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In-situ characterization by Near-Ambient Pressure XPS of the catalytically active phase of Pt/Al2O3 during NO and CO oxidation
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 220, s. 506-511Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This study concerns near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) studies of a Pt/A1203 diesel oxidation catalyst used in exhaust aftertreatment. We apply the technique to an industrial-grade porous catalyst, thus bridging both the pressure and materials gap, and probe the shift in binding energy of Pt 4d under different atmospheres. We observe that oxidizing atmospheres induce a shift in binding energy, corresponding to changes in Pt oxidation state, especially pronounced under an atmosphere of NO and O-2. Such changes in Pt oxidation state have previously been linked to dynamic changes in NO oxidation activity.

sted, utgiver, år, opplag, sider
ELSEVIER SCIENCE BV , 2018. Vol. 220, s. 506-511
Emneord [en]
Diesel oxidation catalyst, In-situ, NAP-XPS, Active catalytic, Phase, Platinum
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-217013DOI: 10.1016/j.apcatb.2017.08.047ISI: 000412957200049Scopus ID: 2-s2.0-85028524837OAI: oai:DiVA.org:kth-217013DiVA, id: diva2:1154160
Merknad

QC 20171101

Tilgjengelig fra: 2017-11-01 Laget: 2017-11-01 Sist oppdatert: 2017-11-01bibliografisk kontrollert

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