UvA-DARE (Digital Academic Repository) Selective catalytic reduction of NO with NO3 over Nb2O5 promoted V2O5/TiO2 catalysts Link to publication Citation for published version (APA): Selective catalytic reduction of NO with NH3 over Nb2Os-promoted V205/TiO

. (1994). Selective catalytic reduction of NO with NO3 over Nb2O5 promoted V2O5/TiO2 catalysts. Catalysis Letters, 25,[49][50][51][52][53][54]. https://doi.org/10.1007/BF00815414 General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. In contrast to previous claims, the addition of niobia to catalysts containing vanadia supported on titania resulted in much enhanced activity for low-temperature SCR of NO with NH3 only at low vanadia loadings. Niobia promoted catalysts could also be demonstrated to show higher selectivities to N2, especially at high temperatures and low vanadia loading. This enhancement of the activity cannot be explained only on the basis of the observation that niobia stabilized the surface area of the catalyst: calculations of the activation energy suggest that a different mechanism of the reaction may be at work at low vanadia loadings