Photocatalytic reforming of biomass: A systematic study of hydrogen evolution from glucose solution

Fu, Xianliang; Long, Jinlin; Wang, Xuxu; Leung, Dennis Y.C.; Ding, Zhengxin; Wu, Ling; Zhang, Zizhong; Li, Zhaohui; Fu, Xianzhi

doi:10.1016/j.ijhydene.2008.07.068

Cited by 320 publications

(241 citation statements)

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“…For instance, glucose is an efficient hole scavenger for titania [10,[33][34][35]. Theoretical studies on glucose adsorption over titania showed distinct intragap states; this explains its hole trapping role in TiO 2 [34].…”

Section: Materials and Mechanismsmentioning

confidence: 97%

“…When a metal (with proper work function) is deposed on a semiconductor, excited electrons from the semiconductor migrate to the metal until the two Fermi levels are aligned. The Schottky barrier [10,32] formed at the metal and semiconductor interface can serve as an efficient electron trap to prevent photogenerated electronhole recombination, greatly enhancing the efficiency of the photocatalytic reaction. The metal also serves as an active site for H 2 production, in which the trapped photogenerated electrons are transferred to protons to produce H 2 .…”

Section: Materials and Mechanismsmentioning

confidence: 99%

“…Compared to thermochemical processes, photocatalytic reforming (PR) is a valid approach to produce H 2 under ambient conditions and using sunlight, the cheapest energy source available on earth. PR is also thermodynamically more feasible than WS [10]. After a pioneering study in 1980 [11], the attention was more recently focused mostly on the PR of methanol, the simplest molecule, and a few examples of PR of compounds really obtainable from biomass can be found, for example, ethanol, glycerol [12][13][14], glucose, sucrose [14], starch and wood [11], and sewage sludge [15].…”

Section: Introductionmentioning

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: Materials and Mechanismsmentioning

confidence: 97%

Section: Materials and Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogen Production by Photoreforming of Renewable Substrates

Rossetti

2012

ISRN Chemical Engineering

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“…The reaction pathway of glucose oxidation has been investigated by several authors [108,109]. Further efforts in elucidating glucose oxidation were made by Balducci [110], according to whom it proceeds via bridge adsorption on the photocatalyst surface through hydroxyl groups.…”

Section: Reaction Mechanismmentioning

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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“…In recent years, there have been intensive efforts toward the development of novel technologies for the production of hydrogen or methane from renewable resources, mainly water and biomass [1][2][3]. In particular, the food industry produces a large amount of solid and liquid wastes which could be valorized.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

Vaiano

Iervolino

Sarno

et al. 2015

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

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-In this work, the simultaneous production of CH 4 and H 2 from photocatalytic reforming of glucose aqueous solution on Pd-TiO 2 catalysts under UV light irradiation by Light-Emitting Diodes (LED) was investigated. The Pd-TiO 2 catalysts were prepared by the photodeposition method. The Pd content was in the range 0.5-2 wt% and a photodeposition time in the range 15-120 min was used. Pd-TiO 2 powders were extensively characterized by X-Ray Diffraction (XRD), S BET , X-Ray Fluorescence spectrometry (XRF), UV-Vis Diffuse Reflectance Spectra (UV-Vis DRS), TEM and X-Ray Photoelectron Spectroscopy (XPS). It was found that the lower Pd loading (0.5 wt%) and 120 min of photodeposition time allowed us to obtain homogeneously distributed metal nanoparticles of small size; it was also observed that the increase in the metal loading and deposition time led to increasing the Pd 0 species effectively deposited on the sulfated TiO 2 surface. Particle size and the oxidation state of the palladium were the main factors influencing the photocatalytic activity and selectivity. The presence of palladium on the sulfated titania surface enhanced the H 2 and CH 4 production. In fact, on the catalyst with 0.5 wt% Pd loading and 120 min of photodeposition time, H 2 production of about 26 lmol was obtained after 3 h of irradiation time, higher than that obtained with titania without Pd (about 8.5 lmol). The same result was obtained for the methane production. The initial pH of the solution strongly affected the selectivity of the system. In more acidic conditions, the production of H 2 was enhanced, while the CH 4 formation was higher under alkaline conditions.Résumé -Production simultanée de CH 4 et H 2 par réformage photocatalytique d'une solution aqueuse de glucose sur un catalyseur Pd-TiO 2 sulfaté -Dans cette recherche, la production simultanée de CH 4 et H 2 par le reformage photocatalytique de glucose sur les catalyseurs Pd-TiO 2 sous irradiation de lumière UV réalisée par des diodes électroluminescentes (LED) a été étudiée. Les échantillons de Pd-TiO 2 ont été préparés par la méthode de photodéposition. Le contenu de Pd était compris entre 0,5-2 % en poids et il a été utilisé un temps de photodéposition dans la gamme 15-20 minutes. Les poudres Pd-TiO 2 ont été caractérisées par diffraction des rayons X (XRD), surface spécifique BET (S BET ), fluorescence X (XRF), spectrométrie UV visible (UV vis DRS), microscopieThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 5, pp. 891-902 Ó V. Vaiano et al., published by IFP Energies nouvelles, 2015 DOI: 10.2516 électronique à transmission (TEM) et spectrométrie photo électronique X (XPS). Il a été constaté que le chargement inférieur de Pd (0,5 % en poids) et 120 minutes de temps d...

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Photocatalytic reforming of biomass: A systematic study of hydrogen evolution from glucose solution

Cited by 320 publications

References 32 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

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

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

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Photocatalytic reforming of biomass: A systematic study of hydrogen evolution from glucose solution

Cited by 320 publications

References 32 publications

Hydrogen Production by Photoreforming of Renewable Substrates

Hydrogen Production by Photoreforming of Renewable Substrates

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

Simultaneous Production of CH4and H2from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO2Catalysts

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Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts