Photocatalytic reforming of C3-polyols for H2 production

Fu, Xianliang; Wang, Xuxu; Leung, Dennis Y.C.; Gu, Quan; Chen, Shifu; Huang, Haibao

doi:10.1016/j.apcatb.2011.05.045

Cited by 57 publications

(39 citation statements)

References 53 publications

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“…Higher hydrogen production rates are reported in the literature review with increasing the amount of OH groups of the organic molecule: polyols (i.e., glucose and glycerol) exhibit remarkable photoefficiency for hydrogen generation [106]. Such a phenomenon has been related to the ability of hydroxyl groups to enhance substrate adsorption on active sites of the photocatalyst.…”

Section: Reaction Mechanismmentioning

confidence: 83%

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: Reaction Mechanismmentioning

confidence: 83%

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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“…Among them, those with more OH groups and more α‐H show the best H 2 production rates. Therefore, methanol and glycerol are the most suitable alcohols for H 2 production . Glycerol has received much attention as sacrificial agent because it provides a H 2 production rate of 70 mmol g −1 h −1 …”

Section: Influence Of System Units On Photocatalytic Performancementioning

confidence: 99%

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Corredor

Rivero

Rangel

et al. 2019

J of Chemical Tech & Biotech

159

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Hydrogen represents a renewable energy alternative that may positively contribute to get over the global energy crisis while at the same time reducing its environmental burden. Overcoming the challenge of reaching this potential could be helped by careful choice of hydrogen (H2) sources. Photocatalytic generation of H2, although a minor alternative, appears to be a very good option at the time that liquid wastes are being degraded; therefore, this approach has given rise to an increasing number of interesting studies. Here, we aim to provide an integrated overview of the different photocatalytic, heterogeneous, homogeneous and hybrid systems. First, we categorize the units and mechanisms that take part in the photocatalytic process, and secondly we analyze their role and draw comparative conclusions. Thus, we analyze the role of (i) the electron source to carry out proton reduction, (ii) the proton source, which can be free protons in the medium or a proton donor compound, (iii) the catalyst nature and concentration, and (iv) the photosensitizer nature and concentration. We also provide an analysis of the influence of the solvent, especially in homogenous systems as well as the influence of pH. We provide a comparison of the photocatalytic performance, highlighting the advantages and disadvantages, of different systems. Thus, this review is, on the one hand, an update on the state of the art of photocatalytic generation of H2 from a full perspective that integrates homogeneous, heterogeneous and hybrid systems, and, on the other, a source of useful information for future research. © 2019 Society of Chemical Industry

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“…The adsorption of polyol on TiO 2 can result in levels inside the TiO 2 bandgap, responsible for the fast hole trapping efficiency [35]. By comparing isopropanol, propyleneglycol, and glycerol with increasing number of OH groups in the molecule H 2 production increased and alkanes concentration decreased [204]. Furthermore, undercoordinated surface Ti sites can be stabilized by hydroxyl groups, water, or other hydroxylic molecules, such as alcohols, polyols, and carbohydrates [202,205,206].…”

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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Photocatalytic reforming of C3-polyols for H2 production

Cited by 57 publications

References 53 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

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Hydrogen Production by Photoreforming of Renewable Substrates

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