A Study of Ethanol Reactions over Pt/CeO2 by Temperature-Programmed Desorption and in Situ FT-IR Spectroscopy: Evidence of Benzene Formation

Intrinsic Activity of MnOx-CeO2 Catalysts in Ethanol Oxidation

“…Molecular ethanol ( 12 CH 3 13 CH 2 OH) was desorbed in the form of two or three overlapping peaks at temperatures below 200 • C. Desorption of ethanol from CeO 2 or M/CeO 2 catalysts in the form of one or more overlapping peaks below 200 • C has also been observed by other investigators [11,12,26]. At the same temperature region (below 200 • C), acetaldehyde desorption was observed.…”

“…The interaction of ethanol with ceria-based catalysts including ceria-supported metals (Pd, Pt, Rh, and Co) has been studied with dynamic techniques, such as temperature-programmed desorption (TPD), by several investigators [10][11][12][13]. It has been generally observed that a part of ethanol reversibly adsorbs and desorbs at low temperatures, while the remaining part undergoes surface transformation to other surface species.…”

A review on plasmonic metal⿿TiO2 composite for generation, trapping, storing and dynamic vectorial transfer of photogenerated electrons across the Schottky junction in a photocatalytic system

“…Conversely, photo platinization in water rich environment suppress the CO contamination and seems to promote water adsorption at the surface of Pt clusters which favors hydroxyl radical generation. CO adsorption in the former case hampers the process of photoelectron transfer to the dissolved oxygen thereby reducing the efficiency [47]. Superior activity was observed when deposit size was 2.5-4 nm for the degradation of phenol compared to the samples with higher deposited sizes (4-8 nm) obtained at higher calcination temperature [48].…”

“…Photoplatinization of TiO 2 thin films using water/ethanol (acts as sacrificial electron donor) solutions in the molar ratio of 80/20 showed superior biregime activity for Orange G degradation under UV irradiation [46]. Pt/TiO 2 thin film prepared by using pure ethanolic solution and 50% ethanolic solution showed lower activity suggesting that platinization in water rich environment is more favored [47]. However, such biregime photocatalytic mechanism was not observed for non-platinized TiO 2 thin films due to the poor rate of photoelectron transfer to dissolved oxygen.…”

Comparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanol

“…The presence of Pt metal in the as-prepared catalyst is in sharp contrast to that of the Rh/SrTiO 3 where a large fraction of Rh is found to be in the form or Rh 3? ions. This is typical of Pt deposited on reducible metal oxides where it is often largely present in its metallic form [16,17]. Figure 6 presents results of the hydrogen production using photons of 3.3 eV in a batch reactor containing 0.5 wt% Pt/SrTiO 3 and 0.5 wt% Rh/SrTiO 3 .…”