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Anchoring of palladium nanoparticles on N-doped mesoporous carbon.
- Source :
-
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2020 Sep 30; Vol. 22 (37), pp. 21317-21325. - Publication Year :
- 2020
-
Abstract
- Pd nanoparticles deposited on nitrogen-doped mesoporous carbon are promising catalysts for highly selective and effective catalytic hydrogenation reactions. To design and utilize these novel catalysts, it is essential to understand the effect of N doping on the metal-support interactions. A combined experimental (X-ray photoelectron spectroscopy) and computational (density functional theory) approach is used to identify preferential adsorption sites and to give detailed explanations of the corresponding metal-support interactions. Pyridinic N atoms turned out to be the preferential adsorption sites for Pd nanoparticles on nitrogen-doped mesoporous carbon, interacting through their lone pairs (LPs) with the Pd atoms via N-LP - Pd dσ and N-LP - Pd s and Pd dπ - π* charge transfer, which leads to a change in the Pd oxidation state. Our results evidence the existence of bifunctional palladium nanoparticles containing Pd0 and Pd2+ centers.
Details
- Language :
- English
- ISSN :
- 1463-9084
- Volume :
- 22
- Issue :
- 37
- Database :
- MEDLINE
- Journal :
- Physical chemistry chemical physics : PCCP
- Publication Type :
- Academic Journal
- Accession number :
- 32935678
- Full Text :
- https://doi.org/10.1039/d0cp03234d