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Study of Pt dispersion on Ce based supports and the influence on the CO oxidation reaction
- Source :
- Chemical Engineering Journal. 255:40-48
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- The effect of Pt dispersion on the different supports was evaluated. The Pt structural and textural properties have been analyzed by XRD, HRTEM and CO pulse chemisorptions. The redox and structure property between Pt and supports was characterized by H 2 -TPR and Raman. CO-DRIFTS characterized the identification of Pt coordination. Results demonstrate that the Pt dispersion is dependent of Ce contents of supports. The Pt supports interaction tends to become weak as Ce content decreasing, leading to higher reduction temperature for active oxygen at low temperature. The stronger interaction for Pt loaded on CeO 2 and Ce 0.7 Zr 0.3 O 2 results in superior CO oxidation performance. The TOF for Pt loaded on Ce based supports presents linear increasing as Pt dispersion increasing.
- Subjects :
- Materials science
General Chemical Engineering
Analytical chemistry
Structure property
General Chemistry
Redox
Industrial and Manufacturing Engineering
Active oxygen
symbols.namesake
symbols
Environmental Chemistry
Dispersion (chemistry)
High-resolution transmission electron microscopy
Raman spectroscopy
Subjects
Details
- ISSN :
- 13858947
- Volume :
- 255
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Journal
- Accession number :
- edsair.doi...........ce4a819f72e51c90f3191ad98d2dc991