Sonnengetriebene Wasserstofferzeugung aus Lignocellulose

Kuehnel, Moritz F.; Reisner, Erwin

doi:10.1002/ange.201710133

Cited by 26 publications

(5 citation statements)

References 71 publications

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“…Holes in the valence band oxidise an oxygenated organic substrate into smaller molecules or CO 2 (Figure 1). Substrates can include freely-available biomass, food or certain types of plastic waste, [8][9][10][11][12] thereby removing the need for costly sacrificial reagents and simultaneously contributing to waste mitigation. Gas separation is also straightforward as O 2 is not produced.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, PR is less energetically demanding than overall water splitting and can in principle proceed on various narrow band gap photocatalysts capable of absorbing a wide range of visible and even infrared light. [9] Despite these various advantages, PR of real waste (polyester microfibers) has only been up-scaled in batch to an irradiation area of 60 cm 2 with the photocatalyst in suspension, producing 76 μmol H 2 m À 2 h À 1 . [11] This system faced several challenges, including photocatalyst sedimentation during PR due to inefficient stirring, as well as competing light absorption and scattering from the waste particulates.…”

Section: Introductionmentioning

confidence: 99%

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Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

et al. 2020

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Solar-driven reforming uses sunlight and a photocatalyst to generate H 2 fuel from waste at ambient temperature and pressure. However, it faces practical scaling challenges such as photocatalyst dispersion and recyclability, competing light absorption by the waste solution, slow reaction rates and low conversion yields. Here, the immobilisation of a noble-metalfree carbon nitride/nickel phosphide (CN x j Ni 2 P) photocatalyst on textured glass is shown to overcome several of these limitations. The 1 cm 2 CN x j Ni 2 P panels photoreform plastic, biomass, food and mixed waste into H 2 and organic molecules with rates comparable to those of photocatalyst slurries. Furthermore, the panels enable facile photocatalyst recycling and novel photoreactor configurations that prevent parasitic light absorption, thereby promoting H 2 production from turbid waste solutions. Scalability is further verified by preparing 25 cm 2 CN x j Ni 2 P panels for use in a custom-designed flow reactor to generate up to 21 μmol H 2 m À 2 h À 1 under "real-world" (seawater, low sunlight) conditions. The application of inexpensive and readily scalable CN x j Ni 2 P panels to photoreforming of a variety of real waste streams provides a crucial step towards the practical deployment of this technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

et al. 2020

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“…Photoreforming (PR) provides an alternative to O 2 evolution by oxidizing waste substrates into valuable organics instead [9–12] . Waste oxidation through PR has mainly been performed in combination with proton reduction to H 2 .…”

Section: Figurementioning

confidence: 99%

Comproportionation of CO₂ and Cellulose to Formate Using a Floating Semiconductor‐Enzyme Photoreforming Catalyst

et al. 2023

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Formate production via both CO2 reduction and cellulose oxidation in a solar‐driven process is achieved by a semi‐artificial biohybrid photocatalyst consisting of immobilized formate dehydrogenase on titanium dioxide (TiO2|FDH) producing up to 1.16±0.04 mmolformate g TiO2 ${{_{\ {\rm TiO}{_{2}}}}}$ −1 in 24 hours at 30 °C and 101 kPa under anaerobic conditions. Isotopic labeling experiments with 13C‐labeled substrates support the mechanism of stoichiometric formate formation through both redox half‐reactions. TiO2|FDH was further immobilized on hollow glass microspheres to perform more practical floating photoreforming allowing vertical solar light illumination with optimal light exposure of the photocatalyst to real sunlight. Enzymatic cellulose depolymerization coupled to the floating photoreforming catalyst generates 0.36±0.04 mmolformate per m2 irradiation area after 24 hours. This work demonstrates the synergistic solar‐driven valorization of solid and gaseous waste streams using a biohybrid photoreforming catalyst in aqueous solution and will thus provide inspiration for the development of future semi‐artificial waste‐to‐chemical conversion strategies.

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“…These strong oxidizing substances (•OH and h + ) would oxidize glucose to produce value-added chemicals. [32,33] TiO 2 remains as the most widely studied semiconductor photocatalyst, and the mechanism of photocatalytic reforming process has been extensively researched. [31,[34][35][36][37][38][39][40][41] Although TiO 2 has been extensively researched as a photocatalyst, its further application in the field of photocatalytic H 2 generation has been hampered by its inherent shortcomings, notably the limited light absorption to only UV region and the rapid recombination of photogenerated carriers.…”

Section: Introductionmentioning

confidence: 99%

Gold/titania Nanorod Assembled Urchin-like Photocatalysts with an Enhanced Hydrogen Generation by Photocatalytic Biomass Reforming

Shi¹,

Yuan²,

Qu³

et al. 2021

Eng. Sci

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Herein, we successfully constructed Au/hierarchical urchin-like TiO 2 architectures (Au/HT) photocatalysts, which were assembled by crystalline nanorods by one-step solvothermal method under mild conditions. The as-prepared samples showed an outstandingly renewable H 2 evolution by the photocatalytic glucose reforming. Au/HT revealed a high H 2 evolution rate of 616.23 μmol h -1 g -1 under visible-light irradiation at low temperatures without any additional Pt co-catalyst, which was about 46.23 and 15.81 times than that of P25 and HT, since the (one-dimensional) 1D nanorods could effectively accelerate electron transfer and restrain the recombination of photogenerated carriers, meanwhile, (three-dimensional) 3D hierarchical architectures could improve the light capturing capability of HT, and surface-plasmon resonance (SPR) effect of Au nanoparticles, which further improved the separation efficiency of photogenerated charges, extended the visible light absorption, and accelerated the H 2 generation. This work offers a potential way to produce sustainable H 2 from environmentally renewable biomass materials using solar energy.

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Sonnengetriebene Wasserstofferzeugung aus Lignocellulose

Cited by 26 publications

References 71 publications

Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

Comproportionation of CO₂ and Cellulose to Formate Using a Floating Semiconductor‐Enzyme Photoreforming Catalyst

Gold/titania Nanorod Assembled Urchin-like Photocatalysts with an Enhanced Hydrogen Generation by Photocatalytic Biomass Reforming

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Sonnengetriebene Wasserstofferzeugung aus Lignocellulose

Cited by 26 publications

References 71 publications

Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

Scalable Photocatalyst Panels for Photoreforming of Plastic, Biomass and Mixed Waste in Flow

Comproportionation of CO2 and Cellulose to Formate Using a Floating Semiconductor‐Enzyme Photoreforming Catalyst

Gold/titania Nanorod Assembled Urchin-like Photocatalysts with an Enhanced Hydrogen Generation by Photocatalytic Biomass Reforming

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Product

Resources

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Comproportionation of CO₂ and Cellulose to Formate Using a Floating Semiconductor‐Enzyme Photoreforming Catalyst