Spectroscopic investigation of sulfur-resistant Pt/K2O/ZrO2/TiO2/Al2O3 NSR/LNT catalysts

In Situ Spectroscopic Investigation of Activation, Start-Up and Deactivation of Promoted Sulfated Zirconia Catalysts

Sulfated zirconia (SZ), unpromoted and promoted with 0.5–2.0 wt% Mn or Fe, was investigated by in situ IR and UV–vis spectroscopy during activation at 723–773 K and interaction with n-butane at 298–323 K. During start-up of the catalysts, the isomerization rate increases with the amount of water that is being formed, consistent with an activation of n-butane via oxidative dehydrogenation. Sulfa...

Molecular Design and In Situ Spectroscopic Investigation of Multilayered Supported M1Ox/M2Ox/SiO2 Catalysts

The group 5-7 transition metal oxides (V2O5, CrO3, MoO3, WO3, and Re2O7) were anchored on a surface modified SiO2 support containing surface alumina, zirconia, and titania species prepared via incipient wetness impregnation of soluble precursors and calcination. The molecular and electronic structures of these “multilayered” supported M1Ox/M2Ox/SiO2 catalysts were characterized with in situ Ram...

Spectroscopic investigation of palladium-copper bimetallic systems for PEM fuel cell catalysts

FT-IR Spectroscopic Studies of Catalysts

The role of FTIR speetroscopy in catalytic studies is briefly discussed and some typical examples are shown. IR spectra of weakly bound hydrogen on PtjSi02 reveal surface heterogeneity; The hydrogen concentration on the surface is described by a Temkin isotherm. Adsorption of unsaturated C6 ring compounds on hydrogen poor PtjSi02 is essentially a self'-hydrogenation process resulting in the for...

Spectroscopic Investigation of Proteins