@article {Centeno:1999:0003-7028:800, author = "Centeno, Miguel Angel and Carrizosa, Ignacio and Odriozola, Jose Antonio", title = "Application of Temperature-Programmed Diffuse Reflectance Infrared Fourier Transform Spectroscopy to the Study of the Thermal Evolution of the Species Present in a Reacted Selective Catalytic Reduction V2O5/TiO2 Catalyst", journal = "Applied Spectroscopy", volume = "53", number = "7", year = "1999", abstract = "Temperature-programmed diffuse reflectance infrared Fourier transform spectroscopy (TPDRIFTS) has been used to characterize a reacted selective catalytic reduction (SCR) vanadia/titania catalyst. At room temperature the reacted catalyst presents ammonium ions adsorbed on the surface. On heating under N2 flow, a surface redox reaction takes place; ammonium ions are oxidized to bridged nitrosyls species, while V5+=O groups are reduced to V3+. Reduction of V5+ species to V3+ ions occurs at lower temperatures than those observed in conventional TPR processes under H2 atmospheres. At higher temperatures, bridged nitrosyls species become monoden-tate, first in an angular configuration and then in a linear one. Previous data on the SCR reaction let us propose that they are desorbed from the surface as gaseous N2O.", pages = "800-804", url = "http://www.ingentaconnect.com/content/sas/sas/1999/00000053/00000007/art00010", doi = "doi:10.1366/0003702991947351", keyword = "TEMPERATURE-PROGRAMMED DIFFUSE REFLECTANCE INFRARE, VANADIATITANIA CATALYSTS, SCR REACTED CATALYSTS" }