caa a22 4500 606173420 CHVBK 20210128100733.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11244-015-0465-y doi (NATIONALLICENCE)springer-10.1007/s11244-015-0465-y The Effect of Phosphorus Exposure on Diesel Oxidation Catalysts—Part II: Characterization of Structural Changes by Transmission Electron Microscopy [Elektronische Daten] [Mari Honkanen, Marja Kärkkäinen, Olli Heikkinen, Kauko Kallinen, Tanja Kolli, Mika Huuhtanen, Jouko Lahtinen, Riitta Keiski, Toivo Lepistö, Minnamari Vippola] Phosphorus poisoning and its effect on the diesel oxidation catalysts morphology was studied by transmission electron microscopy (TEM). The studied catalyst samples were PtPd or Pt supported on the alumina-based washcoat including additives. The laboratory-scale phosphorus exposures were carried out with two different phosphorus concentrations. The cross-sectional TEM samples were prepared from the fresh and phosphorus-treated catalysts. After phosphorus exposures, significant structural changes were observed compared to the fresh catalysts. The shape of the noble metal particles had changed from irregular to more spherical-shaped particles. In addition, phosphorus was detected throughout the catalyst TEM samples but the amount varied depending on the local composition of the support. Phosphorus accumulated mainly in the alumina-containing areas of the support and indications of dense and amorphous aluminium phosphates were found. Based on the results gained, cross-sectional TEM characterization is essential to observe these kinds of morphological changes in the catalysts caused e.g. by phosphorus exposures. In addition, cross-sectional TEM samples are needed to study the effect of local variation in the support composition on the phosphorus accumulation. Springer Science+Business Media New York, 2015 Diesel oxidation catalyst nationallicence Phosphorus poisoning nationallicence Structural characterization nationallicence Transmission electron microscopy nationallicence Honkanen Mari Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut Kärkkäinen Marja Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut Heikkinen Olli Department of Applied Physics, Aalto University, P.O. Box 14100, 00076, Aalto, Finland aut Kallinen Kauko Dinex Ecocat Oy, Typpitie 1, 90620, Oulu, Finland aut Kolli Tanja Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut Huuhtanen Mika Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut Lahtinen Jouko Department of Applied Physics, Aalto University, P.O. Box 14100, 00076, Aalto, Finland aut Keiski Riitta Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut Lepistö Toivo Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut Vippola Minnamari Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/14-17(2015-10-01), 971-976 1022-5528 58:14-17<971 2015 58 11244 https://doi.org/10.1007/s11244-015-0465-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0465-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Honkanen Mari Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut NATIONALLICENCE 700 1- Kärkkäinen Marja Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut NATIONALLICENCE 700 1- Heikkinen Olli Department of Applied Physics, Aalto University, P.O. Box 14100, 00076, Aalto, Finland aut NATIONALLICENCE 700 1- Kallinen Kauko Dinex Ecocat Oy, Typpitie 1, 90620, Oulu, Finland aut NATIONALLICENCE 700 1- Kolli Tanja Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut NATIONALLICENCE 700 1- Huuhtanen Mika Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut NATIONALLICENCE 700 1- Lahtinen Jouko Department of Applied Physics, Aalto University, P.O. Box 14100, 00076, Aalto, Finland aut NATIONALLICENCE 700 1- Keiski Riitta Faculty of Technology, Mass and Heat Transfer Process Engineering, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland aut NATIONALLICENCE 700 1- Lepistö Toivo Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut NATIONALLICENCE 700 1- Vippola Minnamari Department of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/14-17(2015-10-01), 971-976 1022-5528 58:14-17<971 2015 58 11244