Enhanced photocatalytic hydrogen production by improving the Pt dispersion over mesostructured TiO2

Serrano, David; Calleja, Guillermo; Pizarro, Patricia; Gálvez, Pilar

doi:10.1016/j.ijhydene.2014.01.067

Cited by 33 publications

(20 citation statements)

References 38 publications

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“…The textural parameters from nitrogen adsorption/desorption isotherms of the parent and sulfated zirconia samples are listed in Tables 1 and 2. The isotherms are of IV type (Fig.2), characteristic of mesoporous materials, and similar to those usually found in inorganic oxides synthesized by the hard-templating route [24][25][26]. By using the template, samples with higher surface area and pore volume can be prepared.…”

Section: Catalytic Activity Measurementssupporting

confidence: 71%

“…The activity of sulfated oxides can be improved by optimizing preparation conditions, which can influence the number of acid sites and the dispersion state of the sulfate species. One possible approach to enhance acid sites dispersion is the introduction of mesopores in the metal oxides via micelle templating [23,24,26,27]. The improvement of acid catalyst stability was achieved by incorporation of a moderate amount of Si (up to 30 mol% Si per Zr) into sulfated ZrO2.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the preparation method of sulfated zirconia nanoparticles for levulinic acid esterification

Popova

Szegedi

Lazarova

et al. 2016

Reac Kinet Mech Cat

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Zirconia nanomaterials were prepared by hydrothermal synthesis with or without template and were modified by post synthesis method with sulfate groups. The materials were thoroughly characterized by X-ray powder diffraction (XRD), N2 physisorption, UV-Vis spectroscopy, TG analysis and XPS spectroscopy. The catalytic performance of nanosized mesoporous ZrO2 catalysts and their sulfated modifications was studied in levulinic acid (LA) esterification with ethanol. The sulfate group's dispersion was predetermined by the use of template during the mesoporous zirconia synthesis. A relation between sulfate groups leaching and the applied synthesis conditions (with or without template) of the zirconia nanoparticles was found. Sulfated materials showed significantly higher activity compared to non-sulfated ones. Furthermore, it has been found that the presence of

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Section: Catalytic Activity Measurementssupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Influence of the preparation method of sulfated zirconia nanoparticles for levulinic acid esterification

Popova

Szegedi

Lazarova

et al. 2016

Reac Kinet Mech Cat

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“…It has been widely recognized that platinum is a highly active cocatalyst for photocatalytic hydrogen evolution reaction [50][51][52]. For comparison purposed, the composite photocatalysts of ZnTCPP-Pt/ZnO were prepared for visible light induced rate of 67 µmol h -1 g -1 , which is lower than that of 0.50 wt% ZnTCPP-MoS 2 /ZnO photocatalyst (75 µmol h -1 g -1 , Fig.…”

Section: Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Visible-light-driven hydrogen production from water in a noble-metal-free system catalyzed by zinc porphyrin sensitized MoS 2 /ZnO

Yuan

et al. 2015

Dyes and Pigments

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“…Thus, the loading of Pt onto La0.02Na0.98TaO3 surface can improve its photocatalytic performance. Catalysts with Pt loading can effectively restrain the recombination of the photogenerated charge carriers due to an ohmic junction formed between the loaded Pt, and semiconductor can enhance the separation efficiency of carriers [18]. When the Pt concentration is increased above 0.3 wt%, the photocatalytic activity decreased gradually.…”

Section: -4mentioning

confidence: 99%

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Husin

Adisalamun

et al. 2017

AIP Conference Proceedings

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Abstract. Pt nanoparticles on La-doped sodium tantalum oxide (La0.02Na0.98TaO3), which acts as an active co-catalyst for H2 evolution under UV light irradiation was successfully synthesized by photo-deposition method. The La0.02Na0.98TaO3 photocatalyst was obtained by the reaction of La(NO3)2.3H2O, TaCl5, and NaOH at ambient temperature. The catalyst produced was characterized by a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (HRTEM). SEM images of the La0.02Na0.98TaO3 sample showing that its particles size is ranging between 50-150 nm. The Pt particles are detected from HRTEM images is around 2-4 nm. The Pt/La0.02Na0.98TaO3 samples prepared were applied for photocatalytic H2 production at 30 o C. The photocatalyst performance was evaluated for hydrogen production from water combining with glycerol as an electron donor (sacrificial reagent). The reactions were carried out in a closed reactor with a gas circulation system, illuminated with mercury (Hg) lamp. The experimental results show that the presence of glycerol in the systems can not only improve the efficiency of photocatalytic hydrogen generation but can also be decomposed to hydrogen efficiently. The photocatalytic activity of La0.02Na0.98TaO3 is significantly enhanced when Pt was loaded onto its crystalline surface.

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Enhanced photocatalytic hydrogen production by improving the Pt dispersion over mesostructured TiO2

Cited by 33 publications

References 38 publications

Influence of the preparation method of sulfated zirconia nanoparticles for levulinic acid esterification

Influence of the preparation method of sulfated zirconia nanoparticles for levulinic acid esterification

Visible-light-driven hydrogen production from water in a noble-metal-free system catalyzed by zinc porphyrin sensitized MoS 2 /ZnO

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

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