Ortho-xylene hydroisomerization under pressure on HMS-Ti mesoporous silica decorated with Ga2O3 nanoparticles

Zepeda, T.A.; Pawelec, B.; Infantes‐Molina, Antonia; Yocupicio, R. I.; Alonso-Núñez, G.; Fuentes, S.; León, J.N. Díaz de; Fierro, José Luis García

doi:10.1016/j.fuel.2015.05.056

Cited by 14 publications

(2 citation statements)

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“…The Ga 2p 3/2 peak is constant for all samples too, with a BE value (1117.8 eV) in the range reported for Ga 3+ cations in an oxidic environment. 43,45 Two bands contribute to the O 1s signal without significant variations, which can be attributed to surface chemisorbed carbonate and hydroxyl groups (531.5−531.6 eV) and to lattice O in ZnO (530.1−530.2 eV). 43 A contribution of surface Ga 2 O 3 could not be confirmed or discarded from this photopeak because the O 2p signal is expected in the same range as that in ZnO.…”

Section: Resultsmentioning

confidence: 99%

Ga-Promoted Photocatalytic H₂ Production over Pt/ZnO Nanostructures

Núñez¹,

Fresno²,

Platero‐Prats

et al. 2016

ACS Appl. Mater. Interfaces

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Photocatalytic H2 generation is investigated over a series of Ga-modified ZnO photocatalysts that were prepared by hydrothermal methods. It is found that the structural, textural, and optoelectronic properties remarkably depend on the Ga content. The photocatalytic activity is higher in samples with Ga content equal to or lower than 5.4 wt %, which are constituted by Zn1-xGaxO phases. Structural, textural, and optoelectronic characterization, combined with theoretical calculations, reveals the effect of Ga in the doped ZnO structures. Higher Ga incorporation leads to the formation of an additional ZnGa2O4 phase with spinel structure. The presence of such a phase is detrimental for the textural and optoelectronic properties of the photocatalysts, leading to a decrease in H2 production. When Pt is used as the cocatalyst, there is an increase of 1 order of magnitude in the activity with respect to the bare photocatalysts. This is a result of Pt acting as an electron scavenger, decreasing the electron-hole recombination rate and boosting the H2 evolution reaction.

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Section: Resultsmentioning

confidence: 99%

Ga-Promoted Photocatalytic H₂ Production over Pt/ZnO Nanostructures

Núñez¹,

Fresno²,

Platero‐Prats

et al. 2016

ACS Appl. Mater. Interfaces

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show abstract

“…Table 1 reports Cu dispersion and surface areas of the catalysts as determined from N 2 O chemisorption. Sadly, it was not possible to conduct N 2 O chemisorption experiment with the Ga-doped sample, CZAZGa, because Ga 2 O 3 reduction overlaps with the reduction of Cu, 52 invalidating the assumption that hydrogen consumption during the experiment accounts only to the reduction of copper. Therefore, we also calculated Cu dispersion and surface area of all catalyst from the particle sizes obtained from the XRD results using eqn (5) and (6).…”

Section: Characterizationmentioning

confidence: 99%