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CuO nanoparticles supported by ceria for NOx-assisted soot oxidation: insight into catalytic activity and sintering

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CuO nanoparticles supported by ceria for NOx-assisted soot

oxidation: insight into catalytic activity and sintering

Authors

Tahrizi Andana, Marco Piumetti, Samir Bensaid, Laurent Veyre, Chloé Thieuleux, Nunzio Russo, Debora Fino, Elsje Alessandra Quadrelli, Raffaele Pirone

Publication date

2017/11/5

Journal

Applied Catalysis B: Environmental

Volume 216 Pages 41-58 Publisher Elsevier Description

The current work introduces Cu nanoparticles (Cu-NPs) stabilized by organosilane and deposited as CuO-NPs onto ceria with two different morphologies: spongy, microstructured ceria synthesized by Solution Combustion (CeO2-SCS) and nanostructured ceria nanocubes

(CeO2-NC). Catalytic activity tests have demonstrated that combination of CuO-NPs and

CeO2-SCS bring significance to CO and NO oxidations as it results in easier reducibility and

better metal dispersion on the surface. However, CuO-NPs with CeO2-NC give the opposite

effect on CO and NO oxidations: the increase of Cu loading lowers the catalytic activity. However, Cu/CeO2-NC combination, especially the one with low Cu loading, gives the best

synergy for normal soot oxidation with oxygen, thanks to the structure-sensitivity of the reaction. In the presence of NOx, Cu/CeO2-SCS catalysts are active for soot oxidation at low

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