon E.

doi:10.1007/s10562-007-9330-3

Cited by 324 publications

(249 citation statements)

References 33 publications

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“…Under equal testing conditions, photoreforming of organics leads to hydrogen generation rates more than two orders of magnitude higher than photocatalytic water splitting [124]. In this respect, some of the most relevant results collected in the literature review are reported in Table 2.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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Photocatalytic water splitting and organic reforming based on nano-sized composites are gaining increasing interest due to the possibility of generating hydrogen by employing solar energy with low environmental impact. Although great efforts in developing materials ensuring high specific photoactivity have been recently recorded in the literature survey, the solar-to-hydrogen energy conversion efficiencies are currently still far from meeting the minimum requirements for real solar applications. This review aims at reporting the most significant results recently collected in the field of hydrogen generation through photocatalytic water splitting and organic reforming, with specific focus on metal-based semiconductor nanomaterials (e.g., metal oxides, metal (oxy)nitrides and metal (oxy)sulfides) used as photocatalysts under UVA or visible light irradiation. Recent developments for improving the photoefficiency for hydrogen generation of most used metal-based composites are pointed out. The main synthesis and operating variables affecting photocatalytic water splitting and organic reforming over metal-based nanocomposites are critically evaluated.

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Section: Methodsmentioning

confidence: 99%

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

et al. 2017

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“…The feasibility of PR of different biomass-derived compounds has been proved [38] with alcohols, organic acids, and different carbohydrates, such as ribose, arabinose, glucose, galactose, fructose, and mannose. In all cases, the amounts ISRN Chemical Engineering 3 of excess H 2 with respect to simple WS and CO 2 produced are in accordance with the stoichiometry of the following reaction:…”

Section: Materials and Mechanismsmentioning

confidence: 99%

“…Therefore, means for the energetic valorization of this polyalcohol are more than welcome, in light of its increasing availability. 0.5 wt% Pt/TiO 2 was tested for glycerol PR in aqueous solution, increasing the H 2 production rate by one order of magnitude with respect to pure water [38]. Other examples of glycerol PR over Pd/TiO 2 and Au/TiO 2 were proposed in [13], though the catalysts were sensitive to UV light only.…”

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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“…4B). Incipient methanol can act as a sacrificial agent and in part can be completely oxidized to carbon dioxide and H 2 [23,24]. The data at 5 hours were measured but were under the limit of determinableness which was determined as 12 μg CH 3 OH per L (i.e.…”

Section: Effect Of Calcination Temperaturementioning

confidence: 99%

Effect of calcination temperature and calcination time on the kaolinite/tio2 composite for photocatalytic reduction of CO2

Reli¹,

Kočí²,

Matějka³

et al. 2012

GeoScience Engineering

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The kaolinite/TiO 2 composite (60 wt% of TiO 2 ) was prepared by thermal hydrolysis of a raw kaolin suspension in titanyl sulphate and calcined at different temperatures (600, 650 and 700°C) and for different times (1, 2 and 3 h). The obtained samples were characterized by XRPD, N 2 physical adsorption and SEM, and tested for photocatalytic reduction of CO 2 . The different calcination conditions did not influence TiO 2 phase composition, only slightly changed the specific surface area, and significantly affected crystallite size of kaolinite/TiO 2 composite. A higher temperature and longer duration of calcination lead to higher crystallinity of the powder. The photocatalytic results showed that the crystallite size determined the efficiency of kaolinite/TiO 2 photocatalysts. AbstraktKompozit kaolinit/TiO 2 (60 hm% TiO 2 ) byl připraven termální hydrolýzou suspenze surového kaolinu v síranu titanylu a kalcinován při různých teplotách (600, 650 a 700°C) a po různou dobu (1, 2 a 3 h). Získaný vzorek byl charakterizován pomocí XRPD, N 2 fyzikální adsorpcí a SEM, a testován na fotokatalytickou redukci CO 2 . Rozdíl kalcinačních podmínek neovlivnil složení fáze TiO 2 , pouze se mírně pozměnila specifická povrchová plocha a výrazně byla ovlivněna velikost krystalitu kompozitu kaolinit/TiO 2 . Vyšší teplota a delší doba kalcinace vedly k vyšší krystalitě prášku. Fotokatalytické výsledky ukázaly, že velikost krystality určuje účinnost fotokatalyzítoru kaolinit/TiO 2 .

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Hydrogen Production by Photo-Induced Reforming of Biomass Components and Derivatives at Ambient Conditions

Cited by 324 publications

References 33 publications

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Hydrogen Generation through Solar Photocatalytic Processes: A Review of the Configuration and the Properties of Effective Metal-Based Semiconductor Nanomaterials

Hydrogen Production by Photoreforming of Renewable Substrates

Effect of calcination temperature and calcination time on the kaolinite/tio2 composite for photocatalytic reduction of CO2

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