Effects of particle size on photoassisted water-gas shift reaction over Pt/TiO2

Titanium Dioxide in Photocatalysis

“…However, the predominant pathway for electron-hole recombination may be different depending on the particles size, especially at the nanoscale, where the surface/volume ratio is very large. In 1984, Tsai and Chung [88] showed that the decomposition of CO increased as the radius of the particles decreased. According to the theoretical and experimental studies found in the literature it seems that there is an optimal value of the particles size around 10-20 nm.…”

Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor

“…One such reaction is the WGSR, although a metal cocatalyst also needs to be present, i.e. M/TiO2, where M is usually a noble metal [8][9][10][11][12][13], i.e. M/TiO2 CO + H2O ⎯⎯⎯⎯⎯→ CO2 + H2…”

“…(2) hv > 3.2 eV In the 1980's, work carried out by the various research groups [8][9][10][11][12][13] on the photocatalytic WGSR, i.e. reaction (2), focussed on using M/TiO2, where M = Pt or Pd, usually using a batch reactor with a circulating gas phase and run at low temperatures, i.e.…”

“…reaction (2), focussed on using M/TiO2, where M = Pt or Pd, usually using a batch reactor with a circulating gas phase and run at low temperatures, i.e. between 30-60 o C [8][9][10][11][12][13]. As reported by Sato et al [12] in their study of the photocatalytic WGSR, i.e.…”

Photo-Catalytic Water-Gas Shift Reaction

“…Then Tsai and Chung [6] reported the effect of TiO 2 particle size on the photo-catalytic activity of Pt/TiO 2 catalysts. Then Tsai and Chung [6] reported the effect of TiO 2 particle size on the photo-catalytic activity of Pt/TiO 2 catalysts.…”