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K+ doping Ce-Sm oxide catalysts on cordierite honeycomb ceramic substrate for soot catalytic combustion.
- Source :
- Chemical Papers; 2024, Vol. 78 Issue 4, p2275-2285, 11p
- Publication Year :
- 2024
-
Abstract
- Cerium samarium oxides catalysts with K<superscript>+</superscript> doping on the wall surface of cordierite honeycomb ceramics were preparation by sol–gel and dipping processes. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform-infrared spectroscopy were used to characterize the structural morphology and phase compositions. Through XPS analysis and H<subscript>2</subscript>-TPR measurement of monolithic catalyst, it is found that potassium ions improve the oxygen mobility in CeO<subscript>2</subscript> lattice and form surface active oxygen, increase the amount of oxygen adsorbed on the surface and improve the oxidation–reduction capacity. The catalytic combustion research demonstrates that T<subscript>10</subscript>, T<subscript>50</subscript> and T<subscript>m</subscript> in samples (Ce/Sm-0 K, Ce/Sm-0.3 K, Ce/Sm-0.5 K and Ce/Sm-0.7 K) decrease significantly compared with the blank reference (Cordierite). And the optimized sample Ce/Sm-0.5 K possess the lowest T<subscript>10</subscript> (389.6 °C), the lowest T<subscript>50</subscript> (425.5 °C), and the lowest T<subscript>m</subscript> (419 °C) in comparison with other samples. The cycle stability investigation reveals that sample Ce/Sm-0.5 K has excellent structural stability and stable catalytic performance, which has potential application in soot catalytic combustion field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03666352
- Volume :
- 78
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Chemical Papers
- Publication Type :
- Academic Journal
- Accession number :
- 176300571
- Full Text :
- https://doi.org/10.1007/s11696-023-03236-x