University of Oulu

Mari Honkanen, Mika Huuhtanen, Marja Kärkkäinen, Tomi Kanerva, Kimmo Lahtonen, Ari Väliheikki, Kauko Kallinen, Riitta L. Keiski, Minnamari Vippola, Characterization of Pt-based oxidation catalyst – Deactivated simultaneously by sulfur and phosphorus, Journal of Catalysis, Volume 397, 2021, Pages 183-191, ISSN 0021-9517,

Characterization of Pt-based oxidation catalyst : deactivated simultaneously by sulfur and phosphorus

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Author: Honkanen, Mari1; Huuhtanen, Mika2; Kärkkäinen, Marja2;
Organizations: 1Tampere Microscopy Center, Tampere University, P.O. Box 692, 33014 Tampere University, Finland
2Environmental and Chemical Engineering, University of Oulu, P.O. Box 4300, 90014 University of Oulu, Finland
3Finnish Institute of Occupational Health, P.O. Box 40, 00032 Työterveyslaitos, Finland
4Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, 33014 Tampere University, Finland
5Dinex Finland Oy, Vihtavuorentie 162, 41330 Vihtavuori, Finland
6Faculty of Engineering and Natural Sciences, Materials Science and Environmental Engineering, Tampere University, P.O. Box 589, 33014 Tampere University, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.5 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-05-27


Simultaneous poisoning of sulfur + phosphorus on a platinum-based diesel oxidation catalyst was studied to gain a deeper understanding on the catalyst deactivation. Compared to a single poisoning (sulfur or phosphorus), the simultaneous poisoning had a severe effect on the catalyst activation: light-off temperature for 90% conversion of propene was not reached, this of carbon monoxide was much higher than expected, and the maximum conversion of nitrogen monoxide collapsed. With very comprehensive structural characterization by various methods (e.g. STEM-EDS, XPS, DRIFTS) used, we achieved to conclude an explanation for this. In the case of the S + P-poisoning of the catalyst, formed aluminum phosphate was found to block adsorption sites for sulfur species on alumina and sulfur adsorbs mainly on cerium oxides. In addition, sulfur species remain with and in the vicinity of the platinum particles blocking active sites.

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Series: Journal of catalysis
ISSN: 0021-9517
ISSN-E: 1090-2694
ISSN-L: 0021-9517
Volume: 397
Pages: 183 - 191
DOI: 10.1016/j.jcat.2021.03.026
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
216 Materials engineering
218 Environmental engineering
Copyright information: © 2021 The Author(s). Published by Elsevier Inc.This is an open access article under the CC BY-NC-ND license (