Continuous flow gas phase photoreforming of methanol at elevated reaction temperatures sensitised by Pt/TiO₂

Abstract

Gas phase photoreforming of methanol using a Pt/TiO2 photocatalyst has been performed under flow conditions at elevated temperatures.

Modelled kinetics of the rate of hydrogen evolution as a function of metal catalyst loading in the photocatalysed reforming of methanol by Pt (or Pd)/TiO2

“…All Pt/TiO 2 photocatalysts were prepared using the incipient wetness method [11,28] [11] showed that the metal particles are mainly round and mondispersed.…”

“…In the study of reaction (1) in the gas phase, using the different Pt/TiO 2 photocatalyst samples, a serpentine 'S-bend' borosilicate glass reactor [28], shown in figure 3, with internal and external diameters of 3.75 mm and 6 mm, respectively, was loaded with ca. Note: although the [MeOH] used in the gas phase study (2.08 mM) was much lower than that used in the aqueous phase study (12.4 M), for practical reasons and to allow comparison with another gas phase study [28], other work by Bowker et al [11,17] demonstrated that the rate of reaction was largely independent of [MeOH].…”

“…the same photocatalysed reforming reaction, although using a different metal, but deposited using the same method (i.e. the incipient wetness method[28]). As a result, key experimental values for the Pd/TiO 2 and Pt/TiO 2 systems, such as %wt metal, r, %wt(max), are similar, making the key model values: N, R and r* similar.…”

Solar Fuels by Heterogeneous Photocatalysis: From Understanding Chemical Bases to Process Development

“…Similarly to CO 2 photoreduction, PR has been extensively carried out in the liquid phase [161,162,168,191,216,241]. Gas phase conditions have been barely reported and only volatile compounds such as methane [242,243], methanol [244,245] and ethanol [170,175,246] have been used. Nevertheless, as reported by Ampelli et al, gas phase conditions have several advantages over liquid conditions [170], such as:…”

Plasmonic Au nanoparticles supported on both sides of TiO2 hollow spheres for maximising photocatalytic activity under visible light

“…Titanium dioxide is a semiconductor that has attracted increasing interests in photocatalytic and photovoltaic applications [1][2][3][4] because of the great oxidative potential of its positive holes (E = + 3.0 V versus standard hydrogen electrode) [5], especially in the anatase form. However, due to the wide band-gap of 3.2 eV (for the anatase form) [6], TiO 2 has trivial response to the visible light (wavelength: 390-700 nm) [7,8] hindering the develop-ment of visible-light-driven photocatalysts based on TiO 2 for energy and environmental applications [6,9].…”