Abstract
We have studied platinum catalysts supported on silicon nitride Si 3N4 in the process of deep oxidation of methane. We have used transmission electron microscopy and X-ray photoelectron spectroscopy to study the surface properties of the Pt/Si3N4 samples before and after the catalytic reaction. We have established that the metallic platinum particles in freshly prepared systems are characterized by average sizes of 1.7-5.3 nm, while after the catalytic reaction we observe formation of Pt crystallites up to 30-70 nm in size. We hypothesize that the observed deactivation of platinum catalysts in deep oxidation of methane is connected with crystallization of the metallic particles and their entrainment with the reaction products during catalysis.
| Original language | English |
|---|---|
| Pages (from-to) | 241-245 |
| Number of pages | 5 |
| Journal | Theoretical and Experimental Chemistry |
| Volume | 40 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jul 2004 |
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Keywords
- Deactivation
- Methane oxidation
- Platinum
- Silicon nitride
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Deep oxidation of methane on a Pt/Si3N4 catalyst. / Kurzina, I. A.; Cadete Santos Aires, F. J.; Bertolini, J. C.
In: Theoretical and Experimental Chemistry, Vol. 40, No. 4, 07.2004, p. 241-245.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Deep oxidation of methane on a Pt/Si3N4 catalyst
AU - Kurzina, I. A.
AU - Cadete Santos Aires, F. J.
AU - Bertolini, J. C.
PY - 2004/7
Y1 - 2004/7
N2 - We have studied platinum catalysts supported on silicon nitride Si 3N4 in the process of deep oxidation of methane. We have used transmission electron microscopy and X-ray photoelectron spectroscopy to study the surface properties of the Pt/Si3N4 samples before and after the catalytic reaction. We have established that the metallic platinum particles in freshly prepared systems are characterized by average sizes of 1.7-5.3 nm, while after the catalytic reaction we observe formation of Pt crystallites up to 30-70 nm in size. We hypothesize that the observed deactivation of platinum catalysts in deep oxidation of methane is connected with crystallization of the metallic particles and their entrainment with the reaction products during catalysis.
AB - We have studied platinum catalysts supported on silicon nitride Si 3N4 in the process of deep oxidation of methane. We have used transmission electron microscopy and X-ray photoelectron spectroscopy to study the surface properties of the Pt/Si3N4 samples before and after the catalytic reaction. We have established that the metallic platinum particles in freshly prepared systems are characterized by average sizes of 1.7-5.3 nm, while after the catalytic reaction we observe formation of Pt crystallites up to 30-70 nm in size. We hypothesize that the observed deactivation of platinum catalysts in deep oxidation of methane is connected with crystallization of the metallic particles and their entrainment with the reaction products during catalysis.
KW - Deactivation
KW - Methane oxidation
KW - Platinum
KW - Silicon nitride
UR - http://www.scopus.com/inward/record.url?scp=23944447686&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=23944447686&partnerID=8YFLogxK
U2 - 10.1023/B:THEC.0000041809.10564.dd
DO - 10.1023/B:THEC.0000041809.10564.dd
M3 - Article
AN - SCOPUS:23944447686
VL - 40
SP - 241
EP - 245
JO - Theoretical and Experimental Chemistry
JF - Theoretical and Experimental Chemistry
SN - 0040-5760
IS - 4
ER -