Pt/CeO2 Catalysts Prepared by Laser Ablation - Conference attendances | Sciact - CRIS-system of Boreskov Institute of Catalysis

Pt/CeO2 Catalysts Prepared by Laser Ablation Conference attendances

Language

Английский

Participant type

Стендовый

Conference

EuropaCat-XIII: 13th European Congress on Catalysis
27-31 Aug 2017 , Florence

Authors

Stadnichenko A.I. ^1,2 , Muravyev V.V. ^1,2 , Slavinskaya E.M. ^1,2 , Svetlichniy V.A. ³ , Lapin I.N. ³ , Stonkus O.A. ^1,2 , Kardash T.Yu. ^1,2 , Boronin Andrei Ivanovich ^1,2

Affiliations

1	Boreskov Institute of Catalysis SB RAS
2	Novosibirsk National Research University
3	National Research Tomsk State University

The laser ablation in liquids was used to prepare Pt/CeO2 catalysts. According to XRD and TEM data the type of liquids used for ablation affects on Pt particles size. The preparation procedure affects to the low temperature activity of catalysts in CO oxidation. Pt/CeO2 catalysts prepared from water solutions have no low-temperature activity, while samples obtained in alcohol show excellent activity in CO oxidation even at 0°C. After samples calcination at 450°C and 600°C the CO conversion is more than 40% and 25%, respectively. According to the XPS data, during calcination at 450°C and 600°C metallic platinum transforms to the ionic states Pt2+ and Pt4+. These ionic states could not be attributed to the PtO or PtO2 oxides. The most probable interpretation for ionic platinum is PtCeOx solid solution formation. The possible mechanisms of solid solution formation are discussed.

Stadnichenko A.I. , Muravyev V.V. , Slavinskaya E.M. , Svetlichniy V.A. , Lapin I.N. , Stonkus O.A. , Kardash T.Y. , Boronin A.I.
Pt/CeO2 Catalysts Prepared by Laser Ablation
EuropaCat-XIII: 13th European Congress on Catalysis 27-31 Aug 2017