M
M. Hietikko
Researcher at University of Oulu
Publications - 8
Citations - 231
M. Hietikko is an academic researcher from University of Oulu. The author has contributed to research in topics: Catalysis & X-ray photoelectron spectroscopy. The author has an hindex of 6, co-authored 8 publications receiving 217 citations.
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Journal ArticleDOI
Effect of Ce-Zr mixed oxides on the chemical state of Rh in alumina supported automotive exhaust catalysts studied by XPS and XRD
TL;DR: In this paper, the performance of a number of γ-Al2O3 supported Rh catalysts containing Ce-Zr mixed oxides in various proportions were investigated by different manufacturing methods and aging was performed in air at 1000°C for 3h.
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Characterization of alumina supported Pd catalysts modified by rare earth oxides using X-ray photoelectron spectroscopy and X-ray diffraction: enhanced thermal stability of PdO in Nd/Pd catalysts
S. Suhonen,Mika Valden,M. Pessa,A. Savimäki,M. Härkönen,M. Hietikko,J. Pursiainen,Risto S. Laitinen +7 more
TL;DR: In this article, a stepwise thermal reduction in high vacuum was performed in order to investigate the effect of noble metal loading, stabilizers and aging on the thermal stability of PdO.
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Effect of the ageing atmosphere on catalytic activity and textural properties of Pd/Rh exhaust gas catalysts studied by XRD
M. Hietikko,Ulla Lassi,Kauko Kallinen,A. Savimäki,M. Härkönen,J. Pursiainen,Risto S. Laitinen,Riitta L. Keiski +7 more
TL;DR: In this article, the effect of thermal, engine bench, and vehicle ageings on catalytic activity and support properties was evaluated mainly by XRD on a real catalytic system.
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Effect of phosphorus poisoning on catalytic activity of diesel exhaust gas catalyst components containing oxide and Pt
V. Kröger,M. Hietikko,D. Angove,D. French,Ulla Lassi,A. Suopanki,Risto S. Laitinen,Riitta L. Keiski +7 more
TL;DR: In this article, the effects of phosphorus poisoning on the activity of powdered exhaust gas catalyst components containing different oxides and platinum were studied and the decrease in the catalytic activity was associated with phosphorus compounds formed with the catalyst components.
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Characterization of the effects of phosphorus and calcium on the activity of Rh-containing catalyst powders
V. Kröger,M. Hietikko,Ulla Lassi,Juha Ahola,Kauko Kallinen,Risto S. Laitinen,Riitta L. Keiski +6 more
TL;DR: In this paper, the individual and combined effects of phosphorus and calcium on Rh-containing catalyst powders have been studied and the results showed a strong deactivating impact of phosphorus on the catalytic activity of these powders.